钢筋混凝土框架抗火性能的有限元分析  

Nonlinear finite element analysis of fire resistance of reinforced concrete frame

作　　者：廖艳芬[1] 漆雅庆[1] 马晓茜[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《消防科学与技术》2011年第12期1100-1105,共6页Fire Science and Technology

基　　金：亚热带建筑科学国家重点实验室开放基金项目(2008KB34);能源高效清洁利用广东普通高校重点实验室(KLB10003)

摘　　要：基于简化的固体可燃物燃烧模型,利用FLUENT对单室房间进行了火灾模拟,得到了烟气温度场分布情况。在此基础上,分析对比了钢筋混凝土框架在三种不同高度的跨层发生火灾下的温度场分布及变形规律。结果表明:在相同火灾荷载的情况下,火灾发生在高度越低的跨,整个框架结构破坏坍塌的越快;底跨层受火时,柱的侧向位移最小,高跨层受火时,柱的侧向位移最大;混凝土板是最早遭到破坏的,但混凝土柱的破坏才会导致整个框架的失稳坍塌。Based on a simplified combustion model of solid fuel, through numerical simulation of a single room in fire by FLUENT, the smoke and temperature distribution were formulated. The evolutionary processes of the reinforced concrete frame temperature distribution and deformation regulations when three different height cross-layer were under fire were analyzed. The results indicated that： in the case of the same fire load, the lower fire occurred at height of the cross, the faster the eollapse of the framework structural damage; when the lowest cross-layer is under fire, the lateral displacement of the column was the smallest, and when the upmost cross-layer is under fire, the lateral displacement of the column was the largest; the destruction of the concrete slab is the earliest, but the destruction of concrete columns is the reason for the instability and collapse of the entire framework.

关 键 词：火灾 钢筋混凝土框架 数值模拟 耐火极限 

分 类 号：X913.4[环境科学与工程—安全科学] TU375.4[建筑科学—结构工程]