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高层建筑设备多、人员密度大,建筑火灾将造成巨大的生命和财产损失。钢筋混凝土结构在高层建筑中应用广泛,研究其抗火性能、抗火设计理论具有重要的现实意义。本文利用ABAQUS有限元分析软件,结合试验数据,对高温下约束混凝土梁的温度场进行了计算和分析,计算结果与试验结果吻合较好。温度场是钢筋混凝土梁的高温力学性能和耐火极限分析和设计的基础,本文温度场的分析方法可为钢筋混凝土梁受火损伤后加固设计提供依据。
High-rise buildings and equipment, personnel density, building fire will cause tremendous loss of life and property. Reinforced concrete structures are widely used in high-rise buildings. Studying their fire resistance, fire resistance design theory has important practical significance. In this paper, using ABAQUS finite element analysis software, combined with the experimental data, the temperature field of the confined concrete beam under high temperature is calculated and analyzed. The calculated results are in good agreement with the experimental results. Temperature field is the basis of high temperature mechanical properties and fire resistance limit analysis and design of reinforced concrete beams. The analysis method of temperature field in this paper can provide basis for strengthening design of reinforced concrete beams after being damaged by fire.