基于有限元计算的连续刚构桥地震响应分析  

Analysis of Seismic Response of Continuous Rigid Frame Bridge Based on Finite Element Method

作　　者：李胜[1] 周建春[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《特种结构》2014年第5期85-89,共5页Special Structures

摘　　要：文章以某连续刚构桥为工程背景,运用了大型专业有限元结构分析软件分析了不等高墩大跨连续刚构桥地震响应。对比考虑桩土效应、不考虑桩土效应以及在考虑桩土效应的基础上引入隔震摩擦摆支座的3种不同边界条件的自振频率,结果表明考虑桩土效应和加入隔震支座可以减小结构的自振频率。分别采用反应谱分析法和线性时程分析法对连续刚构桥在地震作用下各控制截面的位移和内力进行比较分析,得出结构在地震作用下的一般性规律。同时将时程分析结果与相应的反应谱分析结果比较,验证了选取地震波是否满足规范要求。Based on a continuous rigid frame bridge as an engineering background, this paper analyzed the earthquake response of the long-span continuous rigid frame bridge with piers of different height by using the large-scale FEM software. Through comparing the natural frequency of vibration based on the three kinds of different boundary conditions： considering the couple interaction between the pile and soil not considering couple interaction between the pile and soil, and adding the friction pendulum bearing on the basis of considering couple interaction between the pile, the results showed that considering the couple interaction between the pile and soil and adding isolation bearing can reduce the natural frequency of vibration. Respectively using response spectrum analysis and linear time history analysis to analyze the displacement and internal force of each control section of the continuous rigid frame bridge under action of earthquake comparatively, a general rule of the structure under the seismic action was got. At the same time, the time history analyxix results with the corresponding response spectrum analysis results was compared in this article, with the purpose of verifying whether the selection of seismic waves met the specification requirements.

关 键 词：连续刚构桥 反应谱分析法 时程分析 地震响应 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U448.23[交通运输工程—道路与铁道工程]