【摘要】 为揭示中空夹层钢管混凝土柱单边螺栓连接在地震作用下的动力特性和破坏模式,文章选取典型的中柱节点作为试验模型,进行方套方中空夹层钢管混凝土柱单边螺栓端板连接节点拟动力试验。研究柱截面空心率、端板形式以及采用可拆卸组合楼板对节点动力性能的影响。获得节点在各工况下的动力特性和破坏模式,分析构件最大位移时程曲线、最大加速度时程曲线、柱顶水平荷载-水平位移滞回曲线,获得阻尼比、刚度退化和累积滞回耗能等抗震性能指标的变化规律。试验结果表明,方套方中空夹层钢管混凝土柱单边螺栓端板连接节点具有优越的抗震性能和良好的延性,可以在高烈度地区的多高层装配式钢结构建筑中应用和推广。更多还原

【Abstract】 In order to investigate the dynamic response and failure mechanism of blind bolted connections in concrete filled double skin steel tubular(CFDST) columns, cruciform specimens representing the internal substructures of a multi-story frame were tested under seismic loads. Through the experimental results, the influence of end plate type, hollow ratio of column and demountable composite floor was analyzed. The dynamic response and failure modes of the test specimens were observed under different earthquake waves. The seismic performances, such as hysteretic behavior, dynamic magnification factor, damping ratio, stiffness degradation and energy dissipation capacity, were explored. The test results show that the blind bolted connections in the CFDST columns have good seismic performance and ductility, so they can be applied in high-rise assembled steel structures located in high-intensity earthquake areas.更多还原