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细晶粒钢筋增强混凝土柱抗震性能试验研究

, PP. 162-166

Keywords: 混凝土柱,细晶粒钢筋,抗震,延性,耗能

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Abstract:

为研究细晶粒钢筋增强混凝土柱的抗震性能,进行了4根400MPa级细晶粒钢筋增强矩形截面混凝土柱的低周反复荷载试验,研究配筋率、轴压比、配箍率对混凝土柱抗震性能的影响。分析了试件的滞回曲线和骨架曲线,求出了各试件的特征参数和延性系数。结果表明,400MPa级细晶粒钢筋混凝土柱具有良好的抗震性能。随着配筋率的增加,屈服荷载和峰值荷载均相应提高,延性也相应提高;轴压比大的柱其水平峰值荷载相对较大,但骨架曲线超过荷载峰值点后的下降段部分较陡,延性较差;轴压比小的柱其水平峰值荷载相对较小,其骨架曲线超过荷载峰值点后的下降段部分较平缓,延性较好;随着体积配箍率的增加,试件抗震性能和延性均相应提高。

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