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首页> 外文期刊>Advances in Structural Engineering >Dynamic analysis of concrete-filled steel tube composite frame against progressive collapse based on benchmark model
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Dynamic analysis of concrete-filled steel tube composite frame against progressive collapse based on benchmark model

机译：基于基准模型的钢管混凝土组合框架抗连续倒塌的动力分析

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摘要

To provide a unified assessment standard in both seismic analysis and progressive collapse analysis, a benchmark model with joint substructure for concrete-filled steel tube composite frame is developed and studied by alternative path method. The effects of failure period on dynamic response of the model and two types of dynamic increased factor are analyzed. Demand-capacity ratio is used to evaluate the progressive collapse behavior of the model. The results show that beyond 0.5 time of natural vibration period, the failure period has almost no effect on the dynamic response of the model. The peak moment-nominal moment capacity ratio of the beams connected to the removed column indicates that the closer the column gets to side column with pin connections, the more potential it has to trigger collapse. The bending stiffness of beam has little effect on the dynamic response of the model when it is greater than the doubled value. Displacement-based dynamic increased factor in linear static analysis is almost identical to load-based dynamic increased factor in linear static analysis in each case of column removal. Compared with the value of load-based dynamic increased factor, the value of displacement-based dynamic increased factor in nonlinear analysis is closer to the recommended value of 2.0 in GSA.
机译：为了在地震分析和渐进倒塌分析中提供统一的评估标准，开发了钢管混凝土组合框架联合子结构的基准模型，并通过替代路径方法进行了研究。分析了失效期对模型动态响应的影响以及两种动态增大因子。需求容量比率用于评估模型的渐进崩溃行为。结果表明，在自然振动周期的0.5倍以上，失效周期对模型的动力响应几乎没有影响。连接到卸下的色谱柱的梁的峰值弯矩-标称弯矩承载力比表明，采用销钉连接的色谱柱越靠近侧柱，它触发塌陷的可能性就越大。当梁的弯曲刚度大于倍增值时，对模型的动力响应几乎没有影响。在每种色谱柱去除情况下，线性静态分析中基于位移的动态增加因子与线性静态分析中基于载荷的动态增加因子几乎相同。与基于负荷的动态增加因子的值相比，非线性分析中基于位移的动态增加因子的值更接近GSA中的建议值2.0。

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