Damage Detection for Shear Frame Structure Based on the Constrained Least Square Method
Luo Jun 1，Liu Gang 1,2，Huang Zong-ming 1,2
1. College of Civil Engineering, Chongqing University, Chongqing 400045, China;
2 .The Key Laboratory of New Technology for Construction of Cities in Mountain Area of the Ministry of Education, Chongqing University, Chongqing 400045, China
Abstract：In view of the existing damage detection method in identifying the damage location and degree of the insufficiency, which based on the modal driven, this article proposed a new damage detection approach that allows for the damage localization and quantitative identification in a shear frame structure. Based on the structural dynamic characteristic equation, the damage coefficient equation of shear structure was deduced, and then the relationship between the damage coefficient and the structural modal parameters before and after damage was established. Based on the damage coefficient equation and constraint linear least square method, this article proposed a new damage identification index for shear frame structure, which allows for the damage localization and quantitative identification in a shear frame structure using a small modal parameters. Finally a simulated model and a lab-scale frame structure were conducted to verify the validity of the algorithm.
罗钧1，刘纲1,2，黄宗明1,2. 基于约束最小二乘法的剪切型框架结构损伤识别新方法[J]. 振动与冲击, 2016, 35(20): 119-124.
Luo Jun 1，Liu Gang 1,2，Huang Zong-ming 1,2. Damage Detection for Shear Frame Structure Based on the Constrained Least Square Method. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(20): 119-124.
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