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工程力学  2013 

火灾下钢板剪力墙屈曲后的塑性极限分析

DOI: 10.6052/j.issn.1000-4750.2011.12.0879, PP. 115-121

Keywords: 塑性极限分析,屈曲后承载力,钢板剪力墙,温度拉力带模型TSM,抗火设计,石化炉体装备

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Abstract:

基于塑性极限分析理论,采用最小势能原理,提出了火灾下高温钢板剪力墙屈曲后的拉力带模型TSM(TemperatureStringModal),依据此假定推导了考虑变温场极限状态下钢板剪力墙屈曲后的水平承载力计算完全解,对火灾温度场下钢板剪力墙屈曲后强度进行了研究。利用上述方法对石化炉体装备的钢箱体结构进行了抗火极限分析和结构防火保护的优化设计。实例与数值模拟结果的对比表明该方法简单有效,可以为钢箱体结构抗火设计提供理论依据和实用的计算方法。

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