应变模态在桁架结构损伤识别中的研究  

The Study of Strain Modal in the Application of Truss Structural Damage Identification

作　　者：韦健 徐典[2] 万雨田 张威[4] 

机构地区：[1]洛阳市规划建筑设计研究院有限公司西南分公司,重庆400030 [2]重庆科技学院建筑工程学院,重庆401331 [3]苏州立诚建筑设计院有限公司,江苏昆山215300 [4]天津市地质工程勘察院,天津300191

出　　处：《工程建设与设计》2015年第3期46-48,共3页Construction & Design for Engineering

摘　　要：对平面桁架结构的损伤识别进行了研究。首先从桁架节点位移推导了应变模态的计算公式,然后通过有限元软件建立桁架结构数值模型,采用一阶应变差识别指标对桁架发生单处和多处构件损伤进行损伤定位。结果表明了一阶应变差识别指标在平面桁架结构中损伤定位的可行和有效。In this paper,the plane truss structural damage identification is studied.First,the calculation formula of strain modal is deduced from truss node displacement.Then through the finite element software truss structure numerical model is built up.The first-order differential strain identification index is used to Damage location for only and several component damage of truss.The results show that first-order differential strain identification index in the plane truss structure damage location is feasible and effective.

关 键 词：结构损伤 识别指标 桁架结构 一阶应变差 

分 类 号：TU375.5[建筑科学—结构工程]