某公铁两用桥公路引桥的工作状态评定研究  

Research on Evaluation of the Working State of a Highway Approach Bridge of a Highway-railway Bridge

作　　者：刘华 王京杭 张剑[2] 陈欣 孙洪滨[4] 汪锋[4] LIU Hua;WANG Jinghang;ZHANG Jian;CHEN Xin;SUN Hongbin;WANG Feng(China Railway Major Bridge(Nanjing)Bridge and Tunnel Inspect and Retrofit Co.,Ltd.,Nanjing 210031,China;Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Jiangsu Highway Engineering Maintenance Technology Co.,Ltd.,Nanjing 211100,China;Jiangsu Yangtze River Bridge Co.,Ltd.,Nanjing 214521,China)

机构地区：[1]中铁大桥(南京)桥隧诊治有限公司,江苏南京210031 [2]南京航空航天大学,江苏南京210016 [3]江苏高速公路工程养护技术有限公司,江苏南京211100 [4]江苏扬子大桥股份有限公司,江苏南京214521

出　　处：《新技术新工艺》2020年第5期74-77,共4页New Technology & New Process

基　　金：中央高校基本科研业务费专项资金资助项目(NS2020009);国家科技部国家重点研发计划资助项目(2017YFC0806007-1);中国铁路总公司重大课题(2017G006-A);中国电力建设股份有限公司科技项目(KJ-2019-032)。

摘　　要：桥梁静载试验是通过测量桥梁结构在静力荷载作用下各控制截面的应力及结构变形,从而确定桥梁实际工作状态与设计期望值是否相符,它是检验桥梁性能及工作状态最直接、最有效的办法。对某公铁两用桥公路引桥的跨中截面正弯矩对称加载,分析了跨中截面测点的变形、静力荷载试验结构检验系数和相对残余变形。通过荷载试验分析可知,拱肋拱顶截面测点的变形随着荷载的增加基本成比例变化,布置测点实测变形值基本都小于相应的理论计算值,表明该测试截面在静载试验荷载作用下基本处于弹性工作阶段。The static load test of bridge was determining whether the actual working state of bridge was consistent with the design expectation by measuring the stress and structural deformation of each control section of bridge structure under static load.It was the most direct and effective way to test the performance and working state of bridge.Based on the symmetrical loading of the positive moment of the midspan section of a highway approach bridge of a highway-railway bridge,the deformation of the measuring point of the midspan section,the structural test coefficient of the static load test and the relative residual deformation were analyzed.Through the load test analysis,it can be seen that the deformation of the measuring points of the arch rib crown section changed in proportion with the increasing of the load,and the measured deformation values of the arranged measuring points were basically smaller than the corresponding theoretical calculation values,which indicated that the testing section was basically in the elastic working stage under the static load test load.

关 键 词：公铁两用桥 公路引桥 静载试验 工作状态 残余变形 应力 

分 类 号：U441[建筑科学—桥梁与隧道工程]