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Polymers 2013, 5(4), 1352-1361; doi:10.3390/polym5041352
Article

Strengthening of RC Slabs with Symmetric Openings Using GFRP Composite Beams

1
,
1
,
1
 and
2,*
1 School of Architecture & Civil Engineering, Kyungpook National University, Daegu 702-701, Korea 2 School of Architecture, Chosun University, Philmundaero, Dong-Gu, Gwangju 501-759, Korea
* Author to whom correspondence should be addressed.
Received: 28 October 2013 / Revised: 25 November 2013 / Accepted: 27 November 2013 / Published: 3 December 2013
(This article belongs to the Special Issue Fiber-Reinforced Polymer Composites in Structural Engineering)
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Abstract

This paper describes the results of experimental testing of glass fiber reinforced plastic (GFRP) composite beam strengthened reinforced concrete (RC) slabs with two symmetrical openings. Specimens, one-half scale, have been designed and fabricated to reflect the most common RC bathroom slab used in school buildings. The specimen had dimensions of 2000 mm (width) × 150 mm (thickness) × 3000 mm (length) were used with the two openings of 300 mm × 400 mm. The aim of this study is to investigate the most effective strengthening method using GFRP composite beams in slabs with openings for enhancing the load-carrying capacity and stiffness. Test results showed that the strengthened slabs seems to increase the load-carrying capacity by 29%, 21% and 12% over that of the control specimen for diagonal, parallel and surround strengthening respectively. Furthermore, test results showed that the diagonal-strengthened system is one of the most effective methods for strengthening an RC slab with openings in terms of load-carrying capacity, stiffness and crack patterns.
Keywords: RC slab; RC-strengthening; GFRP composite beam; crack pattern; failure mode RC slab; RC-strengthening; GFRP composite beam; crack pattern; failure mode
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Choi, Y.; Park, I.H.; Kang, S.G.; Cho, C.-G. Strengthening of RC Slabs with Symmetric Openings Using GFRP Composite Beams. Polymers 2013, 5, 1352-1361.

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