火灾科学
火災科學
화재과학
FIRE SAFETY SCIENCE
2011年
1期
1-8
,共8页
余新盟%查晓雄%HUANG Zhao-hui
餘新盟%查曉雄%HUANG Zhao-hui
여신맹%사효웅%HUANG Zhao-hui
楼板破坏机制%数值模拟%局部破坏%混凝土开裂%混凝土爆裂%结构抗火
樓闆破壞機製%數值模擬%跼部破壞%混凝土開裂%混凝土爆裂%結構抗火
루판파배궤제%수치모의%국부파배%혼응토개렬%혼응토폭렬%결구항화
Slab failure mechanism%Numerical modelling%Integrity failure%Concrete cracking%Spalling of concrete%Structural fire engineering
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.
鋼觔混凝土樓闆由于材料退化和熱膨脹的作用,在火災條中的破壞機製與常溫下有很大的區彆,體現在應力分佈、變形程度、跼部破壞、極限承載力等方麵.從數值分析的角度分析瞭鋼觔混凝土樓闆在火災中的破壞機製,對爆裂防護位置提齣瞭建議,併指齣瞭過火結構健康檢測時應註意的問題.
강근혼응토루판유우재료퇴화화열팽창적작용,재화재조중적파배궤제여상온하유흔대적구별,체현재응력분포、변형정도、국부파배、겁한승재력등방면.종수치분석적각도분석료강근혼응토루판재화재중적파배궤제,대폭렬방호위치제출료건의,병지출료과화결구건강검측시응주의적문제.
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.