Endre søk
Begrens søket
1234567 1 - 50 of 2869
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Treff pr side
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
Merk
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1.
    Aalto, Jonatan
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
    Neuman, Elisabeth
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
    Comparison of Punching Shear Design Provisions for Flat Slabs2017Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Abstract

    A new generation of EN 1992-1-1 (2004) also known as Eurocode 2 is under development

    and currently there is a set of proposed provisions regarding section 6.4

    about punching shear, PT1prEN 1992-1-1(2017). It was of interest to compare the

    proposal with the current punching shear design provisions.

    The aim of this master thesis was to compare the punching shear resistance obtained

    in accordance with both design codes. Furthermore the eect of some parameters

    on the resistance was to be compared. It was also of interest to evaluate the userfriendliness

    of the proposal.

    In order to meet the aim, a case study of a real  at slab with drop panels was performed

    together with a parametric study of a pure ctive  at slab. The parametric

    study was performed for inner, edge and corner columns in the cases prestressed,

    without and with shear reinforcement.

    It was concluded that the distance

    av from the column axis to the contra  exural

    location has a big in uence on the punching shear resistance. The factor

    ddg

    considering concrete type and aggregate properties also has a big impact on the resistance.

    The simplied estimation of

    av according to 6.4.3(2) in PT1prEN 1992-1-1

    (2017) may be inaccurate in some cases.

    The length

    b0 of the control perimeter has a larger eect on the resistance in EN

    1992-1-1 (2004) than in PT1prEN 1992-1-1 (2017).

    In PT1prEN 1992-1-1 (2017), studs located outside the second row has no impact

    on the resistance.

    The tensioning force in a prestressed  at slab has a larger in uence on the resistance

    in PT1prEN 1992-1-1 (2017) than in EN 1992-1-1 (2004). Furthermore,

    the reinforcement ratio is increased by the tendons, and thus aect the resistance in

    PT1prEN 1992-1-1 (2017).

    Clearer provisions for the denition of the support strip

    bs for corners and ends

    of walls are needed in PT1prEN 1992-1-1 (2017).

    It may be questionable if the reduction of the perimeter for a large supported area in

    accordance with 6.4.2(4) in PT1prEN 1992-1-1 (2017) underestimates the resistance

    v

    in some cases.

    Considering the work-load with PT1prEN 1992-1-1 (2017), more parameters are

    included. However, they may not require that much eort to obtain.

    Keywords: Punching shear, resistance, concrete,  at slab, design provisions, Eurocode

    2, case study, parametric study, shear reinforcement, prestressed

    vi

  • 2.
    Aarts, Mariëlle P. J.
    et al.
    Building Physics and Services, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, the Netherlands.
    Aries, Myriam
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Bebyggd miljö. Building Physics and Services, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, the Netherlands.
    Diakoumis, Adonia
    Building Physics and Services, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, the Netherlands.
    van Hoof, Joost
    Fontys EGT—Centre for Healthcare and Technology, Fontys University of Applied Sciences, Eindhoven, the Netherlands.
    Shedding a light on phototherapy studies with people having dementia: A critical review of the methodology from a light perspective2016Inngår i: American Journal of Alzheimer’s Disease and Other Dementia, ISSN 1533-3175, E-ISSN 1938-2731, Vol. 31, nr 7, 551-563 s.Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Light therapy is applied to older people with dementia as a treatment to reset the biological clock, to improve the cognitive functioning, and to reduce behavioral symptoms. Although the methodological quality of light therapy studies is essential, many aspects concerning the description of the lighting applied are missing. This study reviewed light therapy studies concerning the effects on people with dementia as a way to check the methodological quality of the description of light from a light engineering perspective. Twelve studies meeting the inclusion criteria were chosen for further analysis. Each study was scored on a list of aspects relevant to a proper description of lighting aspects. The overview demonstrates that the overall quality of the methodologies is poor. The studies describe the lighting insufficiently and not in the correct metrics. The robustness of light therapy studies can be improved by involving a light engineer or specialist.

  • 3.
    Aarts, Mariëlle P. J.
    et al.
    Department of the Built Environment, Eindhoven University of Technology, Eindhoven, Netherlands.
    Aries, Myriam
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap. Department of the Built Environment, Eindhoven University of Technology, Eindhoven, Netherlands.
    Straathof, Jochem
    Department of the Built Environment, Eindhoven University of Technology, Eindhoven, Netherlands.
    van Hoof, Joost
    Centre for Healthcare and Technology, Fontys University of Applied Sciences, Eindhoven, Netherlands.
    Dynamic lighting systems in psychogeriatric care facilities in the Netherlands: A quantitative and qualitative analysis of stakeholders’ responses and applied technology2015Inngår i: Indoor + Built Environment, ISSN 1420-326X, E-ISSN 1423-0070, Vol. 24, nr 5, 617-630 s.Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Long-term care facilities are currently installing dynamic lighting systems with the aim to improve the well-being and behaviour of residents with dementia. The aim of this study was to investigate the implementation of dynamic lighting systems from the perspective of stakeholders and the performance of the technology. Therefore, a questionnaire survey was conducted with the management and care professionals of six care facilities. Moreover, light measurements were conducted in order to describe the exposure of residents to lighting. The results showed that the main reason for purchasing dynamic lighting systems lied in the assumption that the well-being and day/night rhythmicity of residents could be improved. The majority of care professionals were not aware of the reasons why dynamic lighting systems were installed. Despite positive subjective ratings of the dynamic lighting systems, no data were collected by the organizations to evaluate the effectiveness of the lighting. Although the care professionals stated that they did not see any large positive effects of the dynamic lighting systems on the residents and their own work situation, the majority appreciated the dynamic lighting systems more than the old situation. The light values measured in the care facilities did not exceed the minimum threshold values reported in the literature. Therefore, it seems illogical that the dynamic lighting systems installed in the researched care facilities will have any positive health effects.

  • 4.
    Aarts, Mariëlle P.J.
    et al.
    Eindhoven University of Technology, Eindhoven, The Netherlands.
    van Duijnhoven, Juliëtte
    Eindhoven University of Technology, Eindhoven, The Netherlands.
    Aries, Myriam B. C.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsområde Bebyggd miljö. Eindhoven University of Technology, Eindhoven, The Netherlands.
    Rosemann, Alexander L.P.
    Eindhoven University of Technology, Eindhoven, The Netherlands.
    Performance of personally worn dosimeters to study non-image forming effects of light: Assessment methods2017Inngår i: Building and Environment, ISSN 0360-1323, E-ISSN 1873-684X, Vol. 117, 60-72 s.Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    When determining the effects of light on human beings, it is essential to correctly measure the effects, and to correctly measure the adequate properties of light. Therefore, it is important to know what is being measured and know the quality of the measurement devices. This paper describes simple methods for identifying three quality indices; the directional response index, the linearity index and the temperature index. These indices are also checked for several commonly used portable light measurement devices. The results stresses what was already assumed, the quality and the outcome of these devices under different circumstances were very different. Also, the location were these devices are normally worn has an impact on the results. The deviation range between worn vertically at eye level and the wrist is between 11% (outdoor) to 27% (indoor). The smallest deviation, both in indoor and outdoor, was found when the device was placed on the sides of the eye (7%). 

  • 5.
    Abdula, Sham
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggteknik (BY).
    Oksman, Dan
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggteknik (BY).
    Attefallshus som komplementbostadshus: Drömhus eller mardröm?2015Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Den 2 juli 2014 blev det enligt lag tillåtet för en- och tvåbostadshusägare att uppföra en bygglovsbefriad komplementbyggnad på max 25 kvadratmeter på den egna fastigheten. Rapporten undersöker vilket genomslag lagändringen har haft i Stor-Stockholm, Stor-Göteborg och Stor-Malmö. Undersökningen visar att lagändringen ännu inte har haft något stort genomslag. I rapporten undersöks även en utvald del av marknadsaktörers utbud av attefallshus avsett som komplementbostadshus. 

    Ett attefallshus utformas med miljövänligt hållbara material och inspireras av Vitruvius tre principer för god arkitektur. Huset konstrueras med avsikt att uppfylla kraven som ställs i PBL, PBF, BBR och EKS. Målet med de framtagna bygghandlingarna är att få startbesked från byggnadsnämnden i Växjö. 

