金水路打通工程高架桥梁抗震分析

Seismic Analysis of Elevated Bridge in Jinshui Road Opening- up Project

采用反应谱对高架桥在墩底承台间是否设置横向连系梁进行了纵、横向的地震反应对比分析。计算结果表明:采用群桩或者通过设置横系梁对承台进行拉结,能显著减小桥梁结构的横向位移,有效改善桥梁的抗震性能;由于条件限制无法设置承台间的横系梁时,在6度区,桥梁的抗震能力也能满足规范的相关要求。为设计提供了理论依据。

The response spectrum is used to compare and analyze the vertical and horizontal seismic responses of the elevated bridge whether or not to install the transverse coupling beam among the base slabs of pier bottom. The calculation result shows that the use of group pile or the installation of transverse coupling beam to pull can obviously decrease the lateral displacement of beam structure, and effectively improve the seismic performance of bridge. When the transverse coupling beam is hard to install among base slabs because of condition limitation, the seismic capacity of bridge can also satisfy the relative requirement of the standard in the six- degree zone in order to provide the theoretic basis for the design.