大型渡槽的竖向地震效应分析  

Analysis of vertical seismic effects for large-scale aqueduct bridges

作　　者：李遇春[1] 楼梦麟[1] 周成[1] 

机构地区：[1]同济大学结构工程与防灾研究所土木工程防灾国家重点实验室,上海200092

出　　处：《地震工程与工程振动》2008年第2期102-107,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50279031)

摘　　要：基于流体的位移有限元模式,借助于Ansys程序,考虑流体与结构之间的相互作用(作滑动边界处理),对3种型式的渡槽结构竖向地震效应进行了时程与反应谱分析。计算结果具有较好的精度,满足工程要求。本文的方法也可直接用于大型渡槽的水平地震效应分析。对于不同结构型式的渡槽,在七度抗震设防时,建议适当考虑竖向地震效应。With the aid of the Ansys code, the vertical seismic effects of three kinds of aqueduct bridges were analyzed with time-history and response-spectrum methods. The displacement-based finite element of fluid is applied to the analysis, and the fluid-structure interaction on interface is considered. The computational result has a good precision that satisfies the need of practical engineering. The method of this paper can also be directly used in the analysis of horizontal seismic effects. For the grade 7 of earthquake intensity, the vertical seismic effects are suggested to be considered in the structural designs.

关 键 词：大型渡槽 竖向地震效应 时程分析 反应谱 ANSYS程序 

分 类 号：P315.957[天文地球—地震学]