地震作用下大跨度斜拉桥场地效应分析  

Site Effect Analysis of Long-span Cable-stayed Bridge under Seismic Action

作　　者：吴俊华 梅涛 Wu Junhua;Mei Tao(College of Science and Technology of China Three Gorges University,Yichang,Hubei 443000;Henan Haojin Construction Engineering Co.,Ltd.,Linzhou,Henan 456550)

机构地区：[1]三峡大学科技学院,湖北宜昌443000 [2]河南昊锦建设集团有限公司,河南林州456550

出　　处：《工程技术研究》2022年第20期11-13,共3页Engineering and Technological Research

基　　金：2020年度湖北省高校人文社科重点研究基地巴楚艺术发展研究中心开放基金项目(2020KF04)。

摘　　要：文章以某大跨度斜拉桥为研究对象,考虑地震作用,分为三类场地六种工况对桥梁进行地震作用激励,分析场地效应对桥梁地震响应作用的影响。结果表明:软土对桥梁地震响应值大于硬土;场地效应能引起跨中位移和弯矩突变,对剪力有利;对主塔的影响与挂拉索的位置有关。In this paper,a long-span cable-stayed bridge is taken as the research object.Considering the seismic action,the bridge is stimulated by seismic action according to three types of sites and six kinds of working conditions to analyze the influence of site effect on the bridge seismic response.The results show that the seismic response of soft soil to bridge is greater than that of hard soil.Site effect can cause mid-span displacement and bending moment mutation,which is beneficial to shear force.The influence on the main tower is related to the position of the hanging cable.

关 键 词：斜拉桥 功率谱 反应谱 场地效应 多点激励 

分 类 号：U448[建筑科学—桥梁与隧道工程]