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利用有限元软件ABAQUS建立T型圆钢管节点模型,采用间接热力耦合的方法,研究了节点在ISO834标准升温环境和不同荷载条件下的抗火性能。根据试验建立验证模型,将分析得到的结果与试验结果进行对比。通过比较,验证了模型的可靠性。在此基础上,建立管节点抗火模型,通过分析主管变形和主管端部轴向反力随温度变化曲线,以及管节点的失效机理,得到不同荷载比和节点的几何参数对节点抗火性能的影响。
The finite element software ABAQUS was used to establish the T-shaped circular steel pipe joint model. The indirect thermal coupling method was used to study the fire resistance performance of the joint under ISO834 standard temperature environment and different load conditions. According to the test to establish a verification model, the analysis of the results obtained with the test results were compared. By comparison, the reliability of the model is verified. Based on this, the fire resistance model of pipe joints is established. By analyzing the deformation of pipelines and the axial reaction force of pipe ends with the temperature curves and the failure mechanism of pipe joints, the influence of different load ratio and geometric parameters of joints on fire resistance of joints Impact.