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文章以整体结构为对象,以有限元分析软件ANSYS为平台,采用基于计算的结构抗火设计方法,本文通过对空间钢框架的温度-结构耦合计算,进行火灾情况下钢结构全过程反应分析,判断出火灾下结构的薄弱部位,考察受火构件与非受火构件的相互影响,更加真实地反映出结构的抗火性能。并给出了钢梁抗火的概念设计的建议。
Taking the whole structure as the object and the finite element analysis software ANSYS as the platform, the structural fire-proof design method based on calculation is adopted. Based on the temperature-structure coupling calculation of the space steel frame, the whole steel structure reaction analysis under fire condition is carried out. Judging the weak parts of the structure under fire and examining the interaction between fire-affected components and non-fire-affected components, the fire resistance performance of the structure is more truly reflected. The concept of fire resistant design of steel beam is also given.