Practical crack control during the construction of precast segmental box girder bridges |
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| Authors: | Do-Young Moon Jongsung Sim Hongseob Oh |
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| Affiliation: | aDepartment of Civil and Environmental Engineering, Hanyang University, 1271 Sa1-dong, Ansan 425-791, South Korea;bDepartment of Civil Engineering, Jinju National University, 150 Chilam-dong, Jinju, Kyeongnam 660-758, South Korea |
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| Abstract: | Cracks that occurred in the bottom slab of a precast segmental bridge were investigated through a construction sequence analysis, which revealed that the cracks were caused by excessive deformation during temporary post-tensioning while joining the segments. In addition, a parametric study was performed to evaluate the effects of the prestressing sequence, bottom slab thickness, and position of the prestressing anchors. The structural behavior of the girder sections was greatly affected by the thickness of the bottom slab and the position of prestressing anchors, but not by the prestressing sequence. Based on the results, a construction method that prevents the cracks is proposed. |
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| Keywords: | Construction sequence analysis FE analysis PC box girder Precast segmental bridge Structural behavior Temporary prestressing |
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