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Smart Structures and Systems Volume 25, Number 1, January 2020 , pages 47-56 DOI: https://doi.org/10.12989/sss.2020.25.1.047 |
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Feasibility study on model-based damage detection in shear frames using pseudo modal strain energy |
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M. Mohamadi Dehcheshmeh, A. Zare Hosseinzadeh and G. Ghodrati Amiri
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| Abstract | ||
| This paper proposes a model-based approach for structural damage identification and quantification. Using pseudo modal strain energy and mode shape vectors, a damage-sensitive objective function is introduced which is suitable for damage estimation and quantification in shear frames. Whale optimization algorithm (WOA) is used to solve the problem and report the optimal solution as damage detection results. To illustrate the capability of the proposed method, a numerical example of a shear frame under different damage patterns is studied in both ideal and noisy cases. Furthermore, the performance of the WOA is compared with particle swarm optimization algorithm, as one the widely-used optimization techniques. The applicability of the method is also experimentally investigated by studying a six-story shear frame tested on a shake table. Based on the obtained results, the proposed method is able to assess the health of the shear building structures with high level of accuracy. | ||
| Key Words | ||
| damage detection; shear frame; pseudo modal strain energy; mode shape; whale optimization algorithm | ||
| Address | ||
| (1) M. Mohamadi Dehcheshmeh: School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran; (2) A. Zare Hosseinzadeh: School of Civil Engineering and Environmental Science, University of Oklahoma, Norman, OK, USA; (3) G. Ghodrati Amiri: Center of Excellence for Fundamental Studies in Structural Engineering, School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran. | ||