根据荷载响应效应诊断桥梁健康状况的研究与实践  

Research and Practice to Diagnose State of Health of Bridges Based on Its Effect of Responded to Load Applied

作　　者：姜晨光[1] 贺勇[2] 李少红[2] 刘文娟[2] 彭建国[3] 张清峰[1] 

机构地区：[1]江南大学土木工程学院,无锡214122 [2]青岛农业大学建筑学院,青岛266109 [3]湖南省交通规划勘察设计院,长沙410011

出　　处：《武汉理工大学学报（交通科学与工程版）》2010年第1期184-186,194,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目(批准号:79160173);江南大学211建设重点项目基金项目(批准号:2004012);无锡市建设科研基金项目(批准号:2006-10)资助

摘　　要：桥梁的损伤机理属于典型的非线性问题.频率是桥梁在线监测中最易获得的模态参数且精度很高,因此通过桥梁响应频率的变化来识别结构破损是否发生是最为简洁而有效的方法.桥梁的健康状况与桥梁的结构形式、采用的材料、设计的合理性、施工的质量、荷载的作用等因素有关,对于一个在役桥梁,其健康状况主要决定于各种荷载的作用程度与作用过程,不同的桥梁对荷载的作用具有不同的响应特征,因此,根据桥梁对荷载作用的响应特征可以对桥梁的健康状况进行初步的诊断.根据大量的桥梁原位监测数据,提出了基于荷载响应效应的桥梁健康状况诊断方法,给出了初步的诊断原理和实例.The bridge＇s damage mechanism belongs to typical non-linearity issue. Frequency is the mode parameter with higher precision which is most easily obtained during the bridge＇s on-line monitoring, so it is a kind of simple and effective method to identify whether the structure is damaged or not through diversification of the bridge responding frequency. State of health of bridges relates to structural shape, building material, reasonable of design, quality of construction, and effect of load applied. State of health of a bridge in working is primary decided by the level and course of load applied. Distinct bridge has different effect features in load applied. Therefore, we can preliminary diagnosed the health of a bridge based on its effect features of responded to load applied. Based on a large field monitoring data of many bridges, a diagnosis way of health of bridges based on its effect of responded to load applied has been put forward. It gives the preliminary diagnosed principle of this way and an example.

关 键 词：桥梁工程 在役结构 健康检测 诊断方法 荷载响应效应 原位监测 

分 类 号：U446[建筑科学—桥梁与隧道工程] TU317[交通运输工程—道路与铁道工程]