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Crack formation in two segmentally constructed balanced cantilever box-girder bridges
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Concrete Structures.ORCID iD: 0000-0003-3586-8988
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Concrete Structures.
2012 (English)In: fib Symposium 2012: Concrete Structures for Sustainable Community - Proceedings, 2012, 151-154 p.Conference paper, Published paper (Refereed)
Abstract [en]

Newly constructed box-girder cantilever bridges with continuous spans, revealed extensive cracking in the webs after only two years of service. Continuous spans are complicated to design and secondary restraint moments due to creep, shrinkage and thermal effects develop at the connections. To explain the cause of cracking, the segmental construction sequence was analysed using non-linear finite element modelling, including the time-dependent effects of the evolution of the elastic modulus, shrinkage, creep and relaxation. The results showed that the webs cracked during the construction phase, due to tensioning of the tendons in the flanges. Seasonal temperature variations lead to further crack development.

Place, publisher, year, edition, pages
2012. 151-154 p.
Keyword [en]
Balanced cantilever, Cracking, Non-linear finite elements, Segmental construction
National Category
Infrastructure Engineering
Identifiers
URN: urn:nbn:se:kth:diva-131324Scopus ID: 2-s2.0-84883351634OAI: oai:DiVA.org:kth-131324DiVA: diva2:655942
Conference
fib Symposium 2012: Concrete Structures for Sustainable Community; Stockholm; Sweden; 11 June 2012 through 14 June 2012
Note

QC 20131014

Available from: 2013-10-14 Created: 2013-10-14 Last updated: 2017-06-21Bibliographically approved

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