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Title: Structural damage and force identification under moving load
Authors: Zhu, H
Mao, L
Weng, S
Xia, Y 
Keywords: Moving load
Response sensitivity
Structural damage identification
System Markov parameters
Issue Date: 2015
Publisher: Techno Press
Source: Structural engineering and mechanics, 2015, v. 53, no. 2, p. 261-276 How to cite?
Journal: Structural engineering and mechanics 
Abstract: Structural damage and moving load identification are the two aspects of structural system identification. However, they universally coexist in the damaged structures subject to unknown moving load. This paper proposed a dynamic response sensitivity-based model updating method to simultaneously identify the structural damage and moving force. The moving force which is equivalent as the nodal force of the structure can be expressed as a series of orthogonal polynomial. Based on the system Markov parameters by the state space method, the dynamic response and the dynamic response derivatives with respect to the force parameters and elemental variations are analytically derived. Afterwards, the damage and force parameters are obtained by minimizing the difference between measured and analytical response in the sensitivity-based updating procedure. A numerical example for a simply supported beam under the moving load is employed to verify the accuracy of the proposed method.
ISSN: 1225-4568
EISSN: 1598-6217
DOI: 10.12989/sem.2015.53.2.261
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