斜拉桥施工阶段风险识别及易损性评估  

Risk and Vulnerability Assessment of Cable-stayed Bridge in Construction Stage

作　　者：周江[1] 朱华军 杜胜兵[3] 周敉[3] 

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075 [2]湖北省宜昌至巴东高速公路建设指挥部,湖北兴山443700 [3]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

出　　处：《筑路机械与施工机械化》2013年第9期79-82,共4页Road Machinery & Construction Mechanization

基　　金：中国博士后科学基金项目(2012M511959);湖北省交通厅交通科技项目(2011-700-2.18)

摘　　要：从结构易损性原理出发,结合空间有限元计算,对某斜拉桥最大悬臂阶段在不同风压作用下的内力及应力分布进行分析,并引入损伤系数这一参数来确定全桥结构中的易损单元。分析结果表明:该预应力混凝土斜拉桥在最大悬臂施工阶段的易损结构件为塔梁临时固结处及部分斜拉索。Starting from the principle of vulnerability, combined with finite element calculation, internal force and stress distribution of cable-stayed bridge in largest cantilever stage were analyzed. Damage coefficient was determined to find the vulnerability unit in the bridge. Risk analysis results show that in largest cantilever construction phase of cable-stayed bridge, tower beam＇s temporary rigid fixity area and specific cable are prone to vulnerability.

关 键 词：斜拉桥 风险评估 损伤系数 易损单元 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]