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（1 上海交通大學土木工程系， 上海 200240； 2 山東交通學院， 濟南 250000）

［摘要］利用ABAQUS軟件建立了火災下導管架海洋平臺圓管柱與H型鋼梁外加強環(huán)節(jié)點的有限元計算模型，分析了節(jié)點在高溫下的抗火性能。根據(jù)海洋平臺火災的特點，借助火災模擬軟件（FDS）計算艙室溫度場的分布，分析了不同溫度場下梁柱加強環(huán)節(jié)點的高溫承載力及臨界溫度，討論了影響節(jié)點承載力的主要參數(shù)。經分析可得，增加外加勁板厚度可顯著提高該節(jié)點抗火臨界溫度和破壞時的極限承載力，為梁柱節(jié)點的抗火設計提出了建議。

［關鍵詞］海洋平臺；梁柱節(jié)點；臨界溫度；極限承載力

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