高架桥横向地震反应参数分析  

Parameter analysis of trestle bridge under lateral forces

作　　者：张海[1] 蔡永盛 阎石[1] 郑伟[1] 

机构地区：[1]沈阳建筑工程学院土木工程学院,辽宁沈阳110168 [2]大连筑成建设有限公司,辽宁大连116012

出　　处：《沈阳建筑工程学院学报（自然科学版）》2004年第2期87-89,共3页Journal of Shenyang Architectural and Civil Engineering University(Nature Science)

基　　金：建设部科技攻关项目

摘　　要：建立了高架桥双自由度体系横向地震反应的计算模型以及运动方程,利用解析方法及数值分析方法对城市高架桥结构横向地震反应参数进行了比较分析.阐述了阻尼比、质量比、刚度比以及扰动频率等参数对桥墩振动反应的影响规律.结果表明:主梁与桥墩的质量比对桥墩振动的影响较小,适当增加阻尼比及支座的刚度可以减小桥墩的振动反应.The calculating model and motion equation of the elevated highway bridge under the lateral forces are set up.The comparative analysis of parameters of the structure under the lateral forces is carried out by the analytical numerical methods.The influencing laws of the vibration of the piers by damping ratio,mass ratio,stiffness ratio and frequency ratio are studied.The results reveal that the mass ratio of beams and piers has little influence on vibration of the piers,and appropriate increasing damping ratio and stiffness of the braces could reduce vibration response of the piers.This is helpful for the future design of elevated highway bridges.

关 键 词：高架桥 计算模型 参数分析 地震反应 

分 类 号：TU311.3[建筑科学—结构工程]