钢框架模型结构的损伤诊断  

Damage Diagnosis on a Steel Frame Model Structure

作　　者：徐龙河[1] 刘向真 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]潍坊市鲁成招标有限公司,潍坊261061

出　　处：《天津大学学报》2008年第2期221-225,共5页Journal of Tianjin University(Science and Technology)

基　　金：北京交通大学人才基金资助项目(2007RC034)

摘　　要：提出了一种基于结构振动特性的两阶段损伤诊断方法,先由基于柔度矩阵的损伤定位技术确定可能损伤的单元位置,然后采用二阶特征灵敏度分析法对其损伤程度进行估计.对一两层空间钢框架模型结构进行了模拟损伤试验研究,采用环境与力锤脉冲两种激励方式,考虑了4种损伤模式.损伤诊断的结果表明,该方法能够有效地识别出结构损伤单元的位置与严重程度.A vibration-based two-stage damage diagnosis method was proposed. A flexibility matrix-based damage locating technique was used to find the most possible damaged elements of the structure, and then the damage severity was estimated using the second order eigen-sensitivity analysis method. Damage identification tests on a two-story spatial steel frame model structure were carried out, and two excitation patterns, ambient excitation and the hammer impacts excitation, were adopted. The 4 known damaged cases were considered. The results indicate that the proposed method can effectively detect the damage locations and assess the severity.

关 键 词：结构试验 损伤诊断 特征灵敏度分析 柔度矩阵 

分 类 号：TU317.1[建筑科学—结构工程] O327[理学—一般力学与力学基础]