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工程力学  2014 

火灾高温作用下钢结构倒塌分析

, PP. 121-124

Keywords: 钢结构,火灾,倒塌,碳氢化合物燃烧,火灾升温曲线

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Abstract:

为了研究结构在油气火灾条件下的连续倒塌行为,该文采用碳氢化合物燃烧的升温曲线,通过显式动力分析,对三层抗弯钢框架的完整失效过程进行了分析。给出了结构内部不同位置处构件内力、变形等随温度的变化情况。同时,采用标准升温曲线对结构进行加热,对比分析不同升温速度和最高温度对结构火灾行为产生的影响。分析结果表明,初始升温速率越快,达到的温度越高,结构就会越快的进入到失效状态,在分析研究中应注意对这两个因素加以考虑。

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