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工程力学  2014 

钢管混凝土柱-钢梁平面框架耐火性能的参数研究

DOI: doi:10.6052/j.issn.1000-4750.2012.12.0983

Keywords: 火灾,钢管混凝土,平面框架,耐火极限,耐火性能

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Abstract:

该文建立了局部火灾下钢管混凝土柱-钢梁平面框架耐火性能分析的有限元计算模型,计算结果与实测结果吻合较好.考虑火灾发生位置及蔓延范围、钢梁高度、钢梁加劲肋的设置、梁荷载大小、柱轴压比等参数变化,对钢管混凝土框架结构的变形和内力重分布规律、破坏形态、破坏机理和耐火极限进行了详细的参数研究.研究表明:火灾作用位置对框架耐火极限有影响,梁荷载对框架耐火极限影响较大,而轴压比对框架耐火极限影响不大.

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