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以成都双流国际机场T2航站楼建设项目为背景,设计出一套空间自平衡加载装置,对工程中采用的2个复杂相贯节点进行足尺静力加载试验。在设计荷载作用下,节点处于弹性状态;在极限荷载作用下,主管发生明显变形,但节点极限承载力远高于设计荷载,失效模式表现为延性性质。同时,采用ABAQUS有限元分析软件对节点进行弹塑性非线性分析,将试验结果与计算结果进行对比分析,验证有限元模型的正确性;进一步探讨几种主管加劲肋形式对节点极限承载力的影响。研究表明,中心设置一块加劲肋最为有效,既能提高节点极限承载力,又具有较好的经济性和施工便捷性。
Taking Chengdu Shuangliu International Airport T2 terminal construction project as a background, a set of space self-balance loading device is designed to carry out full-scale static loading test on two complex intersecting nodes in the project. Under the action of design load, the joint is in elastic state. Under the action of ultimate load, the deformation of the supervisor occurs obviously, but the ultimate bearing capacity of the joint is much higher than that of design load, and the failure mode is ductile. At the same time, the ABAQUS finite element analysis software is used to elasto-plastic nonlinear analysis of the joints, and the test results are compared with the calculated results to verify the correctness of the finite element model. Furthermore, the influence of several main stiffener forms on the ultimate bearing capacity . The research shows that it is most effective to set a stiffener in the center, which can not only improve the ultimate bearing capacity but also have better economy and construction convenience.