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.
出处
《北京工业大学学报》
CAS
CSCD
北大核心
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)
关键词
抗火设计
钢管混凝土柱
有效长度系数
稳定系数
fire resistance design
concrete filled steel tube column
effective length coefficient
stability coefficient
