某单箱三室连续梁桥静载试验研究  

LOADING TESTS OF A CONTINUOUS BEAM BRIDGE WITH A SINGLE BOX AND THREE COMPARTMENTS FORM

作　　者：曾勇[1] 周建平 孙宗波 樵继川 周昌海 ZENG Yong;ZHOU Jianping;SUN Zongbo;QIAO Jichuan;ZHOU Changhai(State Key Laboratory of Mountain Bridge and Tunnel Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Zhongxian Traffic Operation Monitoring and Emergency Dispatch Center,Chongqing 404100,China;Zhongxian Changda Construction Investment Company,Chongqing 404300,China;Zhongxian Traffic Engineering Quality Safety Center,Chongqing 404100,China)

机构地区：[1]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 [2]忠县交通运行监测与应急调度中心,重庆404100 [3]忠县公路养护中心,重庆404300 [4]忠县交通工程质量安全中心,重庆404300 [5]忠县畅达建设投资有限公司,重庆404300

出　　处：《低温建筑技术》2024年第6期91-94,共4页Low Temperature Architecture Technology

基　　金：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);重庆市留学人员回国创业创新支持基金项目(cx2018113,cx2020117)。

摘　　要：为测试某单箱三室连续梁桥整体受力特点,检验桥跨结构的承载能力、结构变形是否满足在正常使用状态下的设计要求,通过Midas/Civil对该桥进行有限元分析,并进行了静载试验研究,测试在静载试验下,各控制截面的应变状态和整体挠度,试验结果表明,各控制截面应变与挠度值实测结果与理论结果基本一致,且与之对应的校验系数在规定范围内,该桥强度和刚度均满足设计要求,桥跨结构的承载能力、结构变形在正常使用状态下均符合设计要求;在加载试验前后,对测试截面附近进行了裂缝观测,没有发现新增裂缝,试验桥跨结构承载力满足设计荷载标准要求。The paper investigates stress state of a continuous beam bridge with a single box and three compartments form,the load carrying capacity and structural deformation of which are checked to meet design requirements under normal usage.With the finite element analysis by means of Midas/Civil,the strain state and overall deflection of the various control sections under the static load tests are obtained.The results show that the strain and deflection val-ues of each control section were basically consistent with the theoretical results,and the check coefficients corre-sponding to them are within the specified range.The measured strain and deflection values of each control section are basically consistent with the theoretical results,and the corresponding check coefficients are within the specified range.The strength and stiffness of the bridge meets the design requirements,and the load carrying capacity and structural deformation of the bridge span structure meets the design requirements under the normal use condition;before and after the loading test,the crack observation was carried out near the test section,and no new cracks are found,and the test structural capacity of the bridge span meets the design loading with no new cracks,therefore the structural load capacity of the test bridge spans met the design load.

关 键 词：单箱三室 连续梁桥 静载试验 结构承载力 

分 类 号：TU312[建筑科学—结构工程]