摘要
为了研究高温后中空夹层钢管混凝土压弯柱力学性能,该文设计24根压弯构件,选取合适的本构参数,利用ABAQUS有限元软件进行分析,并与相应的试验参数作对比,有限元结果与相应的试验结果对比吻合良好。该文中设置轴压比、温度、空心率等参数并研究其对跨中P-Δ曲线的影响。该文对高温后中空夹层钢管混凝土压弯柱工作机理和破坏模态进行分析,结果表明:随着温度的升高、轴压比的变大,构件横向承载能力变小。随着温度的升高,轴压比的变小,构件的位移延性变好。不超过500℃时,构件抗弯承载能力随着空心率的变大而变小,超过500℃,构件抗弯承载能力随着空心率的变大而变大,但空心率对构件抗弯能力的影响不大。
In order to analysis the mechanical behavior of concrete-filled double-skin steel tubular（CFDST） columns after high temperature, this authors design 24 CFDST columns, with appropriate constitutive parameters, and use ABAQUS finite element software for analysis. These parameters are compared with corresponding experimental parameters and good agreement is found. The influence of parameters such as axial pressure ratio, temperature and hollow rate on P-Δ curve is studied. In this paper, the working mechanism and the destruction mode of concrete pressure bending column of are analyzed. The results showed that when the temperature increases, the axial pressure ratio increases, and the transverse load capacity of the component decreases. As the temperature increases, the axial pressure ratio decreases, and the displacement ductility of the component becomes better. When the temperature is no more than 500℃, the flexural bearing capacity becomes larger with hollow components turning smaller. When temperature is over 500℃, the bearing capacity of bending members becomes larger with hollow rate turning larger. The hollow rate has little effect on the bending ability of the component.
作者
刘晓
徐建烨
王兵
LIU Xiao;XU Jian-ye;WANG Bing(School of Architectural and Civil Engineering,Shenyang University,Shenyang 110044,China)
出处
《工程力学》
EI
CSCD
北大核心
2018年第A01期40-45,共6页
Engineering Mechanics