  • 6.
    Abdulhalim, Mohammed
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Angmyr, Sebastian
    Tillämpning av Partnering vid ombyggnad av bostäder: Vad krävs för ett framgångsrikt partnering projekt?2013Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
  • 7.
    Abrahamsson, Alexandra
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Arbetsmiljöarbetet på SverigesBostadsrättsCentrum: Vad ändringarna i arbetsmiljölagen innebär2010Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This diploma work was performed because the company Sveriges BostadsrättsCentrum, with the abbreviation SBC, had a need to gain insight into how changes in the Work Environment Act and related regulations which took effect January 1, 2009 affecting their work with the work environment. The changes mean that the client may hand over his work environment responsibilities to a contractor and that he has to select so-called building work environment co-ordinators. At SBC they are working as representatives for tenant-owner's association when a construction is about to be carried out. The purpose was to ascertain how changes may affect the work at SBC. The diploma work intends to educate the staff at SBC how work with the work environment would look like if they met the regulatory requirements. The main issue that the diploma work deals with is whether SBC has the responsibility to select a building work environment co-ordinator for the planning and projecting before the contractor takes over responsibility for the work environment. Questions were answered by information from the Work Environment Act, AFS 1999:3 and other material from the Work Environment Authority. Two interviews with staff at the Work Environment Authority were also held. One of the conclusions drawn from the diploma work is that it’s the client who will select a building work environment co-ordinator for the planning and projecting. That should be done as soon as the planning and projecting has begun. The planning and projecting usually begins before the main contractor takes over responsibility for the work environment as the employee. It is not clear that SBC will take on the client’s responsibility to select a building work environment co-ordinator for the planning and projecting in the early planning, before the contractor takes on responsibility and there are several ways to do this.

  • 8.
    Abrahamsson, Caroline
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    Waltersson, Johanna
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Tillämpad mekanik, Byggteknik.
    FLEXIBLA BYGGNADER: Utformning av en förskola med en möjlig verksamhetsändring för framtida behov2014Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [sv]

    För att uppnå ett långsiktigt hållbart samhälle ställs idag höga krav på en miljömässigt och ekonomiskt hållbar utveckling. Samhällets expansion i form av nybyggnation är en stor del i detta. Genom att planera och bygga mer långsiktigt hållbara byggnader så kan dessa krav uppfyllas. Att skapa flexibla byggnader, som kan anpassas efter samhällets framtida behov, leder till en effektivisering av lokalutnyttjandet och genererar mer långsiktigt hållbara byggnader. I Sverige är kommunerna landets största byggherrar och de har därför ett stort ansvar att förse samhället med fastigheter och då framförallt offentliga lokaler. En typ av offentliga lokaler där behovet av flexibla byggnader är stort är förskolor, i och med att det är svårt att förutse hur det framtida behovet av förskolor kommer att se ut då storleken på barnkullarna varierar.

    Detta examensarbete inom högskoleingenjörsprogrammet i byggteknik har utförts under tio veckor på Tengbom Arkitekter i Uppsala. Arbetet behandlar ämnet flexibilitet i byggnader och innefattar ett förslag på utformningen av en flexibel byggnad i form av en förskola som i framtiden kan konverteras till ett äldreboende.

  • 9.
    Abrahamsson, Mickael
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Berg, Simon
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Tillfälliga modulhus - en ekonomisk och kvalitetsmässig analys2016Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    The populations of Sweden are right now facing an acute housing shortage. One of the reasons of this is the huge amount of immigrants that have been taken in over recent years. The construction industry hasn’t been able to keep up with the rising demand and is right now looking for a solution. Modular housing is one solution that has been proposed by Boverket, the national board of housing, building and planning as it reduces construction times. The purpose of this paper is to analyze this method and the potential consequences/gains it has. In this paper we have used three different case studies were we have done 3 interviews in each.   This research concludes that the problem doesn’t lie within the quality or the costs associated with modular housing. It lies within the temporary building permits that are often used when time is of the essence. 

  • 10.
    Adevik Hammensten,, Sebastian
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap.
    Axelsson, Erik
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap.
    Solsidan – Utnyttjande av solenergi i småhus2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
  • 11.
    Adiego Abad, Sonia
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Degree project:HOSTEL2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    A construction project including planning, cost estimation and design of a Hostel on a property in the city of Halmstad.

  • 12.
    Adolfsson, Rasmus
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013).
    Utformning av en infästningsstandard: En utveckling av kvalitetsarbetet hos Nordmarkens Fasader AB2015Independent thesis Basic level (university diploma), 15 poäng / 22,5 hpOppgave
    Abstract [sv]

    Då byggbranschen idag ställer allt högre krav på dess aktörer och rutiner för att säkra kvaliteten påden slutgiltiga produkten, har kvalitetsarbetet också ökat i en större grad. Något som spelar en storroll i detta arbete är kvalitetssäkringen. Kvalitetssäkring innebär ett systematiskt arbete som oftaföljer ett visst kvalitetssystem eller kvalitetsmärke. Att detta bedrivs bevisas ofta genom en visscertifiering.Nordmarkens Fasader i Töcksfors tillverkar och monterar fönster, dörrar, fasader och tak i aluminiumoch glas. För att säkra kvaliteten på sina produkter arbetar de efter P-märkningssystemet som senareleder till att de får P-märka sina produkter. P-märkningen är Science Partners eget kvalitetsmärke ochbevisar bland annat att produkten uppfyller lag- eller myndighetskrav men också i de flesta fall andraoch högre krav som marknaden efterfrågar.Nordmarkens Fasader arbetar efter en kvalitetsmanual, som i sin tur är har utformats efter reglernaför P-märkning. Denna är den officiella sammanfattade beskrivningen av P-märkningen ochinnehåller eller hänvisar till alla dokument och dokumenttyper som ingår i Nordmarkens Fasaderskvalitetssystem.För att Nordmarkens Fasaders produkter ska utvecklas ännu ett steg i arbetet mot en god kvalité ochfunktion vill de i kvalitetsmanualen upprätta ett moment som behandlar infästning av partier i vägg.Allt detta för att få bättre koll på vad som händer med produkterna efter tillverkning. Något som gördetta än viktigare är att de inte alltid sköter montaget av sina produkter. En infästningsstandardskulle i detta fall leda till att de kan påverka sina kunder och vad som händer efter tillverkningen. Föratt uppnå detta krävdes det att en standard för infästning av element i vägg utformades och sedanockså integrerades i kvalitetsmanualen.Eftersom att det finns så många väggtyper att välja bland, så valdes den vanligaste och mestförekommande av dessa ut. Det hela resulterade i ett antal standardritningar som visar vart några avNordmarkens Fasaders produkter bör infästas i den utvalda väggtypen. För att detta sedan skullekunna tas i bruk i vardagen integrerades också standardritningarna i kvalitetsmanualen. Förutomdessa standardritningar, reviderades manualen samtidigt som det skapades nya dokument i denna.Allt för att nå det bästa resultatet med Nordmarkens Fasaders eget kvalitetsarbete.Detta arbete ska kunna fungera som en grund för framtida arbete med infästningsritningar ikvalitetsmanualen, då det finns intresse av att föra in fler väggtyper i denna.

  • 13.
    Adolfsson, Robin
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013).
    Jönsson, Caroline
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013).
    Är SundaHus materialklassning kompatibel med Miljöbyggnads, BREEAMs och LEEDs materialkrav?: En studie om SundaHus miljöklassningar.2015Independent thesis Basic level (university diploma), 15 poäng / 22,5 hpOppgave
    Abstract [sv]

    Vi lever i ett samhälle där det är brist på bostäder och kraven på nya och hållbara byggnader är allt större. De hus som byggs idag har fokus på att vara energisnåla för att spara på resurser. Något som glöms bort är valet av material till huskonstruktionerna. Material kan påverka natur och människor från vagga till graven genom till exempel materialets farliga ingående ämnen. Certifieringssystemen Miljöbyggnad, BREEAM och LEED har kontrollerats och deras materialkriterier har tagits fram. Genom ett urval av konstruktionsmaterial tagna ur SundaHus har en granskning gjorts på dessa material gentemot certifieringssystemens kriterier på material för att se om de är kompatibla. Minoriteten av kriterier var granskningsbara mot separata material och gick att kontrollera i SundaHus. Nästan alla material klarade kriterierna som kunde användas från Miljöbyggnad och BREEAM oavsett klassning i SundaHus. Inga av LEEDs kriterier var kompatibla med SundaHus för separata material. Det faktum att de sämre klassningarna i SundaHus kunde klara kriterierna som granskades tyder på att kraven i miljöcertifieringssystemen är för låga. Högre och fler krav borde ställas gällande enskilda material och farliga ämnen i dem.  

