独柱墩连续梁桥横向减震分析

Transverse Vibration Analysis of Single Column Pier of Continuous Beam Bridge

独柱墩连续梁桥在城市中常被采用,为使其尽量少地影响地面交通,桥墩墩径应受到限制,桥梁横桥向支座间距减小,地震作用下其稳定性较差.本文应用MIDAS CIVIL有限元软件通过对桥梁上部结构、支座、下部结构的模拟,建立了动力模型.对桥梁采用不同支座进行动力时程分析,计算分析结果表明,在E2地震荷载作用下,铅芯橡胶支座能有效降低地震力对桥墩的横向受力影响.

Single column pier of continuous beam bridge often be adopted in cities, in order to minimize the ground traffic, the pier diameter should be restricted, the seat spacing decreases of bridge transverse, its poor stability under earthquake. The paper simulation of the bridge superstructure, substructure, bearing based on finite element software ＂Midas Civil＂, set up the dynamic model. On the bridge using dynamic time history analysis with different bearings, the calculation results show that, under the E2 action of earthquake, lead rubber bearing can effectively reduce the seismic forces on piers transverse.