| Abstrakt: |
A Hybrid Steel/CFRP sheet (HSCFRP) rebar is a composite bar made of conventional steel bar wrapped by (CFRP) sheet. The characteristics of this hybrid rebar are a combination of the advantages and attributes of the both materials were made from. The manual technique used to produce HSCFRP rebar are described in this paper. Ten concrete slabs have been constructed and tested under uniform distributed load to evaluate and compare the flexural behavior of HSCFRP-reinforced concrete slabs to concrete slabs reinforced with conventional steel bars. The experimental works includes testing the effects of the thickness of the slab, length of the CFRP sheet wrapped the steel bars, and hybrid rebars percentage. According to the results, increasing slab thickness from 100 to 120 mm of the control slabs, caused increasing in the ultimate distributed load capacity by 10.2%. The experimental results indicated also that the using of HSCRP bars as internal reinforcement improved that ultimate distributed load capacity by approximately (36 % and 31 %) in comparison with the reference slabs of the specimens with thickness of 100mm and120mm, respectively. Regarding the first crack load, no change was recorded in first cracking load in comparison with control specimen with thickness of 100 mm, while, a noticeable increasing of the load that recorded the first cracking in comparison with control specimens, for the specimens with thickness of 120 mm, the increasing came as 25% compared with the reference specimen. The Optimum length of hybridization reinforced bar in terms of the ultimate load is two-thirds of the bar length. [ABSTRACT FROM AUTHOR] |
