火灾下梁柱端板连接节点的力学性能研究

摘要

通过火灾作用下门式刚架半刚性端板连接节点ANSYS计算模型的分析，得出了节点的转角温度关系及转角达到极限状态时的临界温度，为分析节点在火灾下的转动性能和节点的抗火能力提供一种经济、可行的方法，并发现在进行ANSYS模型抗火计算时，采用EC3高温下钢材特性较为合理。对基于计算的钢结构节点抗火设计方法研究具有理论意义和工程实用价值。%In this paper, the ANSYS computational model for node of beam and column end-plate with door frame semi-rigid end- plate connections is analyzed, whereby a relationship between the rotation angle and temperature is obtained. Also the critical temperature for extreme rotation angle is achieved. The results provide an economic and feasible method for the analysis of node performance. It is found that during the ANSYS model calculations, use of EC3 high temperature properties of steel is more reasonable.