大跨度单索面斜拉桥静荷载试验研究  

Static Load Test Analysis of Cable-stayed Bridge with Single Cable Plane and Large Span

作　　者：李果 高文军[2] LI Guo;GAO Wenjun(Chongqing Road&Bridge Co.,Ltd.,Chongqing 400060;China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067)

机构地区：[1]重庆路桥股份有限公司,重庆400060 [2]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2023年第1期69-74,共6页Technology of Highway and Transport

基　　金：国家重点研发计划项目(2020YFF0217801);重庆市技术创新与应用发展专项重点项目(cstc2019jscx-fxydX0038)。

摘　　要：重庆石门嘉陵江大桥为大跨度单索面斜拉桥,至今已服役30年,为了解大桥当前结构状态和受力性能,对大桥关键受力构件进行静荷载试验,主要内容包括主梁最大正、负弯矩,塔身最大弯矩,斜拉索索力,主梁挠度和塔顶偏位,旨在根据现场试验结果与荷载试验评定方法,评估桥梁的结构状态。结果表明,石门大桥各试验截面平均应变、挠度、塔顶偏位和索力校验系数均在合理范围内,相对残余应变均小于20%;大桥整体处于弹性工作状态,受力状态良好,满足设计荷载的正常使用要求。Chongqing Jialingjiang River Shimen Bridge is a cable-stayed bridge with single cable and large span,has been in service for 30 years.In order to evaluate the current structural condition and mechanical performance of the bridge,the static load test method is adopted to evaluate the structural condition of the bridge according to the on-site test results and loading test evaluation method.The main contents of the test include the maximum positive and negative bending moments of the beam,the maximum bending moment of the tower,the cable force,the deflection of the beam and the deflection of the tower top.The testing coefficient of strain,deflection,tower deflection and cable force are within a reasonable range,and the relative residual strain is less than 20%.The test results show that the bridge is in elastic operation condition.It meets the normal use requirements of the design load.

关 键 词：斜拉桥 静载试验 校验系数 承载能力评定 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]