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Numerical modeling of damage detection in concrete beams using piezoelectric patches
Institution:1. Mechanics of Adaptive Systems, Ruhr University Bochum, Germany;2. Faculty of Civil Engineering and Architecture, University Nis, Serbia;1. Shandong Provincial Key Lab. of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China;2. Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208, United States;3. School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;1. Ruhr-Universität Bochum, Mechanik adaptiver Systeme, Institut Computational Engineering, ICFW 03-523, Universitätsstr.150, D-44801 Bochum, Germany;2. Ruhr-Universität Bochum, Mechanik adaptiver Systeme, ICFW 03-725, Universitätsstr. 150, D-44801 Bochum, Germany;1. Faculty of Engineering and Applied Sciences, Universidad de los Andes, Santiago, Chile;2. Mechanics of Adaptive Systems, Department of Civil and Environmental Engineering, Ruhr-Universität Bochum, Germany;1. School of Architectural Engineering, Technical University of Crete, Chania 73100, Greece;2. Department of Civil Engineering, Democritus University of Thrace, Xanthi 67100, Greece;1. Department of Civil and Environmental Engineering, Faculty of Engineering, National University of Singapore, Singapore 117576, Singapore;2. Department of Engineering Structures and Mechanics, School of Science, Wuhan University of Technology, Wuhan 430070, PR China
Abstract:Research and development of active monitoring systems for reinforced concrete structures should lead to improved structural safety and reliability. Numerical models of active monitoring and damage detection systems can help in the development and implementation of these systems. Modeling of damage detection process in a concrete beam with piezoelectric sensors/actuators based on wave propagation is investigated in this paper. Numerical modeling process is divided into two parts: (1) piezoelectric smart aggregates (SA), and (2) wave propagation models. Displacement obtained in the SA model is used as an input parameter for the modeling of wave propagation. Wavelet analysis is used as a signal processing tool and the damage index is calculated based on the wave energy. In this paper root-mean-square deviation (RMSD) damage index is used. Damage indices obtained by this numerical analysis are compared with experimental results. Very good fit between the finite element (FE) results and experimental results confirm a good FE approach of this problem.
Keywords:Piezoelectricity  Smart aggregates  Health monitoring  Modeling  Wave propagation  Concrete  Damage detection
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