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Cracking Mechanism and Simplified Design Method for Bottom Flange in Prestressed Concrete Box Girder Bridge
Dept. of Civil Engineering, Zhejiang Univ., Hangzhou, Zhejiang, China.
2011 (English)In: Journal of Bridge Engineering, ISSN 1084-0702, E-ISSN 1943-5592, Vol. 16, no 2, 267-274 p.Article in journal (Refereed) Published
Abstract [en]

Serious cracking has occurred frequently in the bottom flange of box girders during construction in recent years. This paper aims at studying the cracking mechanism and countermeasures. The stress field in the bottom flange associated with the bottom continuity tendon is presented, and the propagation of cracks during tensioning is simulated by nonlinear analysis according to the actual construction sequence. A cracking mode, which is not easy to detect in field investigation, is illustrated through numerical and theoretical study. It is caused by the deficient shear strength of the bottom flange attributed to the void in tendon ducts. Based on numerical results and field investigation, four types of cracking in the bottom flange are proposed and discussed, and a simplified design method is recommended for control of cracking.

Place, publisher, year, edition, pages
2011. Vol. 16, no 2, 267-274 p.
National Category
Transport Systems and Logistics
Identifiers
URN: urn:nbn:se:kth:diva-116083DOI: 10.1061/(ASCE)BE.1943-5592.0000151ISI: 000287879700010OAI: oai:DiVA.org:kth-116083DiVA: diva2:588665
Note

TSC import 2256 2013-01-15. QC 20130211

Available from: 2013-01-15 Created: 2013-01-15 Last updated: 2017-12-06Bibliographically approved

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