Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion

The present study focuses on the torsional strengthening behavior of reinforced concrete (RC) box section beams that are widely used in bridges. Four RC box beams were fabricated, and three of them were wrapped by carbon fiber-reinforced polymer (CFRP) U-wrap strips with or without longitudinal s...

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Main Authors:	Ma, Shengqiang, Bunnori, N. Muhamad, Choong, K. K.
Format:	Article
Published:	EDP Sciences 2016
Subjects:	TA1-2040 Engineering (General). Civil engineering (General)
Online Access:	https://doi.org/10.1051/matecconf/20164702002 https://doi.org/10.1051/matecconf/20164702002 http://eprints.usm.my/38386/1/Behavior_of_Reinforced_Concrete_Box_Beam_Strengthened.pdf

id	usm-38386
recordtype	eprints
spelling	usm-383862018-01-16T04:57:18Z Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion Ma, Shengqiang Bunnori, N. Muhamad Choong, K. K. TA1-2040 Engineering (General). Civil engineering (General) The present study focuses on the torsional strengthening behavior of reinforced concrete (RC) box section beams that are widely used in bridges. Four RC box beams were fabricated, and three of them were wrapped by carbon fiber-reinforced polymer (CFRP) U-wrap strips with or without longitudinal strips. The different wrapping configuration, cracking angle, failure pattern, and tensile strain of fibers were investigated and discussed accordingly. The experimental results addressed that U-wrap strips strengthening also can upgrade the ultimate torque of beams moderately. In particular, using U-wrap and longitudinal strips to bond the box beams increased the torsional stiffness slightly. The same equation from different codes for calculating RC specimens can accurately predict the ultimate strength of the control beam, but the calculation of the fib model overestimated the torsional strengthening improvement of the wrapped specimens. However, Ghobarah et al. assumed approximately 3000με of the average ultimate fiber strain in calculating the ultimate strength of the wrapped box beams which shows in relatively appropriate agreement with testing results. EDP Sciences 2016-04 Article PeerReviewed application/pdf http://eprints.usm.my/38386/1/Behavior_of_Reinforced_Concrete_Box_Beam_Strengthened.pdf https://doi.org/10.1051/matecconf/20164702002 Ma, Shengqiang and Bunnori, N. Muhamad and Choong, K. K. (2016) Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion. MATEC Web of Conferences, 47 (02002). pp. 1-8. ISSN 2261-236X http://eprints.usm.my/38386/
institution	Universiti Sains Malaysia Universiti Sains Malaysia
repository_type	Digital Repository
institution_category	Local University
building	USM Repository
collection	Online Access
topic	TA1-2040 Engineering (General). Civil engineering (General)
spellingShingle	TA1-2040 Engineering (General). Civil engineering (General) Ma, Shengqiang Bunnori, N. Muhamad Choong, K. K. Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion
description	The present study focuses on the torsional strengthening behavior of reinforced concrete (RC) box section beams that are widely used in bridges. Four RC box beams were fabricated, and three of them were wrapped by carbon fiber-reinforced polymer (CFRP) U-wrap strips with or without longitudinal strips. The different wrapping configuration, cracking angle, failure pattern, and tensile strain of fibers were investigated and discussed accordingly. The experimental results addressed that U-wrap strips strengthening also can upgrade the ultimate torque of beams moderately. In particular, using U-wrap and longitudinal strips to bond the box beams increased the torsional stiffness slightly. The same equation from different codes for calculating RC specimens can accurately predict the ultimate strength of the control beam, but the calculation of the fib model overestimated the torsional strengthening improvement of the wrapped specimens. However, Ghobarah et al. assumed approximately 3000με of the average ultimate fiber strain in calculating the ultimate strength of the wrapped box beams which shows in relatively appropriate agreement with testing results.
format	Article
author	Ma, Shengqiang Bunnori, N. Muhamad Choong, K. K.
author_facet	Ma, Shengqiang Bunnori, N. Muhamad Choong, K. K.
author_sort	Ma, Shengqiang
title	Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion
title_short	Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion
title_full	Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion
title_fullStr	Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion
title_full_unstemmed	Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion
title_sort	behavior of reinforced concrete box beam strengthened with cfrp u-wrap strips under torsion
publisher	EDP Sciences
publishDate	2016
url	https://doi.org/10.1051/matecconf/20164702002 https://doi.org/10.1051/matecconf/20164702002 http://eprints.usm.my/38386/1/Behavior_of_Reinforced_Concrete_Box_Beam_Strengthened.pdf
first_indexed	2018-09-08T09:28:07Z
last_indexed	2018-09-08T09:28:07Z
_version_	1611031000311136256

Behavior of Reinforced Concrete Box Beam Strengthened with CFRP U-Wrap Strips Under Torsion

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