大跨预制T梁裸梁静载试验研究  

Research on static load test of large span precast T-shaped girders

作　　者：曾勇[1,2] 杨长春 吴秀平 ZENG Yong;YANG Chang-chun;WU Xiu-ping(State Key Laboratory of Mountain Bridge and Tunnel Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Research Center for Mountain Bridge Structures and Materials,Ministry of Education of Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学山区桥梁及隧道工程国家重点实验室,重庆400074 [2]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：《河南城建学院学报》2020年第6期1-7,共7页Journal of Henan University of Urban Construction

基　　金：国家自然科学基金资助项目(51478071);重庆市留学人员回国创业创新支持基金项目(cx2018113);山区桥梁与隧道工程国家重点实验室培育基地开放基金项目(CQSLBF-Y14-3,CQSLBF-Y16-10)。

摘　　要：以实际工程项目为依托,采用基于应力增量确定控制加载量的静载试验方法来评估裸梁的实际“质量”。理论与实际结合分析得到:各测点实测值随加载等级的提高而近似呈线性增加趋势,且大部分结构对称的测点其实测值也呈现出良好的对称性;测点实测值均小于理论值,无明显可见裂缝,且校验系数、相对残余应变均满足规范规定;表明结构的强度和刚度能满足桥梁在正常使用状态下的需求。Based on the actual engineering project,this paper uses the static load test method to determine the control load based on the stress increment to evaluate the actual"quality"of the bare beam.The combination of theory and practice analysis shows that the measured value of each measuring point increases approximately linearly with the increase of the loading level,and the measured value of the most structurally symmetric measuring points actually exhibits good symmetry;the measured values of the measuring points are less than the theory value,no obvious visible cracks,and the calibration coefficient and relative residue meet the specifications,indicating that the strength and stiffness of the structure can meet the needs of the bridge under normal use.

关 键 词：桥梁工程 静载试验 预制T梁 装配式 应力增量 

分 类 号：U446[建筑科学—桥梁与隧道工程]