L形钢管混凝土芯柱温度场分析

Thermal analysis of L-steel tube concrete core column

研究高温下钢管混凝土芯柱的承载力及变形变化规律。分析钢管混凝土芯柱的温度场,合理地确定火灾情况下钢管混凝土芯柱受火模型,利用ABAQUS有限元软件进行分析。给出试件不同时刻的温度场分布云图和各测点的温度变化曲线。构件从受火面到背火面,温度逐渐降低,而且相差较大。有限元分析充分反映了混凝土材料随着温度上升出现的滞后现象,与理论分析相一致,为进一步认识钢管混凝土芯柱的高温力学性能和耐火极限分析提供依据。

Study the beating capacity and deformation law of steel tube concrete core column at high temperatures.Using the ABAQUS finite el- ement soft-ware to analyze the specimens,the researchers have analyzed the temperature field of steel tube concrete core column on the basis of reasonable determination for fire model of steel tube concrete core column.Distribution of temperature field at different times and the temperature variation curve of various points are obtained.From the heated side to the reverse side of the specimen,the temperature lowers gradually ,and the temperature difference is big.The lagging behind phenomena of temperature variation of interior concrete which appears when temperature rises that reflected in the finite element, are corresponding with theoretical analysis.This has provided an important basis for further study of high-tem- perature mechanical property and refractory limit analysis of the steel tube concrete core column.