Effect of Nonlinear Seismic Torsion on the Performance of Skewed Bridge Piers |
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Authors: | Kazuhiko Kawashima Paiboon Tirasit |
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Affiliation: | 1. Department of Civil Engineering , Tokyo Institute of Technology , Tokyo, Japan kawashima.k.ae@m.titech.ac.jp;3. Department of Civil Engineering , Tokyo Institute of Technology , Tokyo, Japan |
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Abstract: | This article presents an analytical investigation on the effect of seismic torsion on the performance of a skewed bridge. A nonlinear torsional hysteretic model developed by the authors is applied to idealize the torsional behavior of bridge piers. Deterioration of the torsional strength of piers due to combined flexure is considered and deterioration of flexural strength due to torsion is not taken into account. The effects of pounding between deck and abutments, cable restrainers, and damage of bearing supports are also included in analysis. It is found that the eccentric impact force due to lock of bearing movement results in extensive torsion in piers. |
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Keywords: | Bridges Torsion Seismic Design Dynamic Response Analysis Columns |
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