大跨V形刚构桥标高控制动态可靠性及灵敏度研究  

Research on Dynamic Reliability and Reliability Sensitivity of Elevation Control for Long Span V-shaped Rigid Frame Bridge

作　　者：孙传智[1] 李爱群[1] 缪长青 乔燕[2] 黎少华[1] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [2]宿迁学院建筑工程系,江苏宿迁223800

出　　处：《应用基础与工程科学学报》2012年第5期886-894,共9页Journal of Basic Science and Engineering

基　　金：国家"863计划"项目(2006AA04Z416);国家自然科学基金重点项目(50538020);国家杰出青年基金项目(50725828);国家自然科学基金项目(51078080);江苏省高校自然科学研究项目(10KJB58005)

摘　　要：提出基于响应面法进行大跨V形刚构桥标高控制动态可靠性及灵敏度分析的方法,该方法包括试验设计、有限元分析、响应面函数拟合、标高控制动态可靠性评估和灵敏度分析.以镇大公路运河大桥为例,在考虑有关参数变异的情况下,对施工过程中的标高控制动态可靠性及可靠性灵敏度进行评估,定量分析了各结构参数对标高控制动态可靠性的影响.研究结果表明:大跨混凝土V形刚构桥施工监控过程中随着悬臂长度的增加,标高控制动态可靠性和可靠性敏感性绝对值变化较大,应根据动态可靠性分析结果确定施工过程中的挠度变化允许最大误差.The method of evaluating the dynamic reliability and reliability sensitivity of large-span V-shaped rigid frame bridge was put forward based on the response surface during construction monitoring. The process of method included experimental design, finite element analysis, fitting the response surface function, evaluating the dynamic reliability and analyzing reliability sensitivity. Taking practical engineering for example, the dynamic reliability and reliability sensitivity during construction process were evaluated, and the dynamic reliability sensitivities of structural parameters affecting elevation control were analyzed quantitatively. The results showed that the dynamic reliability and the absolute value of reliability sensitivity varied greatly with the increase of cantilever length during construction for long span V-shaped concrete rigid-frame bridge, and the allowable construction error should be determined according to dynamic reliability data.

关 键 词：大跨V形刚构桥 响应面法 标高控制 动态可靠性 灵敏度分析 

分 类 号：U448.23+2[建筑科学—桥梁与隧道工程]