大跨度结合梁斜拉桥的参数敏感性分析  

Analysis of Parameter Sensitivity of Long Span Composite Girder Cable-Stayed Bridge

作　　者：赵雷[1] 孙才志[1] 陈文元[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《世界桥梁》2011年第6期38-41,共4页World Bridges

基　　金：国家科技支撑计划项目(2006BAG04B03)

摘　　要：结构参数误差是斜拉桥施工控制过程中误差产生的重要来源。为分析结构各设计参数对桥梁成桥状态影响的敏感性,以江津观音岩长江大桥为背景,采用有限元法计算各设计参数对大跨度结合梁斜拉桥主梁成桥线形和主梁应力的影响。结果显示:主梁重量、拉索制造长度、桥面板重量和温差对该桥主梁成桥线形及主梁应力有显著影响;桥面板弹性模量和主梁弹性模量对成桥状态影响不大。The errors of structural parameters are the important sources causing the errors in the construction control process of cable-stayed bridge.To analyze the sensitivity of influences of various structural design parameters on the completion status of the long span composite girder cable-stayed bridge,the Guanyinyan Changjiang River Bridge in Jiangjin was cited as an example,the finite element method was used to calculate the influence of each parameter on the geometric shape and stress of the main girder of the completion status of the bridge.The results of the calculation reveal that the weight of the main girder,fabricated length of the stay cables,weight of the deck plates and temperature differences have significant influences on the geometric shape and stress,however,the influence of elastic modulus of the deck plates and main girder on the completion status of the bridge is not great.

关 键 词：斜拉桥 结合梁 结构参数 敏感性 分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U441.5[交通运输工程—道路与铁道工程]