标准火灾作用下的钢管混凝土叠合短柱温度分布  

Temperature distribution of concrete filled steel tube reinforced concrete short columns subject to a standard fire

作　　者：王国辉[1] 项凯[1] 韩伟平[1] 赵璧[1] 

机构地区：[1]公安部天津消防研究所,天津300381

出　　处：《消防科学与技术》2013年第10期1059-1063,共5页Fire Science and Technology

基　　金：国家"十二五"科技支撑计划项目(2011BAK03B0104)

摘　　要：研究火灾中钢管混凝土叠合短柱温度-时间关系及其影响因素。完成了4根圆形截面钢管混凝土叠合短柱的火灾试验,分析火灾中圆形截面钢管混凝土叠合短柱温度-时间关系变化,考虑因素包括构件截面周长、长细比和截面含管率,并采用有限元程序模拟试验结果。研究结果表明:在相同受火时间作用下,截面含管率和试件高度相同时,试件截面周长越大,试件内温度越低;试件截面周长和截面含管率相同时,长细比越大,试件内温度越低;试件截面周长和长细比相同时,截面含管率的变化对试件内温度场影响较小。有限元法可以较好地模拟方形截面钢管混凝土叠合短柱的温度场分布。The relationship and influential factors of temperature --time was analyzed about concrete filled steel tube reinforced concrete （CFSTRC） short columns. Test results of four CF- STRC short columns with circular cross section were reported in this paper. The influential factors included perimeter of cross section, slenderness ratio and steel tube area ratio. The change was studied on temperature--time relationship of CFSTRC cir- cular short columns. Finite element models were established. The test results show that： the larger perimeter of cross sec- tion, the lower temperature inside the specimens with the same fire exposure time and steel tube area ratio and height of speci- mens; the larger slenderness ratio, the lower temperature inside the specimens with the same fire exposure time and perimeter ofcross section and steel tube area ratio; steel tube area ratio has slight influence on temperature distribution inside the specimens with the same fire exposure time and perimeter of cross section and slenderness ratio; the finite element method is capable of predicting temperature distribution of CFSTRC circular short columns with an accuracy that is sufficient for design purposes.

关 键 词：火灾 钢管混凝土叠合短柱 圆形截面 

分 类 号：X913.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]