平面钢框架防火保护层厚度的计算

The thickness of fire-protection layer of one plane steel frame

在综合国内外钢结构抗火性能研究的基础上,根据传热学的经典理论及有限元基本理论,利用有限元分析软件ABAQUS的热-应力耦合分析,采用欧洲规范建议的高温下钢材的物理性能和力学性能,分析并求解出平面钢框架的临界温度和耐火极限.在此基础上根据结构防火设计的要求,进行防火保护层厚度公式的推导.所研究的成果对真实火灾作用下钢结构抗火设计具有一定的指导意义和参考价值.

Based on national and international researches of the fire-resistant limit and critical temperature of steel structure, the fire-resistant limit and critical temperature of steel frame were analyzed and obtained according to the classical theory theory of calorific and the finite element analysis theory by utilizing the thermal-structural coupling analyses of ABAQUS, adopting the physical and mechanical performance of steel at high temperature. Then, a formula of computing the thickness of fire-protection layer for steel structure was deduced in accordance with the fire-protection designing requirement, which was applied to calculate the thickness of fire-protection layer for steel structure models. The researched results may provide valuable reference and guidance for the design of steel structure fire-resistance construction under the condition of real fire disaster.