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FEM-analysis of a concrete dam in northern Sweden
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0002-8152-6092
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2015 (English)In: Association of State Dam Safety Officials, Dam Safety 2015, Association of State Dam Safety Officials , 2015Conference paper (Refereed)Text
Abstract [en]

Krångfors is a concrete dam located in northern Sweden that was constructed in three stages from 1928 to 1973. This expansion in different stages resulted in a complicated structural design. Extensive cracks have been noticed in parts of the structure. Two main hypotheses for the cause of these cracks were initially established; 1) alkali-silica reaction (ASR) and 2) large temperature variations in the structure. Petrographic analyses of concrete cores showed that the concrete ballast consisted of greywacke with potential for ASR. However, accelerated testing of concrete cores showed that the potential for expansion due to ASR was limited. To analyze the effect from temperature variations, three dimensional FEManalyses were performed. The results from these FEM-analyses are the main focus of this paper. These analyses showed that adding the annual temperature variation and possible shrinkage to the FEM-model gave results that could explain the observed cracks.

Place, publisher, year, edition, pages
Association of State Dam Safety Officials , 2015.
Keyword [en]
Concrete dams, Concrete testing, Concretes, Cracks, Dams, Safety engineering, Temperature, Temperature distribution, Accelerated testing, Alkali-silica reaction, Annual temperatures, Different stages, Large temperature variations, Northern sweden, Petrographic analysis, Temperature variation, Structural design
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-181538ScopusID: 2-s2.0-84949883698OAI: oai:DiVA.org:kth-181538DiVA: diva2:909525
Conference
Dam Safety 2015 Conference, 13 September 2015 through 17 September 2015
Note

QC 20160307

Available from: 2016-03-07 Created: 2016-02-02 Last updated: 2016-08-16Bibliographically approved

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Johansson, FredrikMalm, Richard
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