浅谈钢结构抗火设计

钢材虽为非燃烧材料，但不耐火，高温下其强度和刚度都将迅速降低，而火灾中升温迅速。故无防火保护的钢构件在火灾中极易受到破坏。因此，在钢结构抗火设计时必须考虑到：如何定量地确定防火保护措施，使得钢结构构件的耐火时间大于或等于规定的耐火极限。

A Brief Talk on Fire Resistant Design for Steel Structures

Though steel is non-burning,it is non-refractory, whose intensity and rigidity of frame steel will be decrease under the high temperature of the fire disaster.When the temperature is increasing quickly,the steel work will be destroyed easily without the protection of fire-proofing,therefore, the designing aim of steel frame fire-resistance is:how to quantitatively confirm the protectional measure in fire resistance in order to let the time of the fire resistance in steel work be longer or at least equal with the limit of fire endurance.