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工程力学  2014 

火灾下复杂拉力场钢板剪力墙屈曲后的上限塑性极限分析

DOI: 10.6052/j.issn.1000-4750.2013.10.0925, PP. 71-78

Keywords: 窄型钢板剪力墙,屈曲后承载力,复杂温度拉力带模型TSM,上限塑性极限分析,抗火设计

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Abstract:

基于塑性极限分析上限法理论,提出了火灾下高温复杂拉力场的窄型钢板剪力墙屈曲后的拉力带模型TSM(TemperatureStringModel),依据此假定推导了考虑变温场极限状态下窄型钢板剪力墙屈曲后的水平承载力计算上限解公式,对火灾温度场下窄型钢板剪力墙屈曲后强度进行了研究,还推导了火灾下复杂拉力场的两端不同温度场钢板剪力墙屈曲后的水平承载力计算上限解。利用上述方法对石化裂解炉的钢箱体结构进行了抗火极限分析。计算实例表明该方法简单有效,可以为不同火灾场景下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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