行波激励下大跨度连续刚构桥的地震反应分析  

Seismic response analysis for long-span continuous rigid-framed bridges under excitation of traveling waves

作　　者：李忠献[1] 史志利[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《地震工程与工程振动》2003年第2期68-76,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金资助项目(50178047)

摘　　要：地震输入问题一直是工程结构抗震研究所关注的焦点。大跨度桥梁结构各地面支承距离较大、延伸较长,进行地震反应分析时应考虑地震波有限波速传播所引起的行波效应。本文基于行波激励下大跨度桥梁地震反应分析的方法,对某一大跨度的四跨预应力混凝土连续刚构桥进行了行波激励下地震反应的数值模拟,并与一致地震激励下的计算结果进行了比较,对该四跨预应力混凝土连续刚构桥的工程建设具有直接的指导意义。Earthquake input pattern has become a principal focus in the research on earthquakeresistance of engineering structures. For longspan bridges, the more rational method for seismic response analysis should be performed considering the traveling wave effect. In this paper, the methods of seismic response analysis for longspan bridges considering traveling wave effect are established, and the seismic responses of a fourspans continuous rigidframed bridge is numerically simulated considering traveling wave effect and compared with the result under the coincident earthquake excitation, which presents direct instruction for engineering construction of the bridge.

关 键 词：工程结构 桥梁 地震反应分析 地震波 行波效应 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]