期刊
APPLIED MATHEMATICAL MODELLING
卷 66, 期 -, 页码 728-744出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.apm.2018.10.005
关键词
Moving vehicle; Discrete wavelet transform; Adaptive-scale; Wavelet finite element; Model updating
资金
- National Key Research and Development Program of China [2016YF0701400]
- Natural Science Foundation of China [51878234, 51508145, 51478159]
- Innovation and Technology Commission of the HKSAR Government [1-BBY5]
- Research Institute for Sustainable Urban Development [1-ZVBN]
This paper proposes a damage detection method with two phases, namely, localization and quantification, for beam structures subjected to moving load and successfully validates it via a laboratory experiment. Firstly, the discrete wavelet transform (DWT) is applied to decompose the displacement response change induced by a moving vehicle and locate potential structural damages. Then adaptive-scale wavelet finite element model (WFEM) updating is employed to estimate the damage severity in the identified damage regions in a progressive fashion. The elemental scales of WFEM are adaptively changed according to not only the moving vehicle position but also the progressively identified damage regions. Such a method can effectively minimize the number of modeling degree-of-freedoms (DOFs) and updating parameters during optimization. The feasibility and effectiveness of the proposed method is examined through a laboratory experiment with different damage scenarios. The results indicate the proposed method can achieve good consistency between structural modeling, damage scenarios, and load conditions, as well as an optimal tradeoff between damage detection accuracy and efficiency. (C) 2018 Elsevier Inc. All rights reserved.
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