Identifying location and severity of multiple cracks in reinforced concrete cantilever beams using modal and wavelet analysis

Document Type : Original Article

Authors

1 MSc student in Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran

2 Assistant Professor, Department of Civil Engineering, Faculty of Engineering, University of Qom, Qom, Iran

3 Associate Professor, Faculty of Civil Engineering, Semnan University, Semnan, Iran

4 MSc student in Civil Engineering, Faculty of Civil Engineering, Semnan University, Semnan, Iran

Abstract

In this paper, a method of multiple cracks detection in a cantilever reinforced concrete beam based on wavelet transform is presented. For this purpose, different damage scenarios in concrete beam were considered. Then, the four first mode shapes of undamaged and damaged beam using ABAQUS software were extracted. The estimated mode shapes of the beam are analyzed by the continuous and discrete wavelet transform (CWT & DWT) to detect the damage scenarios. It was found that DWT is more sensitive to damage location than CWT in the concrete beam which introduced in this paper. Also, the influence of the mode order and the effect of damage distance from support on the effectiveness of damage detection was evaluated. It was observed that the distance of cracks to each other have no effect on identifying their location.

Keywords

References

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History

  • Receive Date: 12 November 2015
  • Revise Date: 28 April 2016
  • Accept Date: 05 June 2016

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