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Smart Structures and Systems
  Volume 25, Number 5, May 2020, pages 605-617

An efficient hybrid TLBO-PSO-ANN for fast damage identification in steel beam structures using IGA
S. Khatir, T. Khatir, D. Boutchicha, C. Le Thanh, H. Tran-Ngoc, T.Q. Bui, R. Capozucca and M. Abdel-Wahab

    The existence of damages in structures causes changes in the physical properties by reducing the modal parameters. In this paper, we develop a two-stages approach based on normalized Modal Strain Energy Damage Indicator (nMSEDI) for quick applications to predict the location of damage. A two-dimensional IsoGeometric Analysis (2D-IGA), Machine Learning Algorithm (MLA) and optimization techniques are combined to create a new tool. In the first stage, we introduce a modified damage identification technique based on frequencies using nMSEDI to locate the potential of damaged elements. In the second stage, after eliminating the healthy elements, the damage index values from nMSEDI are considered as input in the damage quantification algorithm. The hybrid of Teaching-Learning-Based Optimization (TLBO) with Artificial Neural Network (ANN) and Particle Swarm Optimization (PSO) are used along with nMSEDI. The objective of TLBO is to estimate the parameters of PSO-ANN to find a good training based on actual damage and estimated damage. The IGA model is updated using experimental results based on stiffness and mass matrix using the difference between calculated and measured frequencies as objective function. The feasibility and efficiency of nMSEDI-PSO-ANN after finding the best parameters by TLBO are demonstrated through the comparison with nMSEDI-IGA for different scenarios. The result of the analyses indicates that the proposed approach can be used to determine correctly the severity of damage in beam structures.
Key Words
    IsoGeometric Analysis; damage identification; TLBO; PSO-ANN; dynamic analysis
(1) S. Khatir, C. Le Thanh, H. Tran-Ngoc:
Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 903, B-9052, Zwijnaarde, Belgium;
(2) T. Khatir:
Institute of Science and Technology, Naama University , Algeria;
(3) D. Boutchicha:
University of Science and Technology Oran, Algeria;
(4) C. Le Thanh:
Faculty of Civil Engineering, Open University, Ho Chi Minh City, Vietnam;
(5) H. Tran-Ngoc:
Department of Bridge and Tunnel Engineering, Faculty of Civil Engineering, University of Transport and Communications, Hanoi, Vietnam;
(6) T.Q. Bui:
Institute for Research and Development, Duy Tan University, Da Nang City, Vietnam;
(7) T.Q. Bui:
Tokyo Institute of Technology, Department of Civil and Environmental Engineering, Japan;
(8) R. Capozucca:
Universitá Politecnica delle Marche, Ancona, Italy;
(9) M. Abdel-Wahab:
Division of Computational Mechanics, Ton Duc Thang University, Ho Chi Minh City, Vietnam;
(10) M. Abdel-Wahab:
Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam.

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