Structural damage and force identification under moving load

Hongping Zhu, Ling Mao, Shun Weng, Yong Xia

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)261-276
Number of pages16
JournalStructural Engineering and Mechanics
Volume53
Issue number2
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Moving load
  • Response sensitivity
  • Structural damage identification
  • System Markov parameters

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering
  • Mechanics of Materials

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