  • 14.
    af Klintberg, Tord
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Heated air gaps: a possibility to dry out dampness from building constructions2008Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The air gap method is a modification of the common way of building indoor walls and floors. The aim of the method is to make a construction, less fragile to water damage, with air gaps where moisture can be removed with a thermally driven air flow, caused by a heating cable. The thesis includes a number of experimental studies of this method.

    Temperature and convective air flow in a vertical air gap was studied and it was noted how air flow increased with raised power of the heating cable. The air flow for one meter of wall varied between 50 m3/day (13 air changes per hour) and 140 m3/day (36 air changes per hour). The lower value was caused by a temperature difference in the range 0.2-0.3 oC. Without heating no air flow was found.

    In studies of moisture and RH in wet “slab on ground” constructions, it was noted how the slab in the room with the air gap method dried to a much higher extent than the slab in the room built in an ordinary way. It was also noted that moisture was transported from the air gap in the floor and up through the air gap in the wall. In the room with the air gap construction, the RH values beneath the floor was at a lower level (and below 75 % RH) than the RH values beneath the floor of conventional construction. Mould does not grow below 75 % RH.

    In the study of a flooded intermediate floor it was noted how the thermally driven convective air flow evidently speeded up drying of the construction. Mould growth was only noted in the case where the heating cables were turned off.

  • 15.
    af Klintberg, Tord
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Björk, Folke
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Air gap method: measurements of airflow inside air gaps of walls2008Inngår i: Structural Survey, ISSN 0263-080X, Vol. 26, nr 4, 343-363 s.Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose - Water damage is a severe problem in modern construction, causing economic loss and health implications. By using the patented Air Gap Method inside building constructions, harmful water in the construction can be dried out. The method drains and ventilates air gaps inside walls and floors with an airflow driven by thermal buoyancy caused by a heating cable in vertical air gaps. This paper aims to investigate this method and measurements of airflow inside air gaps of walls. Design/methodology/approach - This study investigates the measured correlation between the power of the heating cable, the difference of temperature inside and outside the air gap, and the airflow. Data are collected by experimentation with a full-scale constructed wall. Findings - The study finds that airflow increases with raised temperature difference between the air gap and room and with raised power of the heating cable. The measured airflow reaches values up to 140 m3/metre wall and day for one cable. A small increase in temperature, between 0.2 and 0.3 oC inside the vertical air gap results in an air flow of approximately 60 m3/metre wall and day. The air change rate per hour for the air inside the wall construction varies between 15 times for a 6 W/m cable and 37 times for a 16 W/m cable. Practical implications - The method provides the means to build houses in a more robust way, minimising the negative effects of water damage. This investigation provides an understanding of how temperature and ventilation are related in this method of construction. Originality/value - The issue of ventilated construction is rarely investigated in scientific research.

  • 16.
    af Klintberg, Tord
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Jóhannesson, Gudni
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Björk, Folke
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Air gaps in building construction avoiding dampness and mould2008Inngår i: Structural Survey, ISSN 0263-080X, Vol. 26, nr 3, 242-255 s.Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Purpose - Water damage is a severe problem in modern construction, causing economic loss and health implications. The patented Air Gap Method, which is a slight modification of the common infill wall construction, provides means to build houses in a more robust way, minimizing the negative effects of water damage. This full-scale study of the method aims to show how walls and floors may be built to create ventilation within the construction, with air gaps equipped with heating cables. The general hypothesis is that the patented Air Gap Method drains and evaporates dampness after water damage. The purpose of this study is to show how the method is built and how the method deals with water damage, such as a flooding, and with mould growth. Design/methodology/approach - The Air Gap Method is based on a common timber-framed construction and is completed by the provision of inlets, air gaps, slits, and outlets. The power for the convective airflow is given by an electrical heating cable. The study was carried out as a full-scale experiment using a 24m2 large apartment build by this method. This apartment was flooded with 120 litres of domestic wastewater and the drying period was compared when heating cables were switched on or not. Mould growth was also investigated. Findings - The method dries out a flooded floor in nine days when two heating cables were switched on, in 13 days with one heating cable and 21 days when the heating cables were off. The method prevents all mould growth provided that the indoor RH is lower than 65 per cent. Practical implications - The method provides means to build houses in a more robust way, minimizing the negative effects of water damage. Originality/value - The issue of ventilated construction is rarely investigated in scientific research.

  • 17.
    Afkari, Arash
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Sustainable Low-Cost Housing in Ethiopia: A Study of CSSB-Technology2010Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This degree project is about sustainable low-cost housing in Ethiopia with a focus on CSSB-technology, which is one method of constructing houses. The project allowed me to visit Ethiopia during seven weeks in 2010, to observe, gather information and to perform tests regarding the specific subject. It is a sub-project to a larger research project initiated in 2002 at Halmstad University in an attempt to introduce low-cost housing technologies for the Kambaata Region in Ethiopia. The aim of the research project has been to develop and test new, sustainable, low-cost building technologies intended for the population, with regard to local traditions, needs and affordability.

  • 18.
    Agebro, Andreas
    Högskolan i Gävle, Akademin för teknik och miljö, Avdelningen för bygg- energi- och miljöteknik.
    Datormodellering av en värmelagrande betongväggs inverkan på det termiska klimatet i ett växthus2010Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This report describes the building of a computer model that makes it possible to simulate the thermal climate in a greenhouse. The computer model is built on the physical theory of heat exchange that occur in a greenhouse, such as radiation and convective heat exchange. The model also includes the heat storage that is active in a greenhouse.

    The computer model is used to simulate the thermal climate in a greenhouse under three periods, winter, spring and summer. It also investigates which effect a concrete wall has on the thermal climate in a greenhouse. The purpose of putting a concrete wall in the greenhouse model is to investigate the possibility to store heat during the day and then use this heat when the temperature drops during the night.

    The result from the simulations shows that a concrete wall levels the big difference in temperature that normally occurs under a day in a greenhouse. It also shows that heat is stored in the concrete wall and during the night the wall temperature is higher than both the outdoor temperature and the greenhouse temperature. This makes the wall a source of heat during this time.

  • 19.
    Agnesson, Stina
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Bagger-Sjöbäck, Josefina
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    PREFABRICERADE SMÅHUS PLANLÖSNINGAR: En jämförelse mellan tillverkare och kund2012Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Syftet med arbetet är att analysera utformningen av planlösningarna i prefabricerade småhus. Resultatet ska kunna utnyttjas som underlag vid planlösningsutformning och möjliggöra planlösningar med färre kundändringar.  

    Metoder som används är litteraturstudier, intervjuer och en fallstudie. Fallstudien är gjord med material från företaget Anebyhus som tillverkar prefabricerade småhus. Ur en av deras kataloger valdes tre olika hus med snarlika förutsättningar. Det som analyseras är tillverkares och kunders prioriteringar samt de vanligaste kundändringarna. Problemet är att om kunden ska bli nöjd med den slutliga planlösningen måste kunden och tillverkaren ha liknande kvalitetsprioriteringar. Ändringar som återkommer frekvent är ett tecken på en svaghet i ursprungsplanlösningen.

    Resultaten visar att tillverkare av prefabricerade småhus möter kundernas behov och önskemål genom prioriteringar av livslångtboende och flexibilitet i planlösningen. Kunderna visar prioritering av mer bänkytor i köket, vardagsrummet storlek och samband till köket och att alla i familjen ska få varsitt sovrum. De kundändringar som förekommer mest frekvent är minskning av antalet klädkammare, sammanslagning av teknik och klädvård samt att ändra till en U-formad köksuppställning. 

