摘要
为研究圆管桁架构件不同连接工艺条件下的承载力性能,针对6种常用的连接模式,采用计算力学方法进行了力学性能分析,研究其工艺力学特性。考虑焊缝刚度影响、焊材脆性影响,构建了网格化数值模型。数值计算中通过在非线性Newton-Raphson算法中引入Low-Speed Dynamics Damping技术,考察节点的极限承载力与撕裂失效特征;综合力学、工艺、经济性等因素综合评价。分析表明,隔板对接方式具有较好的承载能力和变形性能,值得在工程应用中推广,为实际工程改进、优化连接设计的构造措施提供参考。
Six kinds of butting methods of circular tubular truss members are considered by means of computational mechanical methods in order to study the mechanical behavior and the processing technique.The influences of stiffness of the welds and material brittle are taken into account in building the grid models.The nonlinear Newton-Raphson method is employed by introducing the Low-Speed Dynamics Damping Factor(LSDF) in numerical calculation,where the bearing capacity of joints and material rupture failure are investigated.The best butting method is proposed by comparing processing techniques,economy,etc.The reliability of force transmission,as well as processing technical and the convenience of construction is a serious concern in the study.The results indicate that the butting method by means of diaphragm with better bearing capacity and ductility,which is worth popularizing in practice.Thus,a reference can be provided for improving the practical engineering and optimizing the construction measures of joints design in practice.
出处
《工业建筑》
CSCD
北大核心
2010年第S1期437-440,465,共5页
Industrial Construction
基金
西南交通大学科研基金资助项目(2008A02)
西南交通大学博士生创新基金资助项目(2009)
关键词
管桁架
圆管对接
承载力性能
数值仿真
焊缝
tubular truss
butting of circular tube
bearing capacity
numerical simulation
weld
