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Structural Engineering and Mechanics Volume 61, Number 3, February10 2017 , pages 427-436 DOI: https://doi.org/10.12989/sem.2017.61.3.427 |
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Experimental and analytical behavior of a prestressed U-shaped girder bridge |
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Xun Wu and Hui Li
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| Abstract | ||
| This paper presents an experimental and analytical investigation on the behavior of a U-shaped girder subjected to operation, cracking and ultimate loads. A full-scale destructive test was conducted on a U-shaped girder to study the cracking process, load-carrying capacity, failure mechanism and load-deformation relationships. Accordingly, the tested U-shaped girder was modeled using ANSYS and a non-linear element analysis was conducted. The investigation shows that the U-shaped girder meets the specified requirements of vertical stiffness, cracking and ultimate load capacity. Unfavorable torsional effect is tolerable during operation. However, compared with box girders, the U-shaped girder has a more transverse mechanical effect and longitudinal cracks are apt to occur in the bottom slab. | ||
| Key Words | ||
| rail transit; U-shaped girder; experiment; finite element analysis; longitudinal crack | ||
| Address | ||
| Xun Wu and Hui Li : Department of Bridge Engineering, Tongji University, 1239 Siping Road, Shanghai, China | ||