基于静动载测试技术的连续多室箱梁力学性能研究  

Research on Mechanical Properties of Continuous Multi Cell Box Girder based on Technology of Static and Dynamic Load Testing

作　　者：夏晓亮 张剑[2] 王京杭 刘华 汪锋[4] XIA Xiaoliang;ZHANG Jian;WANG Jinghang;LIU Hua;WANG Feng(Ningbo Hangzhou Bay Bridge Development Co.,Ltd.,Ningbo 315327,China;Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;China Railway Bridge and Tunnel Technologies Co.,Ltd.,Nanjing 210031,China;Jiangsu Yangtze River Bridge Co.,Ltd.,Nanjing 214521,China)

机构地区：[1]宁波市杭州湾大桥发展有限公司,浙江宁波315327 [2]南京航空航天大学,江苏南京210016 [3]中铁桥隧技术有限公司,江苏南京210031 [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》2023年第4期67-73,共7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(NS2022004);国家科技部国家重点研发计划项目(2017YFC0806007-1);中国铁路总公司重大课题(2017G006-A)。

摘　　要：在静动载测试技术的试验荷载作用下,检验桥梁结构的承载能力是否能满足设计标准,评价桥梁结构的力学特性和工作性能等均至关重要。为获得某预应力混凝土连续多室箱梁桥的静动力性能,开展了某预应力混凝土连续多室箱梁桥的静动载测试技术试验研究。测试结果表明,主要测点实测应变值和挠度值均小于理论计算值,且卸载后预应力混凝土连续多室箱梁桥主要测点相对残余应变率和变形率均小于20%,表明结构处于弹性工作状态;通过动载试验可知预应力混凝土连续多室箱梁桥实测各阶频率均大于相应理论计算频率值,表明预应力混凝土连续多室箱梁桥实际整体刚度良好。静动载测试技术可为同类结构测试提供可靠测试技术方法,将会产生良好的经济效益与社会效益。Under the test load of static and dynamic load testing technology,it was very important to check whether the bearing capacity of the bridge structure could meet the design standards,and to evaluate the mechanical properties and working performance of the bridge structure.In order to obtain the static and dynamic performance of a prestressed concrete continuous multi cell box girder bridge,it was carried out that a test study on the static and dynamic load test technology of a prestressed concrete continuous multi cell box girder bridge.The test results showed that the measured strain and deflection values of the main test points were less than the theoretical calculated values,and the relative residual strain rate and deformation rate of the main test points of the prestressed concrete continuous multi cell box girder bridge after unloading were less than 20%,which indicated that the structure was in elastic working state.Through the dynamic load test,it was known that the measured frequencies of each order of the prestressed concrete continuous multi cell box girder bridge were greater than the corresponding theoretical calculated frequencies,which indicated that the actual overall stiffness of the prestressed concrete continuous multi cell box girder bridge was good.Static and dynamic load testing technology could provide reliable testing methods for similar structures,which would produce good economic and social benefits.

关 键 词：静动载测试技术 连续多室箱梁 预应力混凝土 力学性能 

分 类 号：U441[建筑科学—桥梁与隧道工程]