上承式拱桥阻尼支撑加固抗震性能分析

Research on Seismic Behavior of Top-bear Arch Bridge with Viscoelastic Damping Braces

针对上承式拱桥抗震加固的工程需要,提出了加设阻尼支撑的减震控制方案,在结构中增加集中阻尼来减小地震响应.通过尼木大桥加固工程中采用加设粘弹性阻尼支撑方案的有限元地震响应分析,表明粘弹性阻尼支撑能够显著减小拱平面内的位移响应,是一种有效的减震控制方案.

This paper proposes a new method of structure control that to set damping braces in a top - bear arch bridge. Lumped damping can be introduced to structures to reduce seismic response. The FEM analysis of Nimu bridge which is braced with viscoelastic dampers had done. The results show that the viscoelastic damping braces can remarkably decrease displacement within the arc plane, which is an efficient structure control method.