考虑桩土效应的大跨径斜拉桥结构动力特性分析  

Dynamic analysis of long-span cable-stayed bridge considering pile-soil effect

作　　者：蒋皓 Jiang Hao(Jiangsu Zhongshe Group Co.,Ltd.,Wuxi 214072,China)

机构地区：[1]江苏中设集团股份有限公司,江苏无锡214072

出　　处：《山西建筑》2020年第10期150-152,共3页Shanxi Architecture

摘　　要：以福银高速九江长江公路大桥为工程背景,通过有限元计算软件Midas Civil对该桥进行考虑桩土效应的模拟计算,采用子空间迭代法分析该桥的动力特性,得到该桥的前20阶振动频率和前10阶振型图。结合混合梁斜拉桥的结构特点,从计算结果可以看出,该桥的动力特性较好,可为后期运营监测及抗震、抗风性能研究提供基础性数据,也可对同类桥型的抗震、抗风设计及车—桥耦合作用研究起到借鉴作用。Taking the Jiujiang Yangtze River Highway Bridge of Fuzhou Yinchuan expressway as the engineering background,the finite element calculation software Midas Civil is used to simulate the bridge considering the pile-soil effect.The subspace iteration method is used to analyze the dynamic characteristics of the bridge,and the first 20 vibration frequencies and the first 10 vibration patterns of the bridge are obtained.Combined with the structural characteristics of the hybrid beam cable-stayed bridge,it can be seen from the calculation results that the dynamic characteristics of the bridge are good,which can provide basic data for the later operation monitoring,seismic and wind resistance performance research,and can also play a reference role in the seismic,wind resistance design and vehicle bridge coupling research of the same type of bridge.

关 键 词：桩土效应 大跨径 斜拉桥 动力特性 自振频率 

分 类 号：U441[建筑科学—桥梁与隧道工程]