高墩曲线桥梁地震碰撞响应分析

Analyzing the seismic collision response of high pier curved bridge

在强烈地震作用下,巨大的碰撞力能导致支座破坏甚至落梁,目前,对于桥梁伸缩缝碰撞研究较少,尤其对于高墩曲线梁桥,其碰撞方向不确定,碰撞行为更复杂。文中讨论高墩曲线桥两联间的碰撞分析动力模型的建立方法,采用时程分析法,针对墩高、曲率半径、伸缩缝间隙、临梁周期比等参数对碰撞响应的影响规律进行分析,讨论产生碰撞的最不利情况。

For a strong earthquake, the huge collision force may also lead to bearing the support damage or even the beam damage. At present, few studies of bridge expansion joints collision at home and abroad have been made, especially for high pier curved bridge with uncertain the direction of collision and complex collision behaviors. Therefore, it is worthy of further study. Discussion is made on the establishment of a dynamic model of collisions between the two high piers of curved bridge, coupled with the parameters of the time history analysis method, the height of different piers, radius of curvature, expansion joint gap, and temporary beam cycle. The most unfavorable case of a collision is discussed.