震后桥梁挠度测量方法的设计与实现  

Design and Implementation of a Method for Measuring Deflection of Post-earthquake Bridges

作　　者：林元茂[1] 李建[1] 韩立 LIN Yuanmao;LI Jian;HAN Li(Chongqing Vocational Institute of Engineering,Chongqing 402260,China;Ecological Resources and Landscape Research Institute,Chengdu University of Technology,Chengdu 610059,Sichuan,China;State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation of Soil and Water Pollution,Chengdu University of Technology,Chengdu 610059,Sichuan,China)

机构地区：[1]重庆工程职业技术学院,重庆江津402260 [2]成都理工大学生态资源与景观研究所,四川成都610059 [3]成都理工大学国家环境保护水土污染协同控制与联合修复重点实验室,四川成都610059

出　　处：《地震工程学报》2019年第3期807-812,共6页China Earthquake Engineering Journal

基　　金：国家自然科学基金项目(41501060)

摘　　要：对震后桥梁稳定性与安全性检测过程中,挠度是一项重要检测指标,但是测量这一参数较为复杂,干扰较多,结果存在较大问题。设计一种震后桥梁挠度测量方法。根据实际桥梁设置相关参数,采用共轭梁法计算震后桥梁固定点的初始挠度,结合震后桥梁挠度曲线函数,获得欲求解的桥梁截面挠度值;修正桥梁截面挠度值时,将监测点高程差同基准点高程差间的差值问题替代挠度偏差问题,分析倾斜传感器获取维护点倾斜传感器的理论值和基准点倾斜传感器的理论值,确定挠度偏差,修正震后桥梁挠度测量值。通过简支梁与连续梁实验,验证测量震后桥梁挠度时,具有更高测量精度。Deflection is an important index for determining bridge stability and safety after an earthquake, but the measurement of bridge deflection is complex and suffers a lot of interference, so the obtained results are problematic. In this study, we designed a method for measuring bridge deflection after an earthquake. Based on the relevant parameters of an actual bridge, we used the conjugate beam method to calculate the initial deflection of a fixed point on a bridge after earthquake. Combined with the deflection curve function of the post-earthquake bridge, we can determine the deflection of the bridge section. To determine the deflection error of a post-earthquake bridge and correct the measured bridge deflection, we replaced the deflection error problem with the difference between the elevations of the monitored and reference points. Experiments involving simply supported and continuous girders verified the accuracy of the proposed method for measuring the deflection of a bridge post-earthquake.

关 键 词：倾斜传感器 震后 桥梁挠度 测量 共轭梁法 修正 

分 类 号：TU446[建筑科学—岩土工程]