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为了研究梁的配筋率与正截面破坏形式的关系,制作了三根不同配筋率的梁(适筋梁、超筋梁、少筋梁),通过观察和记录其受力至破坏的整个过程,得到了不同破坏形式梁的M—f曲线和M—ε曲线。实验结果表明:由于纵向受拉钢筋的配筋率ρ的不同,受弯构件有适筋、超筋、少筋三种正截面破坏形式,其中适筋梁充分利用了钢筋和混凝土的强度,且又有较好的塑性。
In order to study the relationship between the reinforcement ratio and the normal cross-section failure mode, three beams with different reinforcement ratio (proper reinforcement beam, super reinforcement beam and few reinforcement beam) were fabricated. Through observation and recording of the whole process from stress to failure , The M-f curve and M-ε curve of beams with different failure modes were obtained. The experimental results show that due to the different ratio of reinforcement ρ of the longitudinal tensile reinforcement, the flexural members have three kinds of normal cross-section failure modes, such as proper reinforcement, super-reinforcement and less reinforcement, of which, the strength of reinforcement and concrete is fully utilized Another good plasticity.