高温下钢筋混凝土热-结构耦合模拟

Thermal Coupling Simulation of Reinforced Concrete at High Temperature

随着钢筋混凝土结构的广泛应用,火灾导致结构破坏的事故频有发生,因此对混凝土抗火性能的研究愈加重要。本研究在足尺门框结构火灾模型试验的基础上,对于以前所采用的单个梁和单个柱的模拟方法提出了改进,运用大型有限元分析软件ANSYS参照试验进行了足尺门框构件的热-结构耦合模拟分析,并将得出的计算结果与试验值进行对比验证,计算值与试验值吻合良好,说明本研究所采用的方法是可行的,为钢筋混凝土结构抗火性能的研究及设计提供了有效参考。

With the wide application of the reinforced concrete structure, accidents of structural damage caused by fire occur frequently, and the research of fire resistance of reinforced concrete is increasingly important. Based on the full scale doorframe structure model of fire experiment, the study puts out the improvement to the simulation method of single beam and single column, using large-scale finite element analysis software ANSYS to analyze the thermal coupling simulation of the full scale doorframe structure. The calculated results and experimental values are compared. The calculated values are in good agreement with the experimental values, explaining the methods of this paper are feasible, which provides a useful reference for research and design of fire resistance of reinforced concrete structure.