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作 者:高岩渊 刘华 汪锋 张剑[4] 王京杭 GAO Yanyuan;LIU Hua;WANG Feng;ZHANG Jian;WANG Jinghang(Jiangsu Yangtze River Expressway Passages Management Co.,Ltd,Jiangyin 214400,China;China Railway Bridge and Tunnel Technologies Co.,Ltd.,Nanjing 210031,China;Jiangsu Ninghu Expressway Stock Co.,Ltd.,Nanjing 210049,China;Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
机构地区:[1]江苏扬子江高速通道管理有限公司,江苏江阴214400 [2]中铁桥隧技术有限公司,江苏南京210031 [3]江苏宁沪高速公路股份有限公司,江苏南京210049 [4]南京航空航天大学,江苏南京210016
出 处:《新技术新工艺》2022年第1期57-61,共5页New Technology & New Process
基 金:国家科技部国家重点研发计划项目(2017YFC0806007-1);南京航空航天大学本科教学建设项目(2021JG0119A);南京航空航天大学航空学院课程思政研究中心课程思政研究课题(HKXYKCSZ-YB-012);中央高校基本科研业务费专项资金资助项目(NS2020009)。
摘 要:以某拱结构为对象,设计了偏心加载的静载试验方案,通过测量拱结构在静载作用下各控制截面的应变及结构变形,从而确定拱结构实际工作状态,其为检验拱结构性能及工作状态最为直接有效的方法。对某拱结构引桥的跨中截面正弯矩偏心加载,分析了偏心加载作用下跨中截面测点的应变及变形、残余应变和残余变形等。通过荷载试验分析可知,拱结构拱顶截面测点的应变和变形随着荷载的增加基本成比例变化,主要测点残余应变和残余变形均较小,相对残余应变率和相对残余变形率基本小于20%,表明拱结构在偏心加载作用下基本处于弹性工作阶段。Took an arch structure as an object,a static load test scheme under eccentric load was designed.By measuring the strain and structural deformation of each control section of the arch structure under static load,the actual working state of the arch structure was determined,which was the most direct and effective method to test the performance and working state of the arch structure.The strain and deformation,residual strain and residual deformation of the measuring points of the mid span section under the eccentric load were analyzed for the mid span section sagging moment eccentric load of an arch structure approach bridge.Through the load test analysis,it could be seen that the strain and deformation of the measuring points of the arch crown section of the arch structure basically changed in proportion with the increase of load.The residual strain and residual deformation of the main measuring points were small,and the relative residual strain rate and relative residual deformation rate were basically less than 20%,which indicated that the arch structure was basically in the elastic working stage under eccentric load.
分 类 号:U441[建筑科学—桥梁与隧道工程]
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