端部约束钢管混凝土柱耐火性能及抗火设计方法  

Fire Performance and Fire Resistance Design Method for End Restrained Concrete Filled Steel Tube Columns

作　　者：邱仓虎[1] 王广勇[1] 王力[1] 

机构地区：[1]中国建筑科学研究院建筑防火研究所,北京100013

出　　处：《北京工业大学学报》2016年第7期1037-1044,共8页Journal of Beijing University of Technology

基　　金：国家科技支撑计划资助项目(2014BAL05B04);中国建筑科学研究院自筹基金资助项目(20140111330730062)

摘　　要：为了给钢管混凝土柱的抗火设计提供有效方法,利用梁单元建立了端部约束钢管混凝土柱耐火性能分析的有限元计算模型.利用上述模型,考虑转动约束、轴向约束以及偏心距的影响,对火灾下端部约束钢管混凝土柱的计算长度系数和稳定系数等进行了系统的参数研究.最后,提出了端部约束钢管混凝土柱的抗火计算方法.In order to establish the fire resistance design method for concrete filled steel tube （ CFST ） columns, a finite element （ FE ） model based on beam elements was proposed to simulate the fire performance of axially and rotationally restrained CFST columns. A systematically parametric study was conducted on the effects of the axial restraint, the rotational restraint, and the eccentric ratio of axial load of the column end. The effective length coefficient and the stability coefficient of the CFST columns was researched by using the FE model. In the end, a fire resistance design method for the restrained CFST columns was introduced.

关 键 词：抗火设计 钢管混凝土柱 有效长度系数 稳定系数 

分 类 号：TU398.2[建筑科学—结构工程]