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型钢再生混凝土柱-钢梁组合框架节点恢复力模型试验研究
EXPERIMENTAL STUDY ON RESTORING FORCE MODEL OF COMPOSITE FRAME INTERIOR JOINTS CONSISTING OF SRRC COLUMNS AND S BEAMS
投稿时间: 2017-04-09  最后修改时间: 2017-05-16
DOI:
中文关键词:  型钢再生混凝土柱  钢梁  节点  抗震性能  恢复力模型
英文关键词:Steel reinforced recycled concrete columns  Steel beams  Joints  Seismic performance  Restoring force model
基金项目:
作者单位E-mail
马辉 西安理工大学 mahuiwell@163.com 
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中文摘要:
      为了建立型钢再生混泥土柱-钢梁组合框架中节点的恢复力模型,进行了5个组合框架节点试件的低周反复荷载试验,观察试件破坏过程及形态特征,获取各试件的滞回曲线和骨架曲线,重点分析其滞回性能和抗震性能,试验结果表明,各节点试件均发生典型的剪切破坏形态,受力过程大致经历了弹性段、带裂缝工作段、屈服强化段及破坏4个阶段,节点滞回曲线呈较为饱满的梭形,位移延性系数均值为3.29,表现出较好的抗震性能。在此基础上,考虑节点试件受力特征,建立了适合型钢再生混凝土柱-钢梁组合框架节点的四折线恢复力模型,该模型包括骨架曲线模型、刚度退化规律及滞回规则,计算曲线与试验曲线吻合较好,能够很好反映该节点在低周反复荷载作用下的滞回特性,研究结论可为该节点抗震设计提供一定参考。
英文摘要:
      In order to set up the restoring force model of composite frame interior joints consisting of SRRC columns and S beams, five composite frame joints were tested under low cyclic loading.The failure processes and characteristics of specimens were observed and the hysteresis loops and skeleton curves were obtained. On that basis, the hysteretic behavior and seismic behavior were analyzed in detail. The test results show that the failure mode of specimens is the typical shear failure. The stress process is roughly subjected to four stages of elastic period, working with crack period, yield reinforcement period and failure period. The hysteresis loops of joints are spindle-shaped and more full. The average value of ductility factor is 3.29, which shows that the joints have good seismic performance. On the basis of test research, considering the mechanical characteristics of specimens, a four-fold line restoring force model of composite frame interior joints consisting of SRRC columns and S beams was established, which included the skeleton curve model, the law of stiffness degradation and hysteresis rules. The calculation curves are in good agreement with the test curves, which can well reflect the hysteretic behavior of specimens under low cyclic loading. The research conclusion can be used as a reference for seismic design of the composite frame joints.
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