Computers and Concrete

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Vibration-based method for story-level damage detection of the reinforced concrete structure

  • Mehboob, Saqib (Department of Civil Engineering, University of Engineering and Technology Taxila) ;
  • Zaman, Qaiser U. (Department of Civil Engineering, University of Engineering and Technology Taxila)
  • Received : 2020.08.09
  • Accepted : 2020.12.18
  • Published : 2021.01.25
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Abstract

This study aimed to develop a method for the determination of the damaged story in reinforced concrete (RC) structure with ambient vibrations, based on modified jerk energy methodology. The damage was taken as a localized reduction in the stiffness of the structural member. For loading, random white noise excitation was used, and dynamic responses from the finite element model (FEM) of 4 story RC shear frame were extracted at nodal points. The data thus obtained from the structure was used in the damage detection and localization algorithm. In the structure, two damage configurations have been introduced. In the first configuration, damage to the structure was artificially caused by a local reduction in the modulus of elasticity. In the second configuration, the damage was caused, using the Elcentro1940 and Kashmir2005 earthquakes in real-time history. The damage was successfully detected if the frequency drop was greater than 5% and the mode shape correlation remained less than 0.8. The results of the damage were also compared to the performance criteria developed in the Seismostruct software. It is demonstrated that the proposed algorithm has effectively detected the existence of the damage and can locate the damaged story for multiple damage scenarios in the RC structure.

Keywords

Acknowledgement

The authors are grateful to Higher Education Commission (HEC) Pakistan for entrusting and awarding this project (ID # NRPU3820), for developing an easy-to-handle SHM technique having the capability to encounter the common building (RC frame) structures situated in Pakistan and surely it would likewise be utilized in the other areas of the world.

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