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THE INFLUENCE OF HORIZONTAL RElNFORCEMENT RATIO ON SEISMIC BEHAVIOR OF STEEL CONCRETE BEAM
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摘要: 为揭示横向配箍率对组合梁抗震性能的影响规律,对低周反复荷载作用下10榀不同横向配箍率钢-混凝土组合梁进行试验研究,对不同横向配箍率钢-混凝土组合梁的破坏形态、滞回规律、耗能能力、刚度退化规律和延性等抗震性能进行深入分析,观测和记录试验中组合梁的纵向裂缝情况,根据试验研究与分析结果,建议钢-混凝土组合梁正弯矩区横向配箍率在0.5%~0.7%,而负弯矩区的横向配箍率在0.7%~0.8%。Abstract: For researching the influence of horizontal reinforcement ratio on seismic behavior of steel-concrete beams,experiments are conducted on ten specimens of composite steel-concrete beams under the repeated and cyclic loadings.With the results of these experiments,it is analyzed that breaking appearance,hysteresis curves,ductility and other seismic behavior of steel-concrete beams and written down the time when longitudinal cracking appeared in concrete flange in tension.By researching the experimental results,it is suggested that the rational horizontal reinforcement ratio of steel-concrete beam in positive moment area should be 0.5% to 0.7% and in negative moment area be 0.7% to 0.8%.
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