基于横向分布的简支梁桥结构体系可靠度应用研究  

Research on Application of System Reliability of Simple Supported Beam Bridge Based on Transverse Load Distribution

作　　者：徐岳[1] 来猛刚[2] 姚晓飞[1] 张东东[3] 

机构地区：[1]长安大学旧桥检测与加固技术交通行业重点实验室,陕西西安710064 [2]中交第一公路勘察设计研究院有限公司,陕西西安710075 [3]中交第二公路工程局有限公司,陕西西安710065

出　　处：《公路交通科技》2009年第8期84-88,共5页Journal of Highway and Transportation Research and Development

基　　金：交通部西部交通建设科技资助项目(200531822316)

摘　　要：为了能在构件可靠度(失效概率)基础上求出体系的可靠度,寻找构件与系统可靠度之间的关系,提出了一种新的计算分析方法。在已有失效模式的基础上,将体系可靠度的计算分为2个模块,即在最大横向分布影响线基础上对失效系数的计算和在构件可靠度基础上对单梁失效概率的计算。以试验模型为原型,针对梁式桥结构的主要失效模式——主梁的失效,对铰接状况的结构体系失效系数进行了系统的计算,并和常用方法的计算进行了对比。分析表明,本文所提出的通过失效系数来计算主梁结构体系可靠度的方法是可行的,并且通过横向分布影响线计算失效系数,考虑了梁位置的影响,有效的解决横向联系损伤时的体系可靠性。In order to get the failure probability based system reliability and seek the relation between the component reliability and system reliability, a new calculation and analytical method was put forward. Calculation of system reliability was divided into two paris on the basis of existing failure mode, i.e., to calculate invalidation coefficient based on transverse load-distributing influence lines and failure probability of single beam based on component reliability. To the main failure mode of beam bridge structure, which is the most important failure mode of beam bridge, invalidation coefficient of system from articulated state was calculated systematically based on experimental model. Compared with the commonly used methods, the analysis shows that the new method is feasible. System reliability of transverse connection with damage can be effective resolved, because the method which calculating invalidation coefficient using transverse load-distributing influence lines considers the effect of beam position.

关 键 词：桥梁工程 简支梁桥 体系可靠度 失效系数 横向分布影响线 铰接 

分 类 号：U448.217[建筑科学—桥梁与隧道工程]