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马辉*,孙书伟,毛肇玮,刘云贺,董静.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[J].实验力学,2018,33(6):938~948
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 nodes of SRRC columns and steel beams
投稿时间: 2017-04-09  最后修改时间: 2017-05-16
DOI:10.7520/1001-4888-17-089
中文关键词:  型钢再生混凝土柱(SRRC)  钢梁  节点  抗震性能  恢复力模型
英文关键词:steel reinforced recycled concrete(SRRC) columns  steel beams  node  seismic performance  restoring force model
基金项目:国家自然科学基金项目(51408485),中国博士后科学基金资助项目(2015M572584),住房和城乡建设部科学技术计划项目(2015-K2-011),陕西省自然科学基础研究计划项目(2016JQ5024),陕西省住房城乡建设科学技术计划项目(2015-K129),西安理工大学科学研究计划项目(2016CX028)
作者单位
马辉* 西安理工大学 土木建筑工程学院 陕西西安 710048 
孙书伟 西安理工大学 土木建筑工程学院 陕西西安 710048 
毛肇玮 西安理工大学 土木建筑工程学院 陕西西安 710048 
刘云贺 西安理工大学 土木建筑工程学院 陕西西安 710048 
董静 西安理工大学 土木建筑工程学院 陕西西安 710048 
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中文摘要:
      为了建立型钢再生混凝土柱-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,能够很好反映型钢再生混凝土柱-钢梁组合框架节点在低周反复荷载作用下的滞回特性。本文研究结果可为节点抗震设计提供一定参考。
英文摘要:
      In order to establish restoring force model of nodes in composite frame consisted of steel reinforced recycled concrete (SRRC) columns and steel beams, low cycle repeated load experiment for five composite frame node specimens was carried out.The failure processes and morphological characteristics of specimens were observed; the hysteresis loops and skeleton curves of each specimen were obtained; and the hysteretic behavior and seismic behavior were speciallly analyzed. Experimental results show that the typical shear failure pattern occurs in each node specimen, and the stress process has experienced four stages: elastic stage, working stage with cracks, yielding strengthening stage and failure stage. The hysteresis loops of node presents a relatively full fusiformis shape. The average displacement ductility coefficient is 3.29, showing good seismic performance. On the basis, considering the stress characteristics of node specimens, a four broken line restoring force model for steel reinforced recycled concrete column-steel beam composite frame nodes is established This model includes skeleton curve model, the stiffness degradation pattern and hysteresis rules. The calculation curve is in good agreement with experimental curves, which can well reflect the hysteretic behavior of nodes subjected to low cyclic repeated loading. Above results can be used as a reference for seismic design of composite frame nodes.
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