装配式复合箍筋约束高强混凝土柱恢复力模型研究

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摘要对6个装配式复合箍筋约束高强混凝土柱及1个现浇对比柱进行循环往复加载试验，主要研究了轴压比、配箍率对装配柱的骨架曲线及滞回特性的影响。试验结果表明：装配柱在骨架曲线及滞回特性上与现浇柱有着较为明显的特征差异；当轴压比减小或配箍率增大时，装配柱的滞回环变得丰满，初始刚度增加，承载力衰减速率减小，卸载刚度退化速率变慢。根据试验结果和现有恢复力模型理论，提出了考虑轴压比和配箍率影响的适用于装配柱的三折线恢复力模型。通过对骨架曲线特征参数的计算并与试验骨架曲线对比，两者吻合较好；在此基础上提出相应的滞回规则，计算得到的恢复力模型与装配柱滞回曲线较为一致，这表明所建议的恢复力模型可较好的反映出轴压比和配箍率对其滞回特性的影响，可为该装配柱的结构弹塑性分析及工程应用提供参考。

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	李升才1
	白巨巨2
	朱永甫3

关键词 ：复合箍筋, 高强混凝土柱, 装配式, 拟静力试验, 恢复力模型

Abstract：Six specimens of prefabricated high strength concrete columns confined by composite stirrup and one cast-in-situ control specimen were tested under cyclie lateral loads. The influences of axial compression ratio and volume-stirrup ratio on skeleton curve and hysteretic characteristics of the columns were main considered in the test. The test results show that the prefabricated column has obvious characteristic differences from the cast-in-place column in the skeleton curve and hysteresis characteristics; when the axial compression ratio decreases or the stirrup rate increases, the hysteresis loop of the prefabricated columns becomes fuller, the initial stiffness increases, the attenuation rate of the bearing capacity decreases, and the degradation rate of the unloading rigidity slows down. According to the test results and the existing theory of restoring force model, a three-fold line restoring force model suitable for prefabricated columns considering the influence of axial compression ratio and stirrup ratio is proposed. Calculating the characteristic parameters of the skeleton curve and comparing with the experimental skeleton curve, the two agree well; On this basis, the corresponding hysteresis rules are proposed. The calculated restoring force model is consistent with the hysteresis curve of the prefabricated column, which shows that the proposed restoring force model can better reflect the influence of the axial compression ratio and the stirrup ratio on its hysteretic characteristics.

Key words： composite stirrups high strength concrete columns prefabricated quasi-static experiment restoring force model

收稿日期: 2021-01-06 出版日期: 2022-05-28

引用本文:

李升才1，白巨巨2，朱永甫3. 装配式复合箍筋约束高强混凝土柱恢复力模型研究[J]. 振动与冲击, 2022, 41(10): 205-214.
LI Shengcai1,BAI Juju2,ZHU Yongfu3. Restoring force model of prefabricated high strength concrete columns confined by composite stirrups. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(10): 205-214.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I10/205

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