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建立了整体钢框架结构模型,采用有限元法对整体结构在火灾下的响应进行了数值模拟。对钢构件的应力和变形进行了弹塑性分析,得到了变形及应力随时间变化的云图和内力及挠度随时间变化的曲线。同时将不同约束条件下以及构件采取不同的保护措施时整体结构的响应进行了对比。为基于整体结构的耐火设计提供了有效的数值模拟方法。
The overall steel frame structure model was established. The finite element method was used to simulate the response of the whole structure under fire. The stress and deformation of the steel member were analyzed elastically, and the curves of the deformation and stress with time were obtained. The curves of the internal force and the deflection with time were obtained. At the same time, the response of the whole structure under different constraints and different protection measures was compared. It provides an effective numerical simulation method for fire-resistant design based on the whole structure.