双向耦合效应对FPS隔震桥梁地震响应的影响

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (2) : 119-123.

论文

双向耦合效应对FPS隔震桥梁地震响应的影响

吴陶晶; 李建中; 管仲国

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BI-IONAL EFFECT ON SEIDIRECTSMIC RESPONSES OF ISOLATED BRIDGES WITH FRICTION PENDULUM BEARINGS

WU Tao-jing; LI Jian-zhong; GUAN Zhong-guo

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文章历史 +

摘要

利用两正交水平方向力的作用条件下FPS支座非线性动力行为的双向耦合弹塑性恢复力数学模型，针对一典型大跨度FPS隔震连续梁桥，对比了在墩高、球面半径和支座屈服强度等参数变化的情况下，考虑和忽略FPS支座恢复力的双向耦合作用时桥梁的非线性时程响应结果。研究表明这种双向耦合作用对隔震桥梁的地震响应有着重要的影响，如果忽略双向耦合作用，会大大低估支座变形的峰值响应，这对隔震桥梁设计是不利的。

Abstract

The bi-directional coupled interaction of FPS under two horizonta1 orthogonal directional excitations was investigated. Based on a nonlinear numerical model of a typical continuous long span bridge isolated with FPS, the seismic responses taking into account or ignoring the bi-directional coupled interaction of bearing restoring force were compared at different levels of parameters such as pier height, yield strength and bearing radius. The results show that the bi-directional coupled interaction has considerable effects on the seismic responses of the isolated bridge. If these effects are ignored, the peak bearing displacements will be greatly underestimated, which is crucial for isolated bridges from the design point of view.

导出引用

吴陶晶;李建中;管仲国. 双向耦合效应对FPS隔震桥梁地震响应的影响[J]. 振动与冲击, 2011, 30(2): 119-123

WU Tao-jing;LI Jian-zhong;GUAN Zhong-guo. BI-IONAL EFFECT ON SEIDIRECTSMIC RESPONSES OF ISOLATED BRIDGES WITH FRICTION PENDULUM BEARINGS[J]. Journal of Vibration and Shock, 2011, 30(2): 119-123