Experimental assessment of the flexural behavior of concrete slab reinforced with hybrid type of rebars
الباحث الأول:
Sundus A. Shukur
الباحثين الآخرين:
Hayder H. Alkhudery
المجلة:
AIP Publishing AIP Conference Proceedings, EISSN:1551-7616 PISSN:0094-243X
تاريخ النشر:
26 يوليو، 2023
مختصر البحث:
A hybrid rebar Steel Fibre Composite Bar (SFCB) is a composite rebar made of a conventional steel bar wrapped by Carbon fibre-reinforced polymer (CFRP) sheets. The characteristics of this hybrid rebar are a combination of the advantages and attribut…
A hybrid rebar Steel Fibre Composite Bar (SFCB) is a composite rebar made of a conventional steel bar wrapped by Carbon fibre-reinforced polymer (CFRP) sheets. The characteristics of this hybrid rebar are a combination of the advantages and attributes of both materials was made from. This paper introduces the manual techniques that were used to produce this hybrid rebar, which has a conventional round steel bar inside its core and CFRP outside. Then, the flexural behaviour of the Hybrid rebars used to reinforce Concrete slabs was tested, evaluated and compared with the slabs reinforced by conventional steel bars. The experimental works also test the effects of the thickness of the slab, length of the CFRP sheet wrapped around the steel barn different compressive strengths (Normal concrete and Reactive Powder concrete). The test results showed that the bars, hybrid rebars percentage used, and using two types of concrete with increasing the thickness of slab model from 100 to 120 mm of the control slabs, caused increasing in the ultimate distributed lead by 10.41% besides the changing of concrete type of the control slabs from the normal concrete to Reactive Powder Concrete increased the ultimate distributed load to reaches 12.5% The experimental results indicated also that the that wring hybrid rebar as internal reinforcement improved that ultimate distributed load capacity by approximately (28.3%, 37.5% to 40.74%) in comparison with the reference slabs of the specimen specimens with thickness of 120mm, 100mm and the RPC slabs respectively. Regarding the first crack load, no change was recorded in first cracking load in comparison with control specimen with a 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 a thickness of 120 mm and RPC specimens, the increasing came as 25% compared with the reference specimens. No influence on the maximum deflection was indicated for all specimens. The specimens with an internal hybrid reinforcement system and the Hybridisation length of (1050 mm), which represents the whole length of the bar, showed the ultimate load capacity
