宽幅预应力混凝土T梁桥荷载试验  

Load Test Study of Wide Prestressed Concrete T-beam Bridge

作　　者：何少锋 谭宇杰 曾勇[2,3] HE Shaofeng;TAN Yujie;ZENG Yong(Engineering Design and Research Institute Co.,Ltd.,Chongqing Jiaotong University,Chongqing 400074,China;State Key Laboratory of Mountain Bridge and Tunnel Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Mountain Bridge and Materials Engineering Research Center of Ministry of Education,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学工程设计研究院有限公司,重庆400074 [2]重庆交通大学山区桥梁与隧道工程国家重点实验室,重庆400074 [3]重庆交通大学山区桥梁结构与材料教育部工程研究中心,重庆400074

出　　处：《洛阳理工学院学报（自然科学版）》2023年第1期18-24,共7页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：重庆市留创计划创新类资助入选项目(CX2020117,CX2018113);山区桥梁及隧道工程国家重点实验室开放基金项目(CQSLBF-Y14-3,CQSLBF-Y16-10);山区桥梁结构与材料教育部工程研究中心开放基金项目(QLGCZX-JJ2017-5).

摘　　要：为确保车辆能在桥梁上安全通行,基于荷载试验,把测试截面所得试验数据与计算值进行比较,综合分析挠度、应力及裂缝,验证所测试桥梁结构刚度与强度是否符合标准。以某宽幅预应力混凝土T梁桥的2#引桥桥梁为例,取30 m跨最大正弯矩正载、最大正弯矩上游侧偏载为工况,分别对试验所选截面的应力应变以及位移的实测数据和理论数据的比值以及在测试过程中的异常现象进行研究。该试验桥跨的刚度和强度达标,2#引桥试验桥跨工作性能符合设计荷载标准(公路-Ⅰ级)。In order to ensure the safe passage of the crowd vehicles on the bridge,based on the load test,the test data of the test section is compared with the calculated value,and the deflection,stress and crack are comprehensively analyzed to check whether they meet the standard.Taking the 2#approach bridge of a wide-width prestressed concrete T beam bridge as an example,30m maximum positive moment loading and the upstream side partial load of the maximum positive moment are taken as working conditions.The stress and strain of the selected section in the test,ratio of measured and theoretical data and the abnormal phenomena in the test are studied respectively.The test results show that the rigidity and strength of the test bridge meet the standard,and the working performance of the 2#approach bridge meets the design load standard(Highway-Class I).

关 键 词：桥梁工程 荷载试验 引桥 控制截面 承载能力 

分 类 号：U448.34[建筑科学—桥梁与隧道工程]