Reliability Analysis of Corroded Reinforced Concrete Beams Using Enhanced HL-RF Method

Document Type : Research Papers

Authors

1 Lecture, Department of Civil Engineering, Farsan Branch, Islamic Azad University, Farsan, Iran

2 Assistant Professor, Department of Civil Engineering, University of Zabol, P.O.Box: 9861335-856, Zabol, Iran.

Abstract

Steel corrosion of bars in concrete structures is a complex process which leads to the reduction of the cross-section bars and decreasing the resistance of the concrete and steel materials. In this study, reliability analysis of a reinforced concrete beam with corrosion defects under the distributed load was investigated using the enhanced Hasofer-Lind and Rackwitz-Fiessler (EHL-RF) method based on relaxed approach. Robustness of the EHL-RF algorithm was compared with the HL-RF using a complicated example. It was seen that the EHL-RF algorithm is more robust than the HL-RF method. Finally, the effects of corrosion time were investigated using the EHL-RF algorithm for a reinforced concrete beam based on flexural strength in the pitting and general corrosion. The model uncertainties were considered in the resistance and load terms of flexural strength limit state function. The results illustrated that increasing the corrosion time-period leads to increase in the failure probability of the corroded concrete beam.

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References

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Civil Engineering Infrastructures Journal
Volume 48, Issue 2 - Serial Number 2
December 2015
Pages 297-304

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History

  • Receive Date: 03 May 2014
  • Revise Date: 24 August 2015
  • Accept Date: 30 August 2015

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