钢管混凝土柱-钢梁节点在具有冷却过程的模拟火灾中的性能分析

对3个带有钢筋混凝土楼板的钢管混凝土柱与钢梁的节点进行了试验,这些节点承受组合荷载、同时具有加热和冷却的火荷载的共同作用。试验参数包括加热时间和防火材料厚度。测量了节点在加热、冷却和灾后的温度和变形。采用有限元模型模拟了节点在组合荷载和火灾下的反应。通过试验结果证实了有限元模型的有效性。随后采用有限元模型分析加热和冷却过程各自引起的节点温度变化。另外,给出此类节点在组合荷载和加热冷却火荷载作用下的弯矩-转角关系。

Performance of CFST Column to Steel Beam Joints Subjected to Simulated Fire Including the Cooling Phase

This paper presents the experimental results of three concrete filled steel tube (CFST) column to steel beam joints with reinforced concrete (RC) slAbs under combined loading and fire including the heating and cooling phases.The test parameters include heating time and thickness of the fire protection material.Temperatures and deformations of the joint specimens during the heating,cooling and post-fire phases were measured.A finite element analysis (FEA) model to simulate the action of a CFST column to stee...