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Structural Monitoring and Maintenance
  Volume 10, Number 1, March 2023 , pages 063-86

Damage detection technique in existing structures using vibration-based model updating
Devesh K. Jaiswal, Goutam Mondal, Suresh R. Dash and Mayank Mishra

    Structural health monitoring and damage detection are essential for assessing, maintaining, and rehabilitating structures. Most of the existing damage detection approaches compare the current state structural response with the undamaged vibrational structural response, which is unsuitable for old and existing structures where undamaged vibrational responses are absent. One of the approaches for existing structures, numerical model updating/inverse modelling, available in the literature, is limited to numerical studies with high-end software. In this study, an attempt is made to study the effectiveness of the model updating technique, simplify modelling complexity, and economize its usability. The optimization-based detection problem is addressed by using programmable open-sourced code, OpenSees and a derivative-free optimization code, NOMAD Modal analysis is used for damage identification of beam-like structures with several damage scenarios. The performance of the proposed methodology is validated both numerically and experimentally. The proposed method performs satisfactorily in identifying both locations and intensity of damage in structures.
Key Words
    damage detection; optimization; model updating; structural health monitoring; vibrational analysis
Devesh K. Jaiswal, Goutam Mondal, Suresh R. Dash and Mayank Mishra: School of Infrastructure, Indian Institute of Technology Bhubaneswar, Bhubaneswar-752050, India

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