(1 西南交通大学土木学院，成都 610031； 2 中铁一院设计集团城建分院，西安 710043)
［摘要］基于呼和浩特火车东站站房大跨度钢结构，针对顶部屋盖80m跨度穹顶和下部屋盖钢结构托换桁架的连接节点，依托ADINA分析平台，采用引入微动力阻尼系数的非线性Newton-Raphson方法进行了节点数值仿真分析，分别研究了节点的弹塑性受力性能和变形特征，与1∶2节点模型试验结果进行了比较，结果表明节点设计安全合理。
［关键词］大跨度钢结构；托换桁架；非线性有限元；仿真分析；试验
Test study and numerical analysis on the connecting joint between the dome and underpinned truss in Hohhot East Railway Station
Yu Zhixiang1, Zhao Shichun1, Zhang Guihai2, Li Li1(1 School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China；2 Urban Construction Branch，China Railway First Survey and Design Institute, Xi’an 710043, China)
Abstract:The underpinned truss is used in the long span steel structure roof of Hohhot East Railway Station. A numerical simulation analysis of the joint was conducted so as to ensure the safety of the connecting joint between the dome and the steel structure at lower part of the roof. The nonlinear Newton-Raphson algorithm was used by introducing the Low-speed Dynamics Damping Factor based on the soft of ADINA in the analysis. The elastic-plastic mechanics properties of the joint, as well as the deformation characteristics were studied by comparing with a 1∶2 scale joint test. The comparison indicates that the design of the joint is safe and reasonable.
Keywords:long span steel structure； underpinned truss； nonlinear finite element； simulation analysis； test
作者简介：余志祥，博士，Email:yzxzrq@126.com。
参考文献
［1］陈以一，陈扬骥.钢管结构相贯节点的研究现状［J］.建筑结构，2002,32(7)：24-30.
［2］呼和浩特火车东站钢结构穹顶托换桁架连接节点试验报告［R］.成都：西南交通大学土木学院，2007.
［3］BATHE K J. Finite element procedures in engineering analysis［M］. New Jersey：PrenticeHall Inc，1982.
［4］BATHE K J. On the development of finite element methods and software［C］//Proceedings, Conference on Numerical Methods in Continuum Mechanics, Zilina, Slovakia, 2003.
［5］王元清, 曾文平, 贺东哲. 圆管与工字钢混合空间管节点非线性承载分析［J］.清华大学学报：自然科学版，2002,42(S1)：101-104.
［6］刘建平，郭彦林.广州新体育馆大型钢板节点极限承载力分析［J］.青海大学学报：自然科学版，2001,19(2)：11-13.