冷成型钢复合墙体受火传热模拟研究

Research on Heat Transfer Simulation of Cold-formed Steel Composite Walls under Fire Conditions

近年来,冷成型钢结构在我国不断推广和应用,耐火性能是此类结构防火设计的重要指标,受到研究人员广泛关注。此类结构的竖向构件冷成型钢复合墙体通常由钢龙骨和覆面板材组合而成,覆面板材对于延缓龙骨温升至关重要,而开展耐火试验来研究复合墙体的耐火性能相对耗时费力。该文针对不同构造形式的墙体建立受火传热模型,通过与国内外学者开展的不同火灾环境下墙体的试验结果进行对比,验证了模型对于不同火灾环境的适用性;此外,针对内填充墙体的数值仿真提出了一种更符合工程实际的模型构造形式,可为设计人员提供方便。

In recent years,with the continual promotion and application of cold-formed steel structures,fire resistance becomes an important index for the fire protection design of such structures,which has been widely concerned by researchers.The cold-formed steel(CFS)composite walls,the vertical component of the structures,are usually composed of steel joists and wall panels.The wall panels are very important to delay the temperature rise of the joists,but it is relatively time-consuming and laborious to conduct fire resistance tests to study the fire resistance performance of composite walls.This paper established fire heat transfer models for walls with different structural forms,and compared with the test results of walls under different fire environments obtained by scholars at home and abroad,thereby verifying the applicability of the model to different fire environments;In addition,for the numerical simulation of inner filled walls,a more practical model construction form for composite engineering was proposed,providing some reference for designers.