Structural Health Monitoring for Multi-story Shear Frames Based on Signal Processing Approach

  • Hossein Rahami
  • Gholamreza Ghodrati Amiri
  • Hamed Amini Tehrani
  • Mostafa Akhavat
Research Paper
  • 34 Downloads

Abstract

Non-destructive vibration-based global structural health monitoring and damage detection methods are divided into modal-based and signal-based methods. There is much research in these areas, but each one has some advantages and disadvantages. The combination of these two areas can greatly overcome these disadvantages and thus can enhance the robustness of the damage detection methods. This article presents a signal-modal-based structural health monitoring technique for multi-story shear buildings subjected to an earthquake event. The proposed method utilizes the combination of wavelet transform and FFT as signal processing tools and also Hilbert transform with the aim of final modal parameters extraction, in order to determine the existence, location, and extent of damage in the multi-story shear frames. In fact, extraction of final modal parameters from the acceleration response signals is desired. To demonstrate the capabilities of the proposed algorithm, numerical simulations are performed on a four-story two-bay and ten-story two-bay shear frame with different damage scenarios using OpenSees. The results show that this method can detect the occurrence, location, and severity of the damage with good accuracy even in different levels of multi-damage scenarios and also in the presence of measurement noise.

Keywords

Structural health monitoring Wavelet transform Signal processing Hilbert transform Multi-story shear frames 

Notes

Acknowledgement

Hossein Rahami is grateful to the University of Tehran for financial support.

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Copyright information

© Shiraz University 2018

Authors and Affiliations

  1. 1.School of Engineering Science, College of EngineeringUniversity of TehranTehranIran
  2. 2.Centre of Excellence for Fundamental Studies in Structural EngineeringIran University of Science and TechnologyTehranIran
  3. 3.School of Civil EngineeringIran University of Science and TechnologyTehranIran

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