Behavior of FRP Bars-Reinforced Concrete Slabs under Temperature and Sustained Load Effects

Polymers

Radhouane Masmoudi¹  Mohamed Bouhicha²  Hizia Bellakehal²  Ali Zaidi² 

[1]Department of Civil Engineering, University of Sherbrooke, 2500, blvd Université, Sherbrooke, QC., J1K2R1, Canada

[2]Structure Rehabilitation and Materials Laboratory (SREML), University of Laghouat,Laghouat 03000, Algeria

关键词: FRP bars;    thermal load;    mechanical load;    freeze/thaw cycles;    concrete cover;   

DOI  :  10.3390/polym6030873

来源: DOAJ

【 摘 要 】

The large temperature variation has a harmful effect on concrete structures reinforced with fiber reinforced polymer (FRP) bars. This is due to the significant difference between transverse coefficient of thermal expansion of these bars and that of the hardened concrete. This difference generates a radial pressure at the FRP bar/concrete interface, and may cause splitting cracks within concrete. This paper presents results of an experimental and analytical study carried out on FRP-reinforced concrete slabs subjected, simultaneously, to thermal and mechanical loads. The analytical model based on the theory of linear elasticity consists to evaluate combined effects of thermal and mechanical loads on the transverse expansion of FRP bars. Parameters studied in this investigation are the concrete cover thickness, FRP bar diameter, and the temperature variation. The thermal cycles were varied from −30 to +60 °C. Comparisons between analytical and experimental results show that transverse strains predicted from the proposed model are in good correlation with experimental results.

【 授权许可】

Unknown