  • 20.
    Agriam, Pia
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Socialt hållbart boende2016Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Det behövs mer forskning kring vad som ger människan goda förutsättningar till livskvalitet i en bostadsmiljö. Social hållbarhet är ett ämne som arkitekturvärlden värnar om mer än någonsin. Målet är att ta fram ett kunskapsunderlag baserat på erfarenheter från brukare, arkitekt samt beställare som kan användas till gestaltning av bostadsområden med flerbostadshus.

    För att uppnå målet besvaras frågeställningarna ”Hur värderas socialt hållbart boende, enligt arkitekter och beställare, när bostadsområden med flerbostadshus utformas?” samt ”Hur upplevs det som värderas som socialt hållbart, i bostadsområden med nyproducerade flerbostadshus, av brukare?” Frågeställningarna besvaras med hjälp av en enkätundersökning och intervjuer som tillsammans utgör en kvalitativ forskningsmetod.

    Resultatet visar att social hållbarhet kan ses ur olika vinklar. Det är vanligt att se på social hållbarhet ur ett samhällsperspektiv och ur en stads perspektiv i enlighet med vetenskapliga referenser. Som en övergripande sammanfattning är det en byggnads vackra form, utseende och dess funktionsduglighet som vägs in med en rimlig kostnad som skapar ett socialt hållbart boende enligt intervjuer med arkitekt och beställare. Det handlar om en balansgång mellan skönhet, funktion och ekonomi som tillsammans skapar ett boende som håller över tiden och bekräftar människans sociala värdighet. Enligt de som bor på området Nysäter i Mölnlycke som är det studerade objektet, handlar socialt hållbart boende om trivsel, trygghet, privatliv och samhörighet. Tillgång till natur och uteaktiviteter, frisk luft och god grannsämja är andra faktorer som värderas högt. Därmed har socialt hållbart boende kopplingar till både fysiskt greppbara parametrar samt icke fysiska kvaliteter som behöver sammanlänkas med varandra.

    Det sammanfattande resultatet belyser de väsentliga aspekter som bör inbegripas vid planering av ett nytt bostadsområde för att det ska bli socialt hållbart för de boende. Kunskapsunderlaget följer en logisk ordning från att analysera ett orört område med dess kvaliteter till att analysera hur den privata bostaden ska uppfylla människans behov av välbefinnande.

    Rapporten är bred i sitt ämnesval även om den begränsas till människans förhållande till bostaden och bostadsområdet i sociala sammanhang, hur individer upplever sin omgivning både i och utanför bostaden. Ytterligare begränsningar hade gjort att en djupare forskning kring ett specifikt tema hade kunnat genomföras.

  • 21.
    Ahlgren, Ahlgren
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Ekblad, Alexander
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik. Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik och belysningsvetenskap.
    Förvaltande byggherrars inställning till BIM2017Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
  • 22.
    Ahlgren, Josef
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Andersson, Stefan
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Klintenheim, Johannes
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Uppvärmning och miljöpåverkan: -en jämförelse mellan fjärrvärme och bergvärme i villa2008Independent thesis Basic level (professional degree), 10 poäng / 15 hpOppgave
    Abstract [en]

    Many of todays studies show that district heating is one of the betteralternatives as heating source because of its low environmental load.

    The energy source is often leftovers from other processes producing energy or waste, like garbage or chips.

    Electricity in combination with geothermal heating is another heating system that has increased sharply during the last years, and also this system decreases the discharges that have negative affects

    on the environment compared to several other heating methods.

    This report aims to, concentrated towards these two different heating systems, estimate the amounts of discharges they indirect cause and how the environment is affected.

    We have calculated the mean value for discharges of carbon dioxide, nitrogen oxide, sulphur oxide and dust generated from electrical power used in Sweden.

    Through interviews and research we have gained data for the same substances that district heating based on combustion of garbage and biofuel generates.

    We have also in cooperation with a housing company chosen a building we see representative for many of the new single-family houses built in Sweden today.

    Based on its shape and appearance we theoretically created three alternatives of the same house, each of them with climate screens different from each other.

    Together with the amounts of discharged environmental affecting substances, these houses were the base for our calculations and studies when investigating the different heating sources environmental effect.

    The results have thereafter been analyzed and discussed from different angles.

  • 23.
    Ahlstedt, Simon
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Poomann, Siim
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Uppgradering av prefabricerad villa till passivhus, baserad på en husmodell från Götenehus AB2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Rising energy prices, growing energy use and the current climate debate is a major contributing factor to today's search for new, more economical ways to use energy. The Swedish national building and planning department (Boverket) places greater demands on energy use in new housing. Local governments also place specific requirements on certain residential housing projects in addition to the requirements of Boverket, i.e. only passive houses may be built in certain areas. The terms passive house, zero-energy house and plus-energy house are becoming increasingly common in the construction industry and house manufacturers want  to offer products that meet these new requirements.

    This thesis examines whether it is possible to upgrade a pre-fabricated house so that it meets the requirements to be classed as a passive house according to FEBY (translated - Forum for energy-efficient buildings). The study is based on established calculation and production techniques used in Götenehus AB, a manufacturer of prefabricated homes. A case study based on the upgrade of a house from Götenehus is performed and the results are compared with the original house from energy and economic points of view. The production stage is also taken into consideration to see if the engineering solutions required for the upgrade can be produced with the methods in use today.

    The methodology used to process the subject have been literature studies, a case study, own calculations and consultations with staff at Götenehus and other people, who have knowledge on the subject. Energy calculations have been made using the energy  calculation software TMF-Energy v2.1, which Götenehus currently uses to calculate the energy performance of their houses. The results show that it is possible to upgrade the original house to meet the requirements for passive houses with changes made in the building envelope and heating and ventilation systems. The solution presented includes changes in all parts of the building envelope and replacement of the ventilation and heating systems. Instead of the exhaust air heat pump in the original house, a district heating system in combination with solar panels are used. The ability to combine different systems has been limited to the combinations that were available in the calculation software. The results also show that the investments needed for construction and installations are not financially justifiable. Also, the running costs for the passive house are bigger. The energy consumption for the passive house remains the same as in the original house.

  • 24.
    Ahlsten, Anton
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
    Karlsdotter, Ellen
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
    Numeriska simuleringar av betongplattor på mark med gradientkrympning och sprickfördelande armering2014Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Betongplattor på mark är en ofta använd grundläggningsmetod. Trots detta är sprickbildning ett vanligt problem där kraven på maximala sprickvidder ofta inte uppfylls. De sprickor som bildas i plattorna uppkommer bl.a. till följd av dess uttorkning, och då olika fuktförhållanden råder på var sida om plattan utvecklas en krympning som varierar med en gradient över tvärsnittet. Vid dimensionering av armeringen för denna inre last och sprickbildningen den orsakar, finns endast otillräckliga analysermetoder att tillgå i normer. Att analysera det tvång som uppstår vid krympningen är mycket svårt, speciellt då betongen spricker och lastfallet blir statiskt obestämt.

    I detta arbete undersöks sprickbildningen i krympande betongplattor på mark så att noggrannare dimensionering av den sprickfördelande armeringen skall kunna utföras. Analyserna har utförts med numeriska simuleringar i FEM-programmet Atena 2D där ett antal olika plattor med varierande betongklass, armeringsinnehåll och platthöjd undersökts. Arbetet omfattar en jämförelse av de erforderliga sprickfördelande armeringsinnehållen samt de analytiskt beräknade sprickvidder som erhålls dels enligt huvuddokumentet för Eurokod 2 och dels enligt huvuddokumentet och den tyska nationella bilagan. Armeringen har då dimensionerats utifrån en spänningsfördelning som varierar linjärt över tvärsnittet, på samma sätt som krympningen varierar. Studien behandlar även en jämförande undersökning av sprickutvecklingen vid inre respektive yttre last för att påvisa skillnader i sprickbeteendet.

