（1 上海交通大学土木工程系， 上海 200240； 2 山东交通学院， 济南 250000）

［摘要］利用ABAQUS软件建立了火灾下导管架海洋平台圆管柱与H型钢梁外加强环节点的有限元计算模型，分析了节点在高温下的抗火性能。根据海洋平台火灾的特点，借助火灾模拟软件（FDS）计算舱室温度场的分布，分析了不同温度场下梁柱加强环节点的高温承载力及临界温度，讨论了影响节点承载力的主要参数。经分析可得，增加外加劲板厚度可显著提高该节点抗火临界温度和破坏时的极限承载力，为梁柱节点的抗火设计提出了建议。

［关键词］海洋平台；梁柱节点；临界温度；极限承载力

Study on fire resistance of beam-column joints in offshore platform

Jin Meng¹, Zhao Jincheng¹, Chang Jing², Liu Minglu¹(1 Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 2 Shandong Jiaotong University, Jinan 250000, China)

Abstract:ABAQUS program was used to establish the finite element calculation model of beam-column joints in offshore platform, and the fire resistance of the joint under different temperature was analyzed. Fire Dynamics Simulator (FDS) was adopted to establish the distribution of environment temperature according to characteristics of