高温环境中主管轴力对焊接圆钢管T节点承载性能的影响  

Effect of axial force in the chord on the performance of circular tubular T-joints at elevated temperature

作　　者：赵海成[1] 邵永波[2] 杨冬平[3] ZHAO Haicheng SHAO Yongbo YANG Dongping(School of Civil Engineering, Yantai University, Yantai 264005, China School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China Technology Inspection Center, China Petroleum ＆ Chemical Corporation, Dongying 257062, China)

机构地区：[1]烟台大学土木工程学院,山东烟台264005 [2]西南石油大学机电工程学院,四川成都610500 [3]胜利油田技术检测中心,山东东营257062

出　　处：《海洋工程》2016年第6期111-117,共7页The Ocean Engineering

摘　　要：利用有限元软件ABAQUS建立T型圆钢管节点热传导分析模型,通过与已有试验数据进行对比,验证了所建有限元模型的可靠性。利用提出的有限元模型分析了不同主管轴力作用下的T型圆钢管节点在火灾环境中的失效过程,研究了主管轴力对T型圆钢管节点临界温度的影响规律。分别讨论了采用屈服强度折减和弹性模量折减的方法预测T型圆钢管节点在高温下的极限承载力,并将预测结果和有限元分析结果进行了对比,给出了这两种方法用于工程设计时的建议。A finite element model（ FEM） of the heat transfer analysis for circular hollow section（ CHS） tubular T-joints is built by using software ABAQUS. Through comparison with experimental data,the reliability of the FEM is verified. By using the presented FEM,the failure process of CHS T-joints with different axial forces in the chord in fire condition is analyzed,and the effect of the axial force in the chord of tubular T-joints on the critical temperature is studied. The prediction of the ultimate strength of CHS tubular T-joints at elevated temperature by reduction of the yield strength and reduction of the elastic modulus respectively is discussed,and the predicted results are compared with FE results. Finally,suggestion for design purpose is given.

关 键 词：T型圆钢管节点 主管荷载比 临界温度 极限承载力 有限元分析 

分 类 号：P751[交通运输工程—港口、海岸及近海工程] TE973[天文地球—海洋科学]