الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The use of Glass Fiber Reinforced Polymer (GFRP) bars has gained considerable interest as a tension reinforcement for concrete beams due to their high tensile strength and anti-corrosive performance. However, there are some concerns about using GFRP bars due to their linear stress-strain relationship as well as their lower modulus of elasticity. GFRP-reinforced concrete beams are more likely to exhibit brittle failure, large cracks, and severe deflections as compared to conventional ones. To mitigate such problems, a new composite system was utilized, making use of the pseudo-strain-hardening behaviour and superior crack control of Strain-Hardening Cementitious Composites (SHCC) material. In this work, tests on GFRP-reinforced SHCC/concrete composite beams were carried out.
Fourteen beams with constant dimensions, including one reference concrete beam, another SHCC beam, and twelve SHCC/concrete composite beams, were tested. The effects of the SHCC thickness, location (tension or compression zone), and the presence/absence of SHCC reinforcement on the ultimate capacity, deformation, and ductility were evaluated. Based on the experimental results, using the SHCC layer at compression improved the ultimate capacity and ductility of the GFRP-reinforced beams. The enhancement of the serviceability limits for the tested beams was significantly impacted by utilizing the SHCC layer at the tension zone. Prediction models were proposed to estimate the flexural strength as well as the deflection values of the GFRP-reinforced SHCC-concrete composite beams. The proposed models showed good agreement with the experimental results.