    De numeriska simuleringarna visade att en ökad sprickfördelande förmåga och en minskning av sprickvidder erhålls då armeringsinnehållet i en platta ökas. Av de undersökta plattorna nås armeringens flytspänning inte i något fall, vilket tyder på att mängden armering kan minskas ytterligare utan att s.k. single cracks uppstår. Även vid underarmering, då armeringen minskas till 64 % av vad Eurokods huvuddokument anger, behålls den sprickfördelande funktionen. Undersökningarna visade att den sprickbildning som sker av den inre lasten vid krympning är beroende av uppsprickningen, till skillnad från sprickbildning vid yttre last. Den jämförande studien över armeringsinnehåll enligt Eurokod 2 visar att dimensionering enligt tyska nationella bilagan under verkan av inre last ger en reducerad erforderlig armeringsarea med 20 % i förhållande till huvuddokumentet. De analytiska beräkningarna över sprickvidder tyder på att beräkningsmetoden enligt Eurokod 2 ger större sprickvidder än den som beräknats enligt den tyska nationella bilagan.

  • 25.
    Ahlstrand, Sanna
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Bender, Johanna
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Nordström, Linn
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    A more efficient way of building in a developing country, influenced by industrialized building: A case study in Leticia, Colombia2015Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    Purpose:The purpose of this study is to approach a solution to reduce housing shortage, by using inspiration from an industrialized building concept, which can lead to the opportunity for underprivileged people to get a livable housing. The aim is to study how knowledge from industrialized building could be used for a more efficient way of building in developing countries similar to Colombia.

     

    Method:Utilizing literature studies for achieving abutment to published research also giving the authors an observant mind. With this knowledge, participatory observations were made as action research to explore the prevailing procedure when establishing a house. Operating analyzes, interviews were held in Leticia for understanding observed decisions. To be able to critically analyze the results from the interviews and observations, collected data were compared with knowledge based on the authors’ reference frames.

     

    Findings:Keystones identified as the overall concept are applicable on establishments in the western world, since the concept is designed after similar conditions. Capital is required designing a building system as well as establishing a factory for prefabrication of elements, conditions limited in developing countries. Climate conditions and prevailing corruption prevents implementation of the concept. Identified weaknesses during the observations, noted repetition of unnecessary and non-value adding activities. One conclusion is not to implement the entire industrial building system, only practice the mindset. Initially keystones are implemented such as planning, exchange of information and reflection of performed projects, in order to improve upcoming projects. These keystones require no direct capital, merely a mindset that should be implemented.

     

    Implications:The outcome of this study is to enlighten the subject, since obvious weaknesses were noticed, with capacity for development. Further research is realistic because, in a long term it will help solving the housing situation. For example, using this result as underlay for education like creating more efficient building, enlightening planning for reducing unnecessary non value-adding activities. As a conclusion of the study, identified weaknesses during the establishment affects the efficiency, creating unnecessary costs. A developing country should focus upon emphasizing reduction of costs, since their economic status is already declining.

     

    Limitations: The observations during the case study have been concentrating on one small-scaled project in Leticia, Colombia. No further observations have been made but complements such as literature studies and interviews. Due to lack of time and language barrier, the amount of collected empirical data was too limited to provide durable conclusions for question formulations. Since only observations were performed on one establishment, a general result cannot be submitted.

  • 26.
    Al Jaafar, Jaafar
    Växjö universitet, Fakulteten för matematik/naturvetenskap/teknik, Institutionen för teknik och design.
    Projektering av platsbyggd villa2008Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Abstract (in English)

    "This thesis work is a design project of an on-site construcktions. The issue addressed by the project was how to

    devise and design an detached house

    I have examined which architecture-drawings, construcktion-drawings and static calculations are needed to

    produce an on-site construcktions detached house.

    The result is presented in the finished drawings for the construction documents, which show a one-storey

    detached house with an attractive/accessible construction plan. It uses the combination of a strong style of

    architecture and a clear influence of functional design. This is clarified by the bench ceilings, and the facade,

    which is partly laying panel, partly white trimmed.

    Size: 153 square meters

    Number of rooms: 6, where of 3 are bedrooms."

  • 27.
    Al Jaafar, Jaafar
    Växjö universitet, Fakulteten för matematik/naturvetenskap/teknik, Institutionen för teknik och design.
    Projektering av platsbyggd villa2008Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Sammanfattning

    Detta examensarbete är ett utformningsprojekt av en platsbyggd villa. Frågeställningen till

    projektet var hur man kan utforma en villa.

    Jag har undersökt vilka A-ritningar, K-ritningar samt statiska beräkningar som behövs för att

    producera en platsbyggd villa.

    Resultatet visar färdiga ritningar till bygghandlingar vilket betyder enplans villa med

    attraktiv/öppen planlösning och en stark byggnadsstil med tydliga inflytanden av funkisstil.

    Detta tydliggörs genom pulpettaken, och fasaden som är delvis liggande panel, delvis vit

    putsad.

    Yta: 153 kvm

    Antal rum: 6, varav sovrum: 3

  • 28.
    Alamerison, Seif
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Energibalansen för ett nytt flerbostadshus i Mellansverige: Beräkningar intervjuer och analys av energikraven i Boverkets Byggregler2010Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Abstract

     

     

     

    This degree project comprises 30 credits, i.e. 20 weeks of work. The work mainly deals with the energy balance for a multi-family house in Västerås and the requirements for energy conservation in the Swedish building code, BBR. Calculations of the energy balance are supplemented by a number of interviews.

     

    Energy conservation in general has become more important in recent years and the subject is in line with increased public awareness. This importance and attention is explained by environmental problems in general and global warming in particular, but also by rising energy prices. The Swedish authority Boverket has gradually changed the regulatory framework in order to improve the energy efficiency for new buildings. Boverket issues the Swedish building code BBR which includes energy requirements for buildings. The new BBR 16 was published after only about 6 month after the previous version BBR 15.

     

    This degree project includes a commission from the company Abetong AB to compare the previous BBR 15 against the new BBR 16 and find any changes, and compile these changes as clear as possible. The work also includes answers to some specific questions from the same company. One question is whether existing multi-family houses from the company would meet the new energy requirements of BBR 16. The energy balance of these houses is studied specifically when an exhaust air heat pump or a ventilation heat exchanger is used in order to save energy. To make this work particularly interesting, the window area was changed to see how this would affect the energy use in the buildings.

     

    To answer these questions, the energy simulation program VIP+ was used for calculations. These computer calculations have also been supplemented by hand calculations as a control measure. All results from the different calculations are put together and analyzed in this report.

     

    The overall conclusion from the calculation results is that the existing multi-family houses perform well with the present technology, and that they meet the new energy requirements in BBR 16. This means that no further measures in order to save energy in the houses are necessary in order to meet the newest requirements.

     

     

     

    Västerås 2010-05-24

    Seif Alamerison

  • 29.
    Al-Ansari, Nabil
    et al.
    Växjö universitet, Fakulteten för matematik/naturvetenskap/teknik, Institutionen för teknik och design.
    Te Seng, Meng
    Växjö universitet, Fakulteten för matematik/naturvetenskap/teknik, Institutionen för teknik och design.
    Studentbostäder i trä med Prefab-teknik2009Independent thesis Basic level (degree of Bachelor), 80 poäng / 120 hpOppgave
    Abstract [en]

    The Results of this thesis was the creation of two designed house variants with a module to

    all the apartments. In addition till the first module there are three other modules of

    apartments that can be put in the houses if it so needs. The house are volume prefabricated

    and are placed on site in a way that it create an enclosure of the area which faces against the

    nature and car parks also lies hidden behind these houses.

    For the actual structure, a cross beam was created to carry the floor above and it is support

    by all four walls. The structure between the first and the second floor has no "syll" but

    instead there are two differently alternative to linking the floors in order so that it will not

    move. The reason with this solution was that there will not be any subsidence when the

    forces from above are pressed down ward. The forces are instead directly down to the next

    timber frame system. This can happen when the real estate's owner might want to build

    more floors on the house than the present two floors house when there is no land to build

    and spaces are needed in the future.

  • 30.
    Al-Ayish, Nadia
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap.
    Grimlund, Tor
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggnadsteknik.
    Projektering av ett småhus med fördjupning inom värmesystem2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
  • 31.
    Albertsen, Henrik
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggteknik (BY).
    Lindberg, Amanda
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggteknik (BY).
    Lokalt omhändertagande av dagvatten på bostadsfastigheter2016Independent thesis Basic level (professional degree), 180 hpOppgave
    Abstract [sv]

    Ett behov finns av att fördröja dagvatten innan det släpps på det kommunala ledningsnätet för att minska flödestopparna och undvika överbelastning. Studien avser att ta fram en förenklad metod för val och utformning av LOD-metod som är anpassad för privata fastighetsägare.

