深水连续刚构桥地震响应分析  

Analysis of seismic responses of continuous rigid-frame bridge in deep water

作　　者：刘振宇[1] 李乔[1] 赵灿晖[1] 蒋劲松[2] 

机构地区：[1]西南交通大学桥梁系,四川成都610031 [2]四川省公路规划勘察设计研究院,四川成都610041

出　　处：《地震工程与工程振动》2009年第4期119-124,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50678156);交通部西部交通建设科技项目(2003-318-78011)

摘　　要：本文探讨连续刚构桥在深水中地震响应的特性。首先建立了地震作用下深水桥梁的运动方程,简要阐述了该运动方程的求解方法,应用该运动方程,对一座桥墩淹没水深168m的连续刚构桥进行了地震响应分析,考察了在纵向、横向激励作用下桥墩的内力响应和位移响应特征,探讨了矩形空心截面桥墩内域水、外域水对桥墩地震响应的影响,结果表明,由于墩-水相互作用,桥墩的位移和内力响应均有明显增大,对于矩形空心墩,内域水和外域水的影响应同时计入。The responses of continuous rigid-frame bridge in deep water subjected to seismic ground motion are discussed. Firstly, the motion equation of bridge in deep water subjected to seismic ground motion is derived and the solving method is introduced briefly. Secondly, The seismic responses of continuous rigid-frame bridge in water with 168 meter depth are analyzed, and the displacement and internal force of pier subjected to longitudinal or transverse seismic excitation are studied. The effect of exterior water and interior water on pier seismic response is investigated The results show that the displacement and the internal force of pier is increased duo to water-pier interaction. The influence of interior water and exterior water on pier should be taken into account simultaneously.

关 键 词：深水桥梁 动水压力 墩-水耦联振动 地震响应 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]