桥梁动静载试验中支座变形监测分析  

Monitoring and Analysis of Bearings Deformation in Dynamic and Static Load Test of Bridge

作　　者：汪洪[1,2] Wang Hong(Anhui Construction Engineering Quality Supervision and Testing Station Co.,Ltd.,Hefei,China;Anhui&Huaihe River Institute of Hydraulic Research,Hefei,China)

机构地区：[1]安徽省建筑工程质量监督检测站有限公司,安徽合肥 [2]安徽省水利部淮委水利科学研究院,安徽合肥

出　　处：《科学技术创新》2025年第12期141-144,共4页Scientific and Technological Innovation

摘　　要：通过对某大跨度钢箱梁桥进行动静载试验,系统研究了其支座在不同工况下的变形特性。采用高精度位移传感器和激光测距仪对支座竖向位移、水平位移进行实时监测,获取了支座变形的时程曲线和空间分布规律。试验结果表明:静载作用下支座竖向压缩变形随荷载增加呈现非线性特征,最大压缩量为4.8 mm;动载作用下支座水平位移主要受车辆制动力影响,80 km/h制动工况下最大位移达5.5 mm,多车编队制动产生6.9 mm位移。The deformation characteristics of a bearings oflong-span steel box girder bridge under different working conditions were systematically studied through dynamic and static load tests.High precision displacement sensor and laser distance meter are used to monitor the vertical displacement and horizontal displacement of the bearings in real time,and the time history curve and spatial distribution of the deformation of the bearings are obtained.The experimental results show that the vertical compression deformation of the bearings under static load presents nonlinear characteristics with the increase of load,and the maximum compression is 4.8 mm.Under dynamic load,the horizontal displacement of the bearingsis mainly affected by the braking force of the vehicle.The maximum displacement reaches 5.5 mm under 80 km/h braking condition,and the displacement generated by multi-vehicle formation braking is 6.9 mm.

关 键 词：桥梁支座 变形监测 动载试验 静载试验 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]