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建立了单跨门式钢刚架整体结构的模型。基于大空间局部火灾下的升温曲线,采用有限元方法对结构进行了数值模拟,分别得到了整体结构在不同防火保护方式下的变形云图以及檩条和斜梁构件的挠度随时间变化的曲线。最后对该类结构的实用抗火设计提出建议。
The model of single-span steel rigid frame structure is established. Based on the temperature rise curve under large-area local fires, the finite element method is used to simulate the structure. The deformation cloud of the whole structure under different fire protection methods and the curves of deflection of purlin and skew beam with time are obtained respectively. Finally, we put forward suggestions on the practical fire-resistant design of such structures.