非规则梁桥伸缩缝处的碰撞对地震反应的影响

Effect of pounding at expansion joints on seismic response of irregular girder bridges

针对非规则梁桥在地震作用下伸缩缝处的碰撞现象,在建立考虑双边碰撞效应的简化动力分析模型的基础上,采用非线性地震反应时程分析方法,研究了纵向地震作用下非规则梁桥伸缩缝处的碰撞效应,并分析比较了双边碰撞与单边碰撞对桥梁结构位移的影响,研究结果对同类型的非规则梁桥的抗震设计具有一定的参考价值。

Based on the pounding phenomenon at expansion joints of irregular girder bridges during earthquakes, a simplified analytical model that considers the effects of two-sided collision was method of determining the nonlinear seismic responses, the pounding effects seismic responses of irregular girder bridges were studied, and the influences presented. With the time history analysis of adjacent girders at expansion joints on on two-sided and one-sided pounding on structural displacements were investigated. The results from the present study may serve as a reference base for seismic design of irregular girder bridges