STUDY ON SHEAR RESISTANCE OF BFRP REINFORCED CONCRETE DEEP BEAMS WITHOUT STIRRUPS

Abstract

Abstract: In order to study the influence of different shear span ratio, reinforcement ratio and basalt fiber volume fraction on the deflection, cracking load and ultimate bearing capacity, 7 basalt fiber reinforced polymer (BFRP) reinforced concrete deep beams without stirrups were investigated, and the crack development and failure mode were analyzed. The research results can be obtained as follows. The failure mode of all beams is shear failure; Under the same load, the mid-span deflection of specimen can be improved by the increase of shear span ratio, while will be reduced by the increase of BFRP reinforcement ratio and basalt fiber volume fraction. The cracking load and ultimate load of beams are weakened with the shear span ratio increases, and will be increased with the increase of longitudinal reinforcement ratio and basalt fiber volume fraction. Calculation of shear capacity of test beams was performed by reference to relevant specifications, and it is found that shear design equations of the ACI 440. 1R-06 code were better predictions, the predications of CSA. S 806-12 code were more stable and the GB 50608—10 were relatively conservative. The ACI440.1R-06 code is suggested to be used to calculate the shear capacity of BFRP reinforced concrete deep beams without stirrups.

Key words: BFRP rebar, deflection, deep beam, failure mode, shear capacity

CLC Number:

TB332

ZHANG Zhi-jin, LIU Hua-xin, LI Qing-wen, WANG Xue-zhi. STUDY ON SHEAR RESISTANCE OF BFRP REINFORCED CONCRETE DEEP BEAMS WITHOUT STIRRUPS[J]. Fiber Reinforced Plastics/Composites, 2019, 0(1): 36-41.

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