Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Damage assessments of reinforced concrete shear walls using visual features of surface crack patterns

Document Type : Original Article

Authors
Mohammadjavad Hamidia 1
Sana Shahoveisi 2
Hamed Momeni 3
Kiarash Mohtasham Dolatshahi 4
1 َAssistant Professor, Department of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran
2 B. Sc. in Civil Engineering, Department of Civil Engineering, Sharif University of Technology
3 M. Sc. in Structural Engineering, Department of Civil Engineering, Sharif University of Technology
4 Associate Professor, Department of Civil Engineering, Sharif University of Technology
10.22065/jsce.2022.306462.2590
Abstract
The purpose of this study is to quantify the damage of reinforced concrete shear walls after the earthquakes. One of the most important tasks after earthquakes is to assess the buildings and make sure that they are safe to occupy. So far, this assessment is mostly conducted by visual inspection and measuring the crack width that is prone to error. Thus, automation of the damage assessment using image processing techniques can significantly improve the assessment accuracy. In this paper, a database comprising 236 images of 72 damaged walls at various drift levels is collected. The database covers a broad range of structural and geometric properties. The crack pattern associated with each wall and each drift ratio is one by one extracted manually, and the corresponding geometry indices of each crack pattern are calculated. The indices are assessed and the correlation with drift ratio is investigated. Finally, using symbolic regression, empirical equations are proposed that can predict the peak drift ratio that the wall has experienced during an earthquake using the crack pattern. Four scenarios are considered for obtaining the empirical equations. The predicted drift ratio along with fragility curves can finally be used to estimate the damage level of the walls.
Keywords
Reinforced concrete shear walls
Nondestructive evaluation
Structural health monitoring
Surface crack patterns
Image processing

Subjects

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Journal of Structural and Construction Engineering
Volume 9, Issue 8 - Serial Number 61
November 2022
Pages 20-39

  • Receive Date 08 October 2021
  • Revise Date 24 November 2021
  • Accept Date 27 January 2022