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Reliabilty-based Torsional Design of Reinforced Concrete Beams Strengthened with CFRP Laminate

Publish Year: 1392
Type: Journal paper
Language: English
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Document National Code:

JR_IJE-26-10_002

Index date: 7 June 2014

Reliabilty-based Torsional Design of Reinforced Concrete Beams Strengthened with CFRP Laminate abstract

The structural reliability of torsional concrete beams strengthened with full and strip wrapping of carbon fiber reinforced polymer (CFRP) laminate is investigated. The first order-second momentreliability method has been applied to make a reliability assessment on the torsional capacity designedby technical guideline in Iran. The code No.345 published by the Management and Planning Organization of Iran (MPO 345-2006) is the first technical code in Iran for design of concrete members strengthened with CFRP laminate. In this work, the average reliability indexes for unstrengthened,strengthened with full wrap and strengthened with strip wrap beams have been found. The results indicate that the MPO design guideline are some unconservative. A reliability strengthening ratio is introduced for assessment of the variation in average reliability index before and after strengtheningwith different resistance factors. A parametric study on this factor reveals that if the reliability level of the strengthened reinforced concrete beams is kept to be consistent with their similar unstrengthened beams, a value of 0.89 and 0.81 for strengthened with full wrap and strengthened with strip wrap, should be applied, respectively.

Reliabilty-based Torsional Design of Reinforced Concrete Beams Strengthened with CFRP Laminate Keywords:

Reliabilty-based Torsional Design of Reinforced Concrete Beams Strengthened with CFRP Laminate authors

h Dehghani

Department of Civil Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

m.j Fadaee

Department of Civil Engineering, Shahid Bahonar University of Kerman, Kerman, Iran