摘要
采用非线性时程分析方法,对西部地震区高墩桥梁支座的合理选型进行了研究。比较研究的支座型式包含盆式橡胶支座、四氟滑板支座、板式橡胶支座、铅芯橡胶支座。地震动峰值加速度分别采用了0.15 g和0.20 g。非线性时程分析中考虑了支座的力-位移关系,以及桥墩潜在塑性铰的动力反应。研究结果指出,从抗震角度来看,西部地震区高墩桥梁支座的选型原则是尽量提高结构的刚度,减小梁体位移和墩顶位移。
The appropriate types of bearings installed on high pier bridges in seismic regions in the west of China are studied by means of nonlinear time history analysis. Pot-type elastomeric bearing, friction bearing, laminated rubber bearing and lead rubber bearing are considered in this study. 0.15 g and 0.20 g are adopted as the peak acceleration. In nonlinear time history analysis, the force-displacement of bearings and dynamic response of plastic hinges in piers are considered. In the aspect of earthquake resistance, the principle about high pier bridge bearing selection in seismic regions in the west of China, which is to try to increase the rigidness of structure and to decrease the displacements of the beam and the top pier, is demonstrated as the result.
出处
《公路》
北大核心
2007年第11期27-31,共5页
Highway
关键词
地震
桥梁
高墩
支座
塑性铰
seismic
bridge
high pier
bearing
plastic hinge
