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Moderna trä- och betongstommar i flerbostadshus: En teknisk jämförelse av ett fyravåningshus med två stomalternativ.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
2012 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Modern timber and concrete structures in apartment buildings : A technical comparison of a four-storied building with two structural options. (English)
Abstract [sv]

Målet med detta arbete var att belysa skillnaderna mellan ett fyravåningshus med trä- respektive halvprefabricerad betongstomme ur ett tekniskt perspektiv för att utröna vilket stomalternativ som är att föredra.

Faktorer som belystes var:

  • Tjocklekar på bärverksdelar
  • Längsta möjliga spännvidder
  • Installationsmontering
  • Elementmontering
  • Grundstorlek
  • Ljudisolerande förmåga
  • Risk för fuktskador
  • Branddimensionering
  • Projekteringskomplexitet

Bygghandlingar från ett befintligt flerbostadshus med trästomme erhölls och analyserades, och ett hus med likvärdig stomme av betong projekterades.

Bärverket med halvprefabricerad betong dimensionerades efter rådande Eurokoder och detaljer utformades enligt gällande lagar och regler samt erkänd branschstandard.

Ur de tekniska perspektiv som avhandlats i denna rapport väger fördelarna med betong något tyngre än träalternativets fördelar trots att egenskaperna i vissa hänseenden är mycket lika.

Betongalternativet ger stora fördelar vad gäller brand och ljud och är samtidigt enklare att projektera, medan trä har sina fördelar i montering och grundläggning. Att välja en stomme av trä till ett flerbostadshus verkar också ha fördelar i de icke avhandlade aspekterna, t.ex. miljö och arbetsmiljö.

För att uppfylla ljud-, brand- och fuktkrav i ett trähus krävs det avancerade byggsystem som innebär stor komplexitet i projekteringen vilket kräver ett nära samarbete mellan träprojektör och fabrikör.

 

Abstract [en]

The goal with thisdegree project was to highlight the differences between an apartment building with a timber frame and partly prefabricated concrete frame from a technical point of view to determine which alternative that is preferable.

Highlighted factors were:

  • Thicknesses of load-bearing parts
  • The maximum length of floor structures
  • Assembly of installations
  • Assembly of the frame-parts
  • Sound-insulating ability
  • Moisture problems
  • Dimension of fire-protection
  • Project-complexity

Construction documents from an existing apartment building with a timber frame were obtained and analyzed, and a concrete frame house with similar abilities was projected.

The half-prefabricated concrete construction was designed with current eurocodes and details were designed according to laws, regulations and recognized industry standards.

From the technical perspective that has been discussed in this report, the advantages with concrete frames are greater than the timber alternative, despite the fact that they in some aspects are very similar.

The concrete option provides significant benefits in terms of fire and sound abilities and it is also easier to design, while the timber option has its advantages in assembly and foundation. Choosing a frame of timber to an apartment building also seems to have advantages in the environmental and work environmental aspects.

To fulfill the sound, fire and moisture requirements which are needed in a timber house it requires advanced building system that involves complexity of the design which requires close cooperation between the constructional engineer and the manufacturer.

 

Place, publisher, year, edition, pages
2012. , 27 p.
Keyword [en]
concrete frame, timber frame, concrete construction, timber construction, framework alternatives
Keyword [sv]
betongstomme, trästomme, betongkonstruktion, träkonstruktion, stomalternativ
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-102025OAI: oai:DiVA.org:kth-102025DiVA: diva2:550356
External cooperation
Konkret Rådgivande Ingenjörer i Stockholm AB
Subject / course
Constructional Engineering and Design
Educational program
Bachelor of Science in Engineering - Constructional Engineering and Design
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-09-10 Created: 2012-09-06 Last updated: 2013-03-07Bibliographically approved

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