一种框架结构损伤诊断两步法  

A TWO-STEP DAMAGE DETECTION APPROACH FOR FRAME STRUCTURE

作　　者：刁延松[1] 李华军[1] 李军[2] 孙绍东[2] 

机构地区：[1]中国海洋大学工程学院,山东青岛266071 [2]青岛理工大学土木工程学院,山东青岛266033

出　　处：《工业建筑》2005年第z1期966-969,共4页Industrial Construction

摘　　要：提出了一种仅用限模态信息的结构损伤诊断两步法。第一步,利用测量自由度正则化损伤指标向量得到损伤构件的大致区域。第二步,在第一步选定的区域内,利用设计灵敏度技术对可能的损伤构件进行定位、定量分析。利用四层平面框架进行了数值模拟,建立四层平面框架的有限元模型,用不同单元弹性模量的降低来模拟各种不同的损伤工况,并对每种损伤工况进行了损伤位置和损伤程度的诊断,数值模拟结果表明,本文所提出的结构损伤诊断的两步法是可行的。This paper described a two-step structural damage detection approach with limited modal information.Firstly,the damaged areas were approximately localized by the damage indicator of the measured degree of freedom.Secondly,the damaged elements were located and quantitatively analyzed by the technique of design sensitivity in the selected areas.The method was simulated with a 4 floor plane frame,the finite element model of the 4 floor plane frame were created,the different damage scenarios were simulated by decreasing the elastic modulus of different elements of the frame,every damage scenarios were detected.According to the simulation results,the two-step damage detection approach was effective.

关 键 词：损伤诊断 有限元 设计灵敏度 两步法 

分 类 号：TU317[建筑科学—结构工程]