大跨度系杆拱桥减隔震设计

Seismic Design of Long-span Bowstring Arch Bridge

摘要:

以某大跨度系杆拱桥为背景，采用Midas /Civil通用有限元分析软件建立三维有限元模型，对比分析了多种工况下的地震响应，重点讨论了采用摩擦摆减隔震支座+黏滞阻尼器组合减隔震体系后的减震效果。结果表明:采用此减隔震体系能有效减小固定墩地震响应，上、下部结构均在安全范围内。

Abstract:

With a long-span bowstring arch bridge as the background, Midas / Civil universal finite element analysis software is used to establish a three-dimensional finite element model. The seismic response is compared and analyzed under various working conditions. The damping effect after the use of the combined damping and isolation system of friction pendulum seismic isolation bearing + viscous damper is specially discussed. The results show that this combined damping and isolation system can effectively reduce the seismic response of fixed pier, and the superstructure and substructure are all within the safe range.