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Title |
Seismic Evaluation of Supporting Reactions for the Bridge with Various Curvatures and Skew Angles
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Authors |
박성렬(Seong-Ryel Park) ; 김연태(Yun-Tae Kim) ; 김상철(Sang-Chel Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.1.067 |
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Keywords |
부반력 ; 지진하중 ; 곡선교 ; 곡선반경 ; 편구배 ; 사각 Negative reaction force ; Seismic load ; Curved bridge ; Radius of curvature ; Gradient ; Skew angle |
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Abstract |
This study has addressed to evaluate the effects of radius of curvature and skew angle on the negative reaction in a plate girder bridge with LRB (Lead Rubber Bearing) supports. As analytical parameters, various radius of curvatures and skew angles were selected and two seismic loads of El-Centro and artificial earthquakes were applied to the bridge in the longitudinal and transverse directions. As results of 3D analysis, the possibility of negative reaction is shown at the part of acute angle and inner side of the curved bridge, and becomes increased when seismic load is applied in the transverse direction. In addition, the occurrence of negative reaction is found to be increased as both radius of curvature and skew angle decrease, which means that curved bridge has higher possibility of negative reaction than straight one. Conclusively, all of earthquake wave, gradient, radius of curvature and skew angle should be considered together to investigate the possibility of negative reaction at the bridge support subject to seismic load.
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