Rehabilitation of rectangular simply supported RC beams with shear deficiencies using CFRP composites

Ahmed Khalifa; Antonio Nanni

doi:10.1016/S0950-0618(02)00002-8

Rehabilitation of rectangular simply supported RC beams with shear deficiencies using CFRP composites

Ahmed Khalifa, Antonio Nanni

Research output: Contribution to journal › Article › peer-review

201 Scopus citations

Abstract

The present study examines the shear performance and modes of failure of rectangular simply supported reinforced concrete (RC) beams designed with shear deficiencies. These members were strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets and evaluated in the laboratory. The experimental program consisted of twelve full-scale RC beams tested to fail in shear. The variables investigated within this program included steel stirrups, and the shear span-to-effective depth ratio, as well as amount and distribution of CFRP. The experimental results indicated that the contribution of externally bonded CFRP to the shear capacity was significant. The shear capacity was also shown to be dependent upon the variables investigated. Test results were used to validate a shear design approach, which showed conservative and acceptable predictions.

Original language	English (US)
Pages (from-to)	135-146
Number of pages	12
Journal	Construction and Building Materials
Volume	16
Issue number	3
DOIs	https://doi.org/10.1016/S0950-0618(02)00002-8
State	Published - Apr 2002
Externally published	Yes

Keywords

Carbon fiber reinforced polymer
Rehabilitation
Shear

ASJC Scopus subject areas

Civil and Structural Engineering
Materials Science(all)

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10.1016/S0950-0618(02)00002-8

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title = "Rehabilitation of rectangular simply supported RC beams with shear deficiencies using CFRP composites",

abstract = "The present study examines the shear performance and modes of failure of rectangular simply supported reinforced concrete (RC) beams designed with shear deficiencies. These members were strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets and evaluated in the laboratory. The experimental program consisted of twelve full-scale RC beams tested to fail in shear. The variables investigated within this program included steel stirrups, and the shear span-to-effective depth ratio, as well as amount and distribution of CFRP. The experimental results indicated that the contribution of externally bonded CFRP to the shear capacity was significant. The shear capacity was also shown to be dependent upon the variables investigated. Test results were used to validate a shear design approach, which showed conservative and acceptable predictions.",

keywords = "Carbon fiber reinforced polymer, Rehabilitation, Shear",

author = "Ahmed Khalifa and Antonio Nanni",

note = "Funding Information: This work was conducted with partial support from the University Transportation Center on Advanced Materials and Non-Destructive Testing (NDT) Technologies based at the University of Missouri, Rolla. The Egyptian Cultural and Educational Bureau, Washington, DC, provided support to the first author. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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AU - Khalifa, Ahmed

AU - Nanni, Antonio

N1 - Funding Information: This work was conducted with partial support from the University Transportation Center on Advanced Materials and Non-Destructive Testing (NDT) Technologies based at the University of Missouri, Rolla. The Egyptian Cultural and Educational Bureau, Washington, DC, provided support to the first author. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2002/4

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N2 - The present study examines the shear performance and modes of failure of rectangular simply supported reinforced concrete (RC) beams designed with shear deficiencies. These members were strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets and evaluated in the laboratory. The experimental program consisted of twelve full-scale RC beams tested to fail in shear. The variables investigated within this program included steel stirrups, and the shear span-to-effective depth ratio, as well as amount and distribution of CFRP. The experimental results indicated that the contribution of externally bonded CFRP to the shear capacity was significant. The shear capacity was also shown to be dependent upon the variables investigated. Test results were used to validate a shear design approach, which showed conservative and acceptable predictions.

AB - The present study examines the shear performance and modes of failure of rectangular simply supported reinforced concrete (RC) beams designed with shear deficiencies. These members were strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets and evaluated in the laboratory. The experimental program consisted of twelve full-scale RC beams tested to fail in shear. The variables investigated within this program included steel stirrups, and the shear span-to-effective depth ratio, as well as amount and distribution of CFRP. The experimental results indicated that the contribution of externally bonded CFRP to the shear capacity was significant. The shear capacity was also shown to be dependent upon the variables investigated. Test results were used to validate a shear design approach, which showed conservative and acceptable predictions.

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