深圳大运中心体育馆铸钢节点构造选型和模型试验研究

Research on structure selection and model test of cast-steel joint used in the Gymnasium of Shenzhen Universiade Sport Center

结合深圳大运中心体育馆大跨度钢结构关键连接节点,对铸钢节点的构造选型进行了设计。根据原型节点的受力特点,设计制作了1∶2的节点模型及其加载装置,并且进行了静力加载试验,对节点各分支杆件的应力状况和变形进行了测试。试验结果表明:在1.3倍设计荷载作用下,节点大部分区域处于弹性受力状态,节点杆件的转角和位移很小,说明该节点在承载力和刚度方面能够满足安全性和适用性要求;位于节点中轴面上的杆件连接耳板和销轴受压偏斜变形,为此提出了改进构造的措施——将杆件耳板直接顶压在节点区域,销轴不是用作抗剪构件而仅作为限位构件。将试验结果与有限元分析结果进行对比,结果符合较好。结合本研究针对铸钢节点的研究、设计制造、材质检验提出了建议。

For designing the key joints of large-span steel structure in the Gymnasium of Shenzhen Universiade Sport Center,a study on the structure selection of cast-steel joint was carried out.According to the load characteristics of the prototype joint,a 1∶2 model and its loading device were made.By carrying out static loading test on the model,the stress condition and deformation of the joint was experimentally examined.Results of the experiment and analysis show that even if the test load reaches 1.3 times the design load,most parts of the joint remain elastic with little deformation,indicating the satisfaction of the joint design for requirement of safety and applicability.The connection plate and pin in the joint axis surface were deformed by the pressure,thus enhancement measures were taken press the plate on the joint directly,then the pin is used as a space limitling element not a shear resistant.It is further shown that testing and FEM analysis results are compared favorably.Proposal about the study,design and manufacture,materials inspection of the cast-steel joints was put forward combining with this research.