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在有限元分析软件中使用详细的有限元模型,对提升钢梁/柱端板连接部件的耐火性能进行一系列的数值参数研究。对实际使用节点构造的梁柱组件进行研究,重点在于调查如何改进连接件设计,从而使整个结构能在高温下安全。高温下,结构中的梁要经历悬链作用,此作用会造成连接件的破裂并在柱施加附加力。研究了不同的节点构造(螺栓直径、螺栓强度级别、端板厚度、使用防火螺栓和端板使用耐火钢)对其结构性能及高温下耐火性能的影响。结果表明,可通过提高连接件的变形能力特别是使用防火螺栓来改善在高温下的耐火性能。
In the finite element analysis software, a detailed finite element model is used to study a series of numerical parameters for improving the fire resistance of the connecting parts of steel beam / column. Research on beam-column assemblies that actually use the node construction focuses on investigating how to improve the connector design so that the entire structure is safe at high temperatures. At high temperatures, the beam in the structure undergoes catenary action, which can cause the connector to rupture and apply additional force on the column. The effects of different node configurations (bolt diameter, bolt strength level, end plate thickness, use of fire bolts and end plates with refractory steel) on their structural properties and fire resistance at elevated temperatures were studied. The results show that it is possible to improve the fire resistance at high temperatures by increasing the deformability of the connection, in particular using fire bolts.