| Reinforced concrete beam is the most common load carrier components during structure design and to analyze its shear mechanism is also the basis of shear-design.Common reinforced concrete beams show obviously brittle shear failure and poor seismic performance when under loading Hence it would bring a great many difficulties to repair them after the earthquake case. High ductile fiber reinforced concrete(HDC) is a new material of ductile deformation and strength both, which is applied to the structural components of key parts, can effectively improve the deformation capacity of the structure and avoid reducing the strength of the structure. Therefore, HDC is crucial to improve the seismic performance of structural elements, which has bright broad application prospects.In this paper, a high ductility fiber reinforced concrete beams for the research object, design and production of the 15 high ductile fiber reinforced concrete beam specimen and three ordinary concrete beam specimen for comparison. Via static monotonic loading test method describes the beam specimen destruction process,analyzing its failure modes; to confirm beam specimen cracking load, ultimate load,ultimate load, feature point, describing crack development situation, draw the load-deflection and trend of stress of reinforced strain graph; Analysis of shear-resistance mechanism of HDC with stirrups; a theoretical formula about bearing capacity for HDC with stirrups were proposed based on the MCFT(modified compression field theory);Various factors that affecting the Shear capacity of the HDC beams were analyzed,simplified formula of shear-resistance for HDC Beams, by calculating that, the experimental values are in good agreement with the calculated values. |
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