Jianzhu Gangjiegou Jinzhan本文以带钢筋混凝土楼板、采用外环板连接节点的三层三跨圆钢管混凝土（concrete filled steel tube，CFST）柱-钢梁平面框架为研究对象，从节点损伤角度对该类平面框架在火灾下的破坏机理展开研究。文中建立了足尺三层三跨CFST平面框架的耐火极限精细化有限元模型，并用相关试验数据验证了建模方法的准确性；基于底层受火危害大于高层受火危害、边柱受火危害大于中柱受火危害的原则，确定了12种典型的火灾工况，深入分析了不同火灾工况下CFST平面框架的破坏形式、温度变化、变形发展和内力变化。研究发现：
宋天诣, 赵国浩, 项凯
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