    Ett flertal LOD-anläggningar samt förutsättningar kring dessa har undersökts. Studien har gett en grundläggande information och en beräkningsgång som har förenklats, är lätt att följa och som kan anpassas efter befintliga förutsättningar och önskemål. 

  • 32.
    Albrektsson, Joakim
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
    Flansbjer, M.
    CBI .
    Lundqvist, J. E.
    Jansson, Robert
    Assessment of fire exposed concrete with full-field strain determination2011Inngår i: 2nd International RILEM Workshop on Concrete Spalling due to Fire Exposure, 2011, 337-344 s.Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A concrete structure exposed to fire deteriorates when the temperature increase in the structure. An experimental study has been performed in order to evaluate the degree of degradation of concrete exposed to two different fire scenarios. As the thermal diffusivity of concrete is low, high thermal gradient is induced in the cross-section. This causes inhomogeneous mechanical properties of a concrete structure. In traditionally core testing of the elastic modulus and compressive the material is assumed to be homogeneous, this is not the case when concrete has been exposed to a real fire. By using an optical full-field strain measuring device the mechanical response at different depth, from the fire exposed surface, can be studied. In this study a typical concrete mix for civil engineer applications were used. In addition a similar concrete mix with reduced aggregate size was tested. The test samples were exposed to the standard fire curve ISO 834-1 or a temperature rise of 10 °C/min. In addition, Ultrasonic Pulse Velocity measurement and PFM Microscopy were conducted in order obtain a reliable picture of the residual mechanical properties and the durability.

  • 33.
    Albrektsson, Joakim
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
    Jansson, Robert
    Capillary suction and chloride migration in fire exposed concrete with PP-fibre2012Inngår i: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR), 2012, 128-129 s.Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Annually, several concrete structures, such as buildings, bridges, parking garages, tunnels, etc. are exposed to fires. Many fires are small, for example single car fires in tunnels. These fires do not affect the load carrying capability of the concrete structure and thus minor or no reparations are required. In modern concrete for civil engineer applications the use of Polypropylene fibres (PP-fibre) to reduce fire spalling is growing. Some studies have been carried out which indicate that the use of PP-fibres will not affect the durability of the concrete. But in case of a fairly moderate fire exposure, a fire exposure that does not lead to structural damage, the PP-fibres can potentially lead to reduced durability. During low intensity fires or at long distances downstream a large fire in a tunnel the PP-fibres melts and form channels in the concrete. After such degradation of the PP-fibres it is plausible that accelerated damage may occur when moisture, de-icing salts and carbon dioxide can more easily penetrate the concrete. In this experimental study the chloride migration and the capillary suction are studied in moderately heated concrete containing PP fibres. The chloride migration tests were conducted with heated samples with and without PP-fibres. The capillary suction tests were even conducted with different fibre contents. As a reference the results are compared with results from unheated concrete. The aim of the project is to define whether or not measures have to be taken to repair concrete structures after small fires and at long distances downstream from large fires in tunnels. If the durability is affected the costs and consequences of not repairing and refurbishing after the fire can potentially be very high especially after a fires in very long tunnel.

  • 34.
    Albrektsson, Joakim
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
    Jansson, Robert
    Silfwerbrand, Johan
    CBI .
    Assessment of fire exposed concrete structures2012Inngår i: Symposium 2012, 2012, 619-622 s.Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Annually, several concrete structures, such as buildings, bridges, parking garages and tunnels are exposed to fires. An assessment is then necessary to decide whether the structure can be repaired or needs to be replaced. In a recent research project, recommendations for assessments of fire exposed concrete structures have been developed. The recommendations are based on a literature survey, results from an experimental study, where ultrasonic measurements, microscopy, Digital Image Correlation (DIC) measurement on loaded core samples were used and practical experience of real post-fire structural assessments. A refined assessment of the fire damage is obtained by combining these test methods.

  • 35.
    Albrektsson, Joakim
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Betongbyggnad.
    Jansson, Robert
    Silfwerbrand, Johan
    CBI .
    Durability of fire exposed concrete cover considering non-linear thermal gradient, boundary effecs and polypropylene fibresManuskript (preprint) (Annet vitenskapelig)
  • 36. Alev, Ullar
    et al.
    Eskola, Lari
    Arumägi, Endrik
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Konstvetenskapliga institutionen.
    Jokisalo, Juha
    Donarelli, Anna
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Konstvetenskapliga institutionen.
    Siren, Kai
    Broström, Tor
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Konstvetenskapliga institutionen.
    Kalamees, Tango
    Renovation alternatives to improve energy performance of historic rural houses in the Baltic Sea region2014Inngår i: Energy and Buildings, ISSN 0378-7788, Vol. 77, 58-66 s.Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper analyses renovation alternatives to improve energy performance of historic rural houses in three countries (Estonia, Finland, Sweden) in the Baltic Sea region (cold climate). The study was conducted by a combination of field measurements and simulations. Indoor climate, typical houses and structures as well as the current condition and need for renovation were determined by field measurements. Based on field measurements, indoor climate and energy simulation models were validated and used to calculate energy use for different renovation measures. Energy renovation packages were calculated for different scenarios (minimal influence on the appearance of the house, improvement of thermal comfort, improvement of building service systems) for different energy saving levels. The analysis showed that the improvement of building service systems and the energy source holds the largest energy saving potential. The building envelope of old rural houses needs improvement also due to high thermal transmittance and air leakage. The insulation of the external wall has the largest single energy saving potential of the building's envelope. The results show how energy savings depend on energy saving targets, typology of the building, thermal transmittance of original structures, and building service systems. (C) 2014 Elsevier B.V. All rights reserved.

  • 37.
    Alexandersson, Anders
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Gynne, Sven
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Byggnadsteknik.
    Ekonomisk utvärdering av betonggjutformar2007Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    This report will try to evaluate the use of rented concrete casting moulds, which are used to build walls and system of joists. The evaluation is only examining the economical aspects.

    The cost of using concrete casting moulds is a big part of the total production expenses. Therefore it is important that the calculated price not exceeds the final costs of the casting moulds. The calculated price is the price used in the process of making an offer.

    The evaluation consists of a comparison of the calculated price and the final costs for three building projects. It also evaluates the exploitation of the concrete casting moulds for each project.

    The report is made by Sven Gynne and Anders Alexandersson at School of Engineering, Jonkoping University, in cooperation with PEAB Jonkoping. The evaluation is strictly based on the calculated price and final cost of rented concrete casting moulds, only the moulds themselves, not the labour costs.

    Educational visits have been made to the three projects gathering facts. The conclusions we have drawn are that the difference between the calculated price and the final costs are considerable, especially one project have a greater difference than the others. The reasons for that are among other things tight building ground and a complicated building construction.

  • 38.
    Alfredsson, Patrik
    et al.
    Karlstads universitet, Fakulteten för teknik- och naturvetenskap.
    Haeffner, Fredric
    Karlstads universitet, Fakulteten för teknik- och naturvetenskap.
    Åtgärdsförslag för erosionsskador i Kölaälv2006Independent thesis Basic level (professional degree), 15 poäng / 22,5 hpOppgave
  • 39.
    Allard, Ingrid
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
    Achieving building energy performance: requirements and evaluation methods for residential buildings in Sweden, Norway, and Finland2015Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Building energy performance has always been important in the cold climate of Sweden, Norway and Finland. To meet the goal that all new buildings should be nearly zero-energy buildings by 2020, set in the EU directive 2010/31/EU [1] on the energy performance of buildings (EPBD recast), the building sector in Europe now faces a transition towards buildings with improved energy performance. In such a transition, a discussion is needed about the objective of the improvement – why, or to what end, the building energy performance should be improved. The objective of improving building energy performance is often a political decision, but scientific research can contribute with knowledge on how the objectives can be achieved.

    This thesis addresses how the indicators used in the requirements used to achieve building energy performance in Sweden, Norway, and Finland, and the methods used to evaluate these requirements, reflect building energy performance. It also addresses difficulties in achieving comparable and verifiable indicators in evaluations of building energy performance. The research objective has two parts: to review, compare, and discuss (i) requirements and (ii) evaluation methods used to achieve energy performance of residential buildings in Sweden, Norway and Finland. The work in this thesis includes reviews of the requirements used in national building codes and passive house criteria to achieve building energy performance, of methods used to evaluate compliance with such requirements, and of methods used specifically to evaluate the indicator Envelope Air Tightness.

