正常交通状态下基于移动TMD响应的桥梁快速损伤识别方法  

Feasibility Study of Mobile TMD for Fast Damage Detection of Bridge Under Actual Traffic Flow

作　　者：武隽[1] 赵敏[1] 文锋[2] 戴杰[1] 

机构地区：[1]长安大学公路学院,西安710064 [2]中交公路规划设计院有限公司,北京100088

出　　处：《武汉理工大学学报（交通科学与工程版）》2014年第3期525-528,533,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金青年科学基金项目资助(批准号:51308055)

摘　　要：将调质阻尼器(TMD)安装在可移动装置上,利用无线感应器记录TMD通过桥梁的加速度时程,通过分析TMD加速度响应对正常交通状态下桥梁的损伤识别进行可行性研究.以一个30m跨径的简支梁桥为例,对桥梁和移动TMD的动力耦合系统建立模型.验证该方法在无车辆干扰情况下进行桥梁损伤识别的可行性,分析在有其他过桥车辆干扰下的损伤识别能力,结果与预期目标吻合.本方法对桥梁在不干扰正常交通状态下利用移动TMD进行快速损伤检测提供了理论依据.This study aims at conducting the feasibility study on fast damage detection of bridges through using mobile TMD under actual traffic flow.The main idea of the damage detection method is to inspect the acceleration of TMD installed on TMD when passing the monitoring bridge through wireless sensors.The damage location and damage level of the bridge can be identified through analyzing the recorded acceleration of TMD.The finite element model of a simple-supported bridge with span of 30 mis established to be taken as the prototype bridge.Through the calculation of the system composed of the bridge and mobile TMD,it is found that the damage recognition can be achieved by the proposed approach.In addition,the damage recognition can also be achieved when other vehicle is also moving on the bridge.The theoretical results showed satisfied results of the proposed approach and laid the foundation for application of this approach on fast damage detection of the bridge.

关 键 词：桥梁工程 TMD 动力耦合计算 损伤识别 

分 类 号：U446.3[建筑科学—桥梁与隧道工程]