援所罗门群岛2023年太平洋运动会体育场铸钢节点受力性能试验研究

Experiment on the Mechanical Behavior of Cast Steel Joint Used in the Main Stadium for 2023 Pacific Games in Solomon Islands

援所罗门群岛2023年太平洋运动会体育场钢结构罩棚采用了树形支撑铸钢节点,为考察其在最不利设计工况下的受力性能,对铸钢节点进行了足尺试验研究和有限元分析。试验结果表明,在1.0倍受拉工况设计荷载及1.6倍受压工况设计荷载作用下,节点处于弹性阶段,卸载后没有明显残余变形。有限元分析结果与试验结果吻合良好,表明有限元分析可以准确模拟节点试件的实际受力状态。铸钢节点的极限承载力在受拉工况下为设计荷载的9.0倍,受压工况下为设计荷载的8.6倍,满足《铸钢节点应用技术规程》(CECS 235:2008)中的相关要求,该铸钢节点具有较高的安全储备。

Cast steel joints were introduced into the dendriform roof structure for the main stadium for 2023 Pacific Games in Solomon Islands.Full-scale test and nonlinear finite element analysis were carried out to investigate the mechanical behavior of the cast steel joints under unfavorable design load condition.The results indicate that the steel joint exhibits elastic behavior up to 100%design load under tensile condition and 160%design load under compression condition,and no residual deformation after unloading is observed.The finite element analysis results match well with the test data,indicating that the finite element analysis can accurately simulate the actual stress state of the joint specimen.The ultimate bearing capacity of the cast steel node is 9.0 times the design load under tension conditions and 8.6 times the design load under compression conditions,meeting the relevant requirements specified in the Technical Specification for Application of Connections of Structural Steel Casting(CECS 235:2008).The designed cast steel joint has a relatively high strength reserve.