    The results show that different sets of indicators are used to achieve building energy performance in the studied building codes and passive house criteria. The methods used to evaluate compliance with requirements used to achieve building energy performance are also different, but calculation methods are generally more often used than measurement methods. The calculation- and measurement methods used are often simple. A methodology to analyze the deviation between predictions- and measurements of building energy performance (the performance gap) was developed, to investigate the effects of different evaluation methods on different indicators used to achieve building energy performance. The methodology was tested in a case-study. This study indicated that the choice of method affects which parts of the performance gap reflected in the indicators Supplied Energy (see Terminology), Net Energy (see Terminology), and Overall U-value. Among the reviewed methods to evaluate air tightness, the Fan/Blower Door Pressurization is well known and preferred by professionals in the field. The results in this thesis may be useful when choosing indicators and evaluation methods to achieve different objectives of improving building energy performance and in the quest towards comparable and verifiable indicators used to achieve building energy performance.

  • 40.
    Allard, Ingrid
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
    Olofsson, Thomas
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
    Hassan, Osama
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
    Methods for air tightness analysis for residential buildings in Nordic countries2012Inngår i: Methods for air tightness analysis forresidential buildings in Nordic countries, Southampton: WIT Press, 2012, 311-322 s.Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Envelope air tightness is one factor that has impact on the energy performance ofbuildings. The goals of the directive 2010/31/EU, on energy performance ofbuildings, raise the importance of building energy performance analysis in theprocess. Measurements of air tightness can be useful both when evaluatingbuilding energy performance and developing new building techniques. The aimof this paper is to review and evaluate methods to measure air tightness in bothnew and existing residential buildings in Sweden, Norway and Finland, based onan international literature study and a survey. The methods are categorized basedon a number of criteria to determine their suitability in different situations.Advantages and disadvantages of the methods are discussed, as well ascommonly used methods in the three countries. The review shows that thestandard ISO 9972 is used for verification in all three countries, but alternativesexist that might be more suitable in certain situations. Simpler methods are usedin the building process to increase air tightness. To achieve a comparablemeasurement, both common methods and commonly defined units are needed.

  • 41.
    Allard, Ingrid
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
    Olofsson, Thomas
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
    Hassan, Osama A. B.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.
    Methods for energy analysis of residential buildings in Nordic countries2013Inngår i: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 22, 306-318 s.Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    To meet the goals of the directive 2010/31/EU on the energy performance of buildings, the building sector in Europe now faces a transition towards more energy efficient buildings. Research and development of new energy solutions and technology will be necessary for the transition and the importance of analyzing building energy performance increases. This paper aims to review and evaluate different methods that are commonly used to analyze energy performance in residential buildings in Nordic countries, primarily in Sweden, Norway and Finland. A short international review of regulations is also included. The goal is to find commonly used methods and possibilities for the future. The introduced methods are summarized, categorized and compared based on their advantages and disadvantages. Although the three Nordic countries have similar climate conditions and building traditions, the review shows relatively large variations in the definitions of energy performance for residential buildings, as well as variations in how measurements and calculations are used in the methods for energy performance analysis. In the conducted review, methods, or parts of methods, are also found to be used. The methods used to analyze energy performance are found to be more similar than the concepts of energy performance itself in the three countries. These aspects may be considered in further work to develop an international policy practice for energy performance of residential buildings in cold climate.

  • 42.
    Allerbo, Emma
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Waldemarsson, Hanna
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Adobe - Technology of Everybody: Low Cost Housing in Ethiopia2013Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The traditional building techniques in Ethiopia today contain a lot of wood. Because ofdeforestation the forest cover in the country has been decreased. A part of a solution would bethe exclusion of wood in construction and then the adobe technology is a good alternative. Adobe technology involves blocks made from local soil that mixed with water and straw asreinforcement. The sundried blocks can be bricked up to walls. As mortar the same wetmixture can be used.

    This report contains analyzed soil characteristics in the high altitude located Asella region todetermine its suitability for adobe blocks. The design of a kindergarten in Alem Maya is alsocarried out.

  • 43.
    Allertz, Erik
    et al.
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggteknik och design.
    Hjelmar, Tobias
    KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Byggteknik och design.
    Kvalitetssäkring av material och tjänster inom byggentreprenadbranschen2011Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    Quality is the key to a well executed product or service. The construction industry hasn’t highlighted the quality in recent times which have contributed to the construction industry receiving much criticism in the field. The public sees it as an offhanded industry where errors and delays are common.The reason for this is considered to be primarily the lack of time, constant pressure to reduce costs and skills and the ability to communicate between the parties about what the correct quality really means. The industry has begun to realize that it must start setting clearer standards and that there are great opportunities for improvement.This report will give Peab an opportunity to develop their quality work. The report highlights Peab residential area of Stockholm market position with the current quality of subcontractors and suppliers. It also provides suggestions on how Peab in a better way can work with quality and with this becoming a more competitive player in the market. The conclusions that can be drawn from this study is that Peab is aware of the problem and has begun work on improvements to enhance quality of work. Peab, for example, developed tools for gathering experience. Unfortunately these methods were used poorly and not to the degree that is required. Peab also works with partnering, based on long term business relationships. Correct use of partnering increases the chances of higher quality in the projects. Concrete proposals for improvements that this report highlights include higher standards in the procurement process, dare make demands on the quality of subcontractors and suppliers, learn from the mistakes made and disseminate the knowledge within the Group and work with long-term business relationships in which partners can develop one another .

  • 44.
    Almberg, Stina
    et al.
    Högskolan i Gävle, Akademin för teknik och miljö.
    Michel, Gabriella
    Högskolan i Gävle, Akademin för teknik och miljö.
    Analys av energianvändningen i kvarteren Carolina och Jenny: en fallstudie2010Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    An energy study has been performed on two blocks in an area called Gävle Strand. The buildings are owned by a tenant-owner’s association called brf Carolina and were built by the company Skanska 2008. The builder as well as brf Carolina are pussled by the fact that electricity use is higher than expected while heating is less. Skanska is also very interested in finding out how much heat recovery from stale exhaust air through a geo-thermal heat pump is contributing to the general heating requirement and energy balance in four out of the ten buildings located on the properties.

    To find possible answers to the higher electricity use a literature survey on user behaviour was conducted. Simulations were executed in the energy simulation program BV2 testing the efficiency of a mechanical ventilation system with fans dispatching the used stale air with heat recovery through the geo-thermal heat pump in comparison to a HRV-system. As BV2 can’t simulate heat pumps its impact was instead calculated manually and added to the result from BV2.

    The result show that there are significant differences in both water and electricity use between households. The mean value in brf Carolina is also higher for both water and electricity use than the typical pattern value most commonly used in energy simulations for new buildings. The simulations and calculations show that a HRV-system is practically equal to the system chosen for these buildings. The geo-thermal heat pump make a substantial contribution to the heating requirements but also increases the electricity use in comparison to the HRV-system.

    The buildings over all have a good energy performance. The chosen heat recovery system is working well. If the source for energy is also valued a HRV-system is still preferable since it requires less electricity.In regards to user behaviour the under floor heating installed in the bathrooms and operated by the occupants is very likely to have a substantial impact on the higher than average electricity use. There are however many other factors that could have an impact on energy use due to behaviour factors. This is also a factor when varations between households are viewed.

    Key words; energy, energy simulation, user behaviour

  • 45.
    Almblad, Cecilia
    Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriellt och hållbart byggande.
    Stommaterialets klimatpåverkan: En jämförande studie mellan stommaterialen trä och betong ur ett livscykelperspektiv applicerat på en passivhusförskola2017Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
  • 46.
    Almestrand, Lovisa
    Örebro universitet, Akademin för naturvetenskap och teknik.
    Passivhus i Örebro län: Undersökning av marknaden för fastighetsägare2009Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Detta examensarbete syftar till att undersöka vilken kunskap som fastighetsägare har om passivhus samt om det finns någon marknad för detta koncept i Örebro län.

