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Förspända betongelement: Dimensionering enligt Eurokod 2
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2013 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Prestressed concrete : Design in accordance with Eurokod 2 (English)
Abstract [sv]

Den här rapporten redovisar examensarbetet vars huvudsyfte var att förstå teori och beräkningsgången bakom förspända betongelement samt att jämföra den med teorin för slakarmerade betongelement. Arbetet valdes eftersom inga kurser under studietiden har beaktat denna typ av utformning samt eftersom tillämningen av kunskapen inom området är stor ute i arbetslivet. Arbetet slutfördes genom inläsning av litteratur samt handledning.

Det visade sig efter arbetet var slutfört att några delar av teorin och beräkningsgången bakom förspända betongelement var lik den som används vid slakarmerade betongelement, dock existerade även många skillnader. Likheterna erhålls bland annat vid beräkningarna av moment- och tvärkraftskapaciteterna. Skillnaden är att många extra steg måste utföras vid dimensioneringen, steg som till största del bara av olika kontroller, vilka utfördes bland annat vid dimensioneringen av tillverkningsprocessen och i brottgränstillstånd.

Slutligen kunde det konstateras att förspända betongelement har många fördelar, vilka bland annat är att större spännvidder, mindre dimensioner på konstruktionerna samt mindre deformationer kan erhållas. Dock så krävs en större mängd beräkningar vid förspända än för slakarmerade betongelement. 

Abstract [en]

The objective of this thesis is to understand the theory and learn the calculation behind prestressed concrete elements and to compare it with the theory of ordinary reinforced concrete elements. This thesis work was chosen in order to promote the study of prestressed concrete and because it´s broad application in civil engineering. The worked was completed by reading literature and guidance.

It turned out after the work was completed that some parts of the theory and calculation behind prestressed concrete was similar to that used in the ordinary reinforced concrete. However, there were also many differences that existed. Some of the similarities are obtained when the capacities of moment and shear are calculated. The differences is that many extra steps are required when the design are performed, steps who for the most part due to different controls and are required to be performed to ensure the safety of the design. The controls are to be performed, among other, in the design of the manufacturing process and in the ultimate limit state.

Finally, it is found that prestressed concrete elements have many benefits, which includes larger spans, smaller dimensions for structures and that smaller deformations can be obtained. However, it will require a larger amount of calculations as compared to ordinary reinforced concrete.

Place, publisher, year, edition, pages
2013. , 73 p.
Keyword [en]
Prestressed, construction, relaxation, elongation
Keyword [sv]
Förspänd, konstruktion, avspänning, töjning
National Category
Other Engineering and Technologies not elsewhere specified Other Civil Engineering
Identifiers
URN: urn:nbn:se:umu:diva-73318Local ID: BY1305OAI: oai:DiVA.org:umu-73318DiVA: diva2:630924
External cooperation
AB Strängbetong
Educational program
Bachelor of Science Programme in Civil Engineering
Supervisors
Examiners
Available from: 2013-06-20 Created: 2013-06-19 Last updated: 2013-06-20Bibliographically approved

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Förspända betongelement - Dimensionering enligt Eurokod 2(1590 kB)1491 downloads
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Other Engineering and Technologies not elsewhere specifiedOther Civil Engineering

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