Damage detection method for shear buildings using the changes in the first mode shape slopes

Authors:
Hongping Zhu;Lin Li;Xiao-Qiao He
Affiliations:
School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, PR China and Hubei Key Laboratory of Control Structure, Huazhong University of Science and T ...;School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, PR China and Hubei Key Laboratory of Control Structure, Huazhong University of Science and T ...;Department of Building and Construction, City University of Hong Kong, Hong Kong, PR China
Venue:
Computers and Structures
Year:
2011

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Abstract

In this paper, an effective damage detection method for shear buildings is developed using the change(s) in the first mode shape slopes (CFMSS). First, sensitivity analysis of modal parameters and their derivatives is carried out. Next, the hypothesis that the CFMSS value of the damaged storey of a shear building is greater than zero in single damage situations is proved. Then, an iterative algorithm for damage localization is developed. Finally, the magnitudes of damages are quantified using the modified CFMSS values. The validity of the method is demonstrated using an eight-storey numerical example and a three-storey experimental model.