Shear behaviour of lightweight concrete beams strengthened with CFRP composite

Al-Allaf, MHF, Weekes, L and Augusthus Nelson, L ORCID: 0000-0003-3092-7635 2018, 'Shear behaviour of lightweight concrete beams strengthened with CFRP composite' , Magazine of Concrete Research .

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Abstract

This paper presents the experimental results obtained from lightweight and normal concrete beams with closed and U-shaped configurations of epoxy bonded Carbon FRP (CFRP) reinforcement in order to compare the shear resisting mechanisms between lightweight and normal concrete beams. The experimental results show that the CFRP can successfully be applied in the strengthening of lightweight concrete beams and the shear strength gained due to CFRP reinforcement for lightweight samples is less than the normal weight concrete samples while the mode of failures are the same. In contrast, diagonal shear cracks propagate through the lightweight aggregate compared to cracks around normal aggregate in the concrete matrix. Furthermore, the numerical study shows that the design guidelines to estimate the CFRP contribution, which do not differentiate the concrete types, overestimate the U-shaped CFRP contribution on lightweight concrete beams where the effective bond length of CFRP could not be achieved due to lower tensile strength of lightweight concrete.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: Magazine of Concrete Research
Publisher: Institution of Civil Engineers (ICE)
ISSN: 0024-9831
Related URLs:
Depositing User: L Augusthus Nelson
Date Deposited: 29 May 2018 13:03
Last Modified: 15 Aug 2018 16:15
URI: http://usir.salford.ac.uk/id/eprint/47134

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