北京奥运会老山自行车馆屋盖节点数值分析
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摘要
北京奥运会老山自行车馆的屋顶采用了双层球面网壳结构,柱脚及柱顶分别采用了铸钢球铰支座和圆钢管相贯节点。本文介绍了铸钢球铰支座的构造形式,采用四面体单元、接触单元对及子模型分别模拟了铸钢球铰支座的实体模型、接触模型及螺纹连接问题,分析了不同荷载工况下的应力分布特点;介绍了圆钢管相贯节点的构造,分别采用四边形板壳元及四面体单元模拟了圆钢管相贯节点的实体模型,比较了节点有无加劲肋及垫板时节点刚度的变化情况。通过分析可以看出,铸钢球铰支座构造简单,具有一定的转动能力,能够传递拉力和压力,适用于铰接柱脚节点;垫板和加劲肋的存在提高了圆钢管相贯节点的承载力,改变了节点的破坏形式,增大了节点刚度。
The double-layer reticulated dome is used in the roof structure of the Laoshan Cycling Gymnasium.Cast ball-and-socket joint is used as the column support,while circular hollow section welded joint is used at the top of the tube. The configuration of the cast ball-and-socket joint is introduced and the tetrahedral element is used to analyse the solid model of the cast ball-and-socket joint.Connection element pair is used to simulate the connection between different members of the joint,while sub-model is used to simulate the threaded connection.The stress distributions of the joint under different loading cases are compared.Shell element and solid element are used to simulate the circular hollow section welded joint.The stiffness of the models with or without stiffeners and reinforcements are compared.Based on the analysis,it is indicated that the cast ball-and-socket joint has a simple configuration and the ability of rotation, which can trantransfer slate tension or compression and can be used as hinged column support.With the stiffener and reinforcement,the load carrying capacity and the rigidity of welded circular hollow section joint are increased,and the failure modes of the joint under different cases are changed.
The double-layer reticulated dome is used in the roof structure of the Laoshan Cycling Gymnasium.Cast ball-and-socket joint is used as the column support,while circular hollow section welded joint is used at the top of the tube. The configuration of the cast ball-and-socket joint is introduced and the tetrahedral element is used to analyse the solid model of the cast ball-and-socket joint.Connection element pair is used to simulate the connection between different members of the joint,while sub-model is used to simulate the threaded connection.The stress distributions of the joint under different loading cases are compared.Shell element and solid element are used to simulate the circular hollow section welded joint.The stiffness of the models with or without stiffeners and reinforcements are compared.Based on the analysis,it is indicated that the cast ball-and-socket joint has a simple configuration and the ability of rotation, which can trantransfer slate tension or compression and can be used as hinged column support.With the stiffener and reinforcement,the load carrying capacity and the rigidity of welded circular hollow section joint are increased,and the failure modes of the joint under different cases are changed.
引文
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[2]刘锡良,韩庆华.网格结构设计与施工[M].天津:天津大学出版社,2004.
[3]卓新.巨型双层网壳小拼单元悬挑法施工内力分析[J].施工技术,2000,29(12):37-39.
[4]王策,沈世钊.单层球面网壳结构动力稳定分析[J].土木工程学报,2000,33(6):17-24.
[5]张明,徐崇宝.单层球面网壳型式及其静动力性能分析[J].哈尔滨建筑大学学报,1998,31(5):34-39.
[6]韩庆华,杨志,潘延东等.单双层球面网壳结构的静力特性及其稳定性能分析[J].天津大学学报,2002,35(4):447-451.
[7]韩庆华,刘锡良,陈志华.周边双层中部单层球面网壳结构的特征值屈曲分析及其极限承载力[J].建筑结构学报,2002,23(3):69-74.
[8]李俊,卫星,李小珍等.大型钢网壳结构铸钢节点复杂受力的试验研究[J].土木工程学报,2005,38(6):8-12.
[9]卞若宁,陈荣毅,赵宪忠.空间结构大型铸钢节点试验研究[J].建筑结构,2002,32(12):45-47.
[10]邹连海,吴京,李龙.南京奥体中心体育场钢屋盖主拱铸钢节点试验方案研究[J].江苏建筑,2005,(1):14-16.
[11]林彦,刘锡良.铸钢节点在大跨度空间结构中的应用[J].工业建筑,2003,(增刊):632-640.
[12]刘建平,郭彦林,陈国栋等.圆管相贯节点极限承载力有限元分析[J].建筑结构,2002,32(7):56-59.
[13]舒兴平,朱邵宁,朱正荣等.K型圆钢管搭接节点极限承载力研究[J].建筑结构学报,2003,25(5):71-77.
[14]杨叔庸,孙文波,诸福华.广州国际会议展览中心张弦桁架结构节点设计[J].建筑结构,2004,34(11):28-29.
[15]李和华.钢结构连接节点设计手册[M].北京:中国建筑工业出版社,1992.
[16]韩庆华.单双层球面网壳结构的性能分析及焊接空心球节点的极限承载力[R].中国地震局工程力学研究所,2001.
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