摘要
本文基于500°C等温线法研究了受火后钢筋混凝土(RC)柱轴压承载力.首先选取RC柱的热工参数,应用有限元分析软件ABAQUS进行热传导分析.根据热分析结果基于RC柱受火后轴压承载力计算方法得到柱受火后剩余承载力.考虑了受火时间、混凝土保护层厚度、配筋率、长细比等因素对受火后轴压柱承载力的影响.结果表明,该方法具有较高的有效性和精确度,可以应用于受火后RC柱轴压承载力计算.
The axial compressive capacity of post-fire reinforced concrete(RC)columns is studied based on the 500℃isotherm method.Firstly,the thermal parameters of RC columns are selected,and the finite element analysis software ABAQUS is used for heat conduction analysis.According to the results of thermal analysis,the residual strength of post-fire columns is obtained based on the calculation method.Considering the effect of fire duration,concrete cover thickness,reinforcement ratio,slenderness ratio and other factors on the bearing capacity of the axial compressive columns after fire.The results show that the method has high effectiveness and accuracy and can be applied to calculate the axial compressive capacity of post-fire RC columns.
作者
蔡斌
郝丽妍
许龙飞
CAI Bin;HAO Li-yan;XU Long-fei(School of civil engineering,Jilin Jianzhu university,Changchun130118,China)
出处
《吉林建筑大学学报》
2019年第4期11-16,共6页
Journal of Jilin Jianzhu University
关键词
轴心受压
受火
等温线法
有限元分析
axial compressive
post-fire
isotherm method
finite element analysis