    Miljö- och klimatproblemen i världen blir allt större och ett resultat av detta är den ständigt cirkulerande debatten om passivhus.  Lågenergihus är en nödvändig lösning för att energianvändningen ska kunna minskas, då bostadssektorn står för cirka 40 % av Sveriges totala energianvändning. Passivhus är en utveckling av lågenergihuset som byggs utan konventionellt uppvärmningssystem och har en låg energianvändning. Asplunds Bygg i Örebro bygger nu våren 2009 de första passivhusen i Örebro.

    Examensarbetet inleddes med att fastighetsägare kontaktades och intervjuer bokades. De muntliga intervjuerna genomfördes under en fyra veckors period på respektive fastighetsägares kontor. En egen fördjupning i ämnet gjordes parallellt med intervjuerna genom att studera passivhus i bl.a. litteratur, artiklar och på Internet. Resultatet av intervjuerna sammanställdes, jämfördes och analyserades utifrån syftet med arbetet.

    Fastighetsägarna är positivt inställda till konceptet och anser att energifrågan är viktig, men kunskapen kring passivhus hos vissa är bristfällig. Avslutningsvis konstateras att utifrån resultatet av intervjuerna så verkar det som att det finns en framtida marknad för passivhus i Örebro län.

    Nyckelord: passivhus, lågenergihus, energianvändning, ventilationssystem, värmeåtervinning, tjock isolering.  

  • 47.
    Almqwist, Jonas
    et al.
    Karlstads universitet, Fakulteten för teknik- och naturvetenskap.
    Olsson, Robert
    Karlstads universitet, Fakulteten för teknik- och naturvetenskap.
    Val av fönster med hjälp multikriterieanalys: Forshaga vårdcentral2009Independent thesis Basic level (university diploma), 15 poäng / 22,5 hpOppgave
    Abstract [sv]

    Rapporten är tänkt som ett hjälpmedel vid fönsterprojektering och berör de aspekter som är av intresse vid val av fönster. Målgruppen är Landstingsfastigheter i Värmland (LIV) samt alla som har intresse av ämnet. Huvudsyftet är att förenkla för LIV i deras arbete att välja fönster och att lämna förslag på den bästa fönster-/solskyddslösningen till vårdcentralen i Forshaga.

    Målet med rapporten är att skapa ett verktyg som hjälper LIV att på ett objektivt och enkelt sätt välja sina framtida fönster-/solskyddslösningar.

     

    Med hjälp av en multikriterieanalys (MKA) i samverkan med uppställda mål och syften har en mall arbetats fram, där fönster/solskydd kan utvärderas på ett objektivt sätt. MKA:n fungerar bra vid jämförelse av fönster men inte vid solskydd. Detta eftersom LIV har satt upp tydliga mål och syften för sin solskyddslösning. Därmed har en undersökande metod med hjälp av LIV:s uppställda krav använts som hjälpmedel vid val av solskyddslösning. MKA-metoden tillämpades för att finna det bästa fönstret till vårdcentralen i Forshaga.

     

    Rapporten visar att med LIV:s förutsättningar är den bästa lösningen ett PVC-fönster med isolerglas. PVC-karmen är den lösning som ger lägst U-värde samt kostar minst i sammanhanget. Trots att PVC-fönstret redovisas som vinnare var det inte bäst i alla avseenden. Aluminiumfönstret är genomgående bra och bäst ur säkerhetssynpunkt men tillverkarna har svårt att minska de naturliga köldbryggorna som uppstår i karmen. Lösningarna blir dyra och fönstret är svårt att motivera ekonomiskt när säkerhetskraven är normala. Fönster med trä respektive trä-/aluminiumkarm får också ett genomgående gott betyg. Ur underhållssynpunkt har träkarmen svårt att mäta sig med de underhållsfria alternativen.

     

    Eftersom LIV har tydliga krav och mål uppställda på sina solskyddslösningar och på deras funktion, sorterades många lösningar bort. Skärningspunkten för alla kriterier föll på en fast solavskärmning som inte kräver något underhåll, eller vars funktion förändras av väder och vind. Solavskärmningen bör kombineras med en persienn för att möjliggöra ett gott insynsskydd.

    En slutsats vid val av fönster är att det är viktigt att ha tydliga mål och syften, först när det är färdigställt kan man gå vidare med vilken funktion och krav fönstret/solskyddet bör uppfylla.

  • 48.
    Almssad, Asaad
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper.
    Almusaed, Amjad
    Archcrea Institute.
    Efficient daylighting approach by means of light-shelve device adequate for habitat program in Aarhus City2014Inngår i: International Journal of Smart Grid and Clean Energy, ISSN 2315-4462, Vol. 3, nr 4, 441-453 s.Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The concepts of light shelves consist of windows that have face towards the sun, which receive a vast quantity of energy that could be used for healthy day lighting. This paper debates a main assessment, investigates the optimization of daylight requirement by means of light shelves system. An experimental test was carried out assessing the measurements and lighting simulations of a model of a building in order to elucidate the characteristics of indoor lighting. Light shelf is an architectural element that permits daylight to enter deep into a building. It constitutes an optimal solution for an incorrect building orientation and less sunny days. The essential objective of this study is to highlight the vital role of light shelves in residential buildings in northern Europa where the requirement is to improve the daylight in the interior functional spaces. The main objects of this paper are to investigate the effect of daylight in the interior functional spaces using light shelves, the effect of natural light diffusion in interior space in the period of low daylight season, and glare effect in this field. This paper investigates a procedure for analysing the daylight performance using software habitat function

  • 49.
    Almssad, Asaad
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper.
    Almusaed, Amjad
    Archcrea Institute.
    Green housing: The optimal Solution To Combat The Negative Effects Of Global Climatechange2010Inngår i: 3rd International Conference Palenc 2010 jointly organised with EPIC 2010 & 1st Cool Roofs Conference, University of Athens, Greece , 2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    No Architectural concept is complete without green areas. The vital mission of biophilic architecture is to revised conceptualization of architecture in response to a myriad of contemporary concerns about the effects of human activity. Our earth is warming more rapidly than it has in the past according to the research of scientists. The green building of biophilic architecture combines the interests of sustainability, environmental consciousness, green areas of the large nature, and organic approaches to evolve design solutions from these requirements and from the characteristics of the site, its neighborhood context, and the local microclimate and topography. The biophilic concept provides us with the opportunity to reach extremely low levels of energy consumption by employing high quality, cost-efficient measures to general architectural components - such measures are in turn off advantage to the ecology and economy sector. Our essential task of this research is to make of the green covering a human strategy in urban and architectural manner and to be a human culture with helping of local governments; we can acquire the competent legislation, which protect our life and environment.

  • 50.
    Almssad, Asaad
    et al.
    Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörs- och kemivetenskaper.
    Almusaed, Amjad
    Archcrea Institute.
    Kalil Almusaed, Zaki
    Heat Island Effects Upon The Human Life On The City Of Basrah2007Inngår i: Building Low Energy Cooling and Advanced Ventilation Technologies in the 21st Century: 2nd PALENC Conference 28th AIVC Conference / [ed] M. Santamouris, P. Wouters, Crete island: University of Athens , 2007, 45-47 s.Konferansepaper (Fagfellevurdert)
    Abstract [en]

    After the terrible consequence of the Iraq –Iran war and recently USA attack over Iraq the urban green covering disappeared from large areas of the city, beside the extension of the building over the green areas. The negative effects of this phenomenon over human’s thermal comfort become more perceptive. Today we can observe clearly the negative effect of urban heat island in the center of Basra city, precisely in physical frameworks of the city; we can observe a typical phenomenon with a large negative effect for the period of summer heating that is a natural thermodynamic phenomenon. In the surfaces of physical framework, in the core of day between 12-15 pm, the sun is shining perpendicular above the earth surfaces (framework physic). Consequently the temperature on the earth surfaces increases surprisingly up to 60 ºC. Therefore there occurs a difference of temperature between the earth surfaces and cosmos space which conduce to generate a gigantic colonization of air from the earth surface to cosmos space, such resultants of this phenomenon is no air zones and under pressure on earth surfaces, with the intention of making a nasal bleeding, which seeking for a medical intervention aide.

1234567 1 - 50 of 2869
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf