Performance Evaluation of One-Way Concrete Slabs Reinforced with New Developed GFRP Bars

Abstract

The incorporation of fiber-reinforced-polymer (FRP) bars in construction as a replacement to steel bars provides a superior material which is capable to overcome corrosion problems. However, serviceability requirements are important issues to be considered in the design of concrete elements reinforced with glass-FRP (GFRP) bars which are known to have larger deflections and wider crack widths as well as weaker bond compared with steel reinforced concrete. As a solution to this problem, square GFRP bars are proposed. This paper presents the results of an experimental investigation that was performed, in which newly developed square and circular GFRP bars were fabricated in the lab. Also, the GFRP bars were tested and used to reinforce concrete slabs. A total of nine full-scale GFRP-reinforced concrete (RC) one-way slabs were constructed, tested and analyzed, considering the most influencing parameters such as the cross sectional shape of GFRP bars, reinforcement ratio, the concrete characteristics strength, and adding polypropylene fibers to the concrete mixture. The test results were showed that, the tested slabs with GFRP square bars improved the deflection and cracking behavior as well as the ultimate load.

A critical review of the effect of concrete composition on rebar–concrete interface (RCI) bond strength: A case study of nanoparticles

“…Inadequate bond illustrating by the rebar pull-out results in the formation of much larger cracks, as well as premature failure of the beam [22]. Regarding shells in RC frame, many experimental studies reported that bond-slip phenomenon directly affects the failure displacement and mode of RC slabs [23][24][25][26]. This fact was severally confirmed by numerical Fig.…”

Deflection of GFRP-reinforced concrete beams

“…The short-term behavior of GFRP-reinforcement concrete members has been demonstrated by a number of tests. [1][2][3][4][5][6][7][8] In comparison to the large database of publications dealing with short-term loading, the investigation of long-term properties of GFRP-reinforced concrete members is insufficient. The extension of this method of application in central Europe is confined because there are evident differences between the short and long-term behavior of these members.…”