Damage Detection Using a Graph-based Adaptive Threshold for Modal Strain Energy and Improved Water Strider Algorithm

Authors

  • Ali Kaveh
    Affiliation

    Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology, Tehran 13114-16846, Iran

  • Parmida Rahmani
    Affiliation

    Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology, Tehran 13114-16846, Iran

  • Armin Dadras Eslamlou
    Affiliation

    Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology, Tehran 13114-16846, Iran

https://doi.org/10.3311/PPci.17903

Abstract

Damage detection through an inverse optimization problem has been investigated by many researchers. Recently, Modal Strain Energy (MSE) has been utilized as an index (MSEBI) for damage localization that serves to guide the optimization. This guided approach considerably reduces the computational cost and increases the accuracy of optimization. Although this index mostly exhibits an acceptable performance, it fails to find some damaged elements' locations in some cases. The aim of this paper is twofold. Firstly, a Graph-based Adaptive Threshold (GAT) is proposed to identify some of those elements that are not detected by basic MSEBI. GAT relies on the concepts from graph theory and MSE working as a simple anomaly detection technique. Secondly, an Improved version of the Water Strider Algorithm (IWSA) is introduced, applied to the damage detection problems with incomplete modal data and noise-contaminated inputs. Several optimization algorithms, including the newly-established Water Strider Algorithm (WSA), are utilized to test the proposed method. The investigations on several damage detection problems demonstrate the GAT and IWSA's satisfactory performance compared to the previous methods.

Keywords:

structural damage detection; modal strain energy; graph-based adaptive threshold; improved Water Strider Algorithm

Published Online

2021-11-02

How to Cite

Kaveh, A., Rahmani, P., Dadras Eslamlou, A. “Damage Detection Using a Graph-based Adaptive Threshold for Modal Strain Energy and Improved Water Strider Algorithm”, Periodica Polytechnica Civil Engineering, 65(4), pp. 989–1007, 2021. https://doi.org/10.3311/PPci.17903

Issue

Section

Research Article