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钢管混凝土框架约束钢梁的耐火性能

Keywords: 约束钢梁,火灾,耐火性能,框架结构,破坏形态

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Abstract:

为了解决钢梁的抗火设计问题,利用壳单元建立了钢梁耐火性能分析的有限元计算模型,对火灾下钢梁的破坏形态、内力变化和变形规律进行了研究,并研究了梁端边界条件对钢梁耐火性能的影响规律.同时,还将两端固结梁的耐火性能与框架梁进行了对比分析.研究表明,梁端边界条件影响钢梁的破坏形态;与两端固结梁相比,火灾下框架梁中产生的轴压力较小.

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