连续刚构桥地震反应分析

根据功能要求、使用情况等确定抗震设防标准及设防目标,对拟建连续刚构桥建立全桥整体分析模型,选定不同概率水准的参数,采用纵向+竖向、横向+竖向的方式作为地震动输入,以寻求结构在纵、横向地震作用时各桥墩的内力分布规律,综合分析评价桥梁抗震性能.反应谱法计算结果表明:该桥具有足够的抗震能力,可以满足预期的设计性能.建议应更深入开展基于性能的抗震理论研究,并逐步将该方法应用于桥梁抗震设计.

Seismic Response Analysis on a Continuous Rigid-Frame Bridge

According to the functional requirements and service condition, seismic fortification criterion and target are determined. The whole analysis model of the continuous rigid-frame bridge is built. Parameters at different probability are selected, load combination with longitudinal, transverse and vertical earthquake motion are input, in order to find internal force distribution and evaluate the anti-seismic performance of this bridge. Results obtained from response spectrum method show that the bridge can offer enough anti-seismic bearing capacity and meet the expected design goal. The performance-based seismic design should be deeply developed and gradually applied in bridge seismic design.