钢筋混凝土在火灾中的破坏机制分析(英文)

Failure mechanisms of reinforced concrete slabs in fire

钢筋混凝土楼板由于材料退化和热膨胀的作用,在火灾条中的破坏机制与常温下有很大的区别,体现在应力分布、变形程度、局部破坏、极限承载力等方面。从数值分析的角度分析了钢筋混凝土楼板在火灾中的破坏机制,对爆裂防护位置提出了建议,并指出了过火结构健康检测时应注意的问题。

When a slab is subjected to fire attack,the material property degradation and thermal expansion make the failure mechanism quite different from that at ambient temperature in stress distribution,deformation,integrity failure and ultimate load resistance.In this research,the failure mechanism of RC slabs at ambient and in fire is studied analytically and numerically.The study on cracking mechanisms and spalling influence on the fire resistance of RC slabs in fire leads to a general understanding of failure mechanisms of RC slabs in fire and some recommendations on post-fire structural health monitoring and spalling prevention are given.