Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2025 , Vol. 59 >Issue 4: 541 - 549

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2023.317

Naval Architeture, Ocean and Civil Engineering

An Improved Generalized Flexibility Sensitivity Method for Structural Damage Detection

  • NIU Zirong ,
  • WU Feng ,
  • HAN Zhaolong ,
  • ZHUO Yang ,
  • CHE Ailan ,
  • ZHU Hongbo
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  • 1. School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Chongqing Research Institute, Shanghai Jiao Tong University, Chongqing 401135, China
    3. Shanghai Third Harbor Engineering Science & Technology Research Institute Co., Ltd., Shanghai 200032, China
    4. School of Operational Support, Rocket Force Engineering University, Xi’an 710025, China

Received date: 2023-07-12

  Revised date: 2023-09-11

  Accepted date: 2023-10-19

  Online published: 2023-11-14

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Abstract

This paper proposes an improved generalized flexibility sensitivity method for structural damage detection. The proposed approach improves the accuracy of the original generalized flexibility sensitivity method by increasing the order of the sensitivity in the damage detection equations. Additionly, restraint conditions are applied to the damage coefficients to ensure that they meet the necessary requirements. Then, the resulting nonlinear damage detection equations are solved using sequential quadratic programming method, whose calculation is simple and efficient. Finally, the proposed approach is validated numerically and experimentally using a truss structure finite element model and a 7-story steel-frame structure experiment, respectively. The results show that the proposed approach provides more accurate damage location and severity detection compared with the original method. Furthermore, it is better suited for cases involving large damage severity.

Key words： structural damage detection; generalized flexibility; modal; sensitivity; optimization

Cite this article

NIU Zirong , WU Feng , HAN Zhaolong , ZHUO Yang , CHE Ailan , ZHU Hongbo . An Improved Generalized Flexibility Sensitivity Method for Structural Damage Detection[J]. Journal of Shanghai Jiaotong University, 2025 , 59(4) : 541 -549 . DOI: 10.16183/j.cnki.jsjtu.2023.317

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