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Title |
Experimental Study for GFRP Reinforced Concrete Beams without Stirrups
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Keywords |
GFRP 보강근 ; 전단무보강 ; 파괴유형 ; 전단지간비 ; 전단강도 ; 유효보강근비 GFRP bar ; Without stirrup ; Failure mode ; Shear span-depth ratio ; Shear strength ; Effective reinforcement ratio |
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Abstract |
This paper evaluates the shear strength, behavior and failure mode of reinforced concrete beams with deformed GFRP reinforcing bar. Four concrete beam specimens were constructed and tested. It was carried out to observe failure behavior and load-deflection of simply supported concrete beams subjected to four-point monotonic loading. In order to eliminate of the uncertainty by the shear reinforcements, any stirrups were not used. Variables of the specimens were shear span-depth ratio, effective reinforcement ratio. The dimensions of specimen is 3,300 or 1,950mm × 200mm × 240mm. Clear span and shear span were 2,900mm, 1,000mm respectively. Shear span-depth ratios were 6.5 and 2.5. Effective ratios of Longitudinal GFRP reinforcing bar were 1.126??, 2.250??, 3.375?? and 0.634??. All beam specimens were broken by diagonal-tension shear and the ACI 440.1R, CSA S806 and ISIS, which was used to design test beams, showed considerable deviation between prediction and test results of shear strengths.
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