崔志强, 余红霞. A Comparison of Behavior of Concrete Filled Steel Tubular Columns in Standard Fire and Natural Fire[J]. 2012, 32(2): 210-215+234. DOI: 10.13409/j.cnki.jdpme.2012.02.016.
真实火采用欧洲规范Eurocode 1 Part 1-2中的参数火模型来近似模拟真实火灾的温度—时间关系。研究发现
钢管混凝土柱在两种火场环境中的行为差异很大
真实火中的冷却过程对钢管混凝土的破坏起重要的影响。基于本研究
还初步得到火灾过程中环境温度的升温速度、柱火灾荷载比等对钢管混凝土组合柱的抗火性能的影响。
Abstract
Concrete filled steel tubular(CFST) column
which has been widely used in real projects
was chosen as the research objects in this paper.A large-scale finite element analysis model of CFST using ABAQUS program was established to analyze the temperature distributions
stress
deformations
failure modes
fire resistance limit of CFST column in the ISO-834 standard fire and natural fire.Parametric temperature-time curves in Eurocode 1 Part 1-2 were used to approximate the temperature versus time relations in natural fire.The research shows that CFST columns behaves differently in natural fire from the standard fire.Based on the current analysis
the effects of the fire heating rate
load ratio
etc.on the fire resistance of CFST columns are also summarized.