网壳结构鼓型节点弹塑性分析及模型试验

Elastic-plastic analysis and experimental study on drum cast-steel joint of reticulated shells

铸钢节点是大跨空间结构广泛采用的一种节点型式,通过对重庆奥林匹克体育中心体育场网壳结构鼓型铸钢节点有限元弹塑性分析,得到铸钢节点应力、应变分布情况。通过鼓型铸钢节点结构的实体试验,得到各测点应力测试值。结合理论分析和实体试验,指出铸钢节点应力分布规律及特点,对鼓型铸钢节点的承载安全性做出评价,为鼓型铸钢节点设计提出几点建议。

Cast-steel joint is a widely used type for long-span space structure. By forming finite element model and performing elastic- plastic analysis to special cast-steel joint of Chongqing Olympic stadium steel reticulated shells, the stress and strain distributing condition of cast-steel joint are get. And by full-scale experiment,the stress on test points of the cast-steel joint is obtained. Combining theoretical analysis with the experiment, stress distributing rule is gained and the carrying capacity of the joint is evaluated. Furthermore, some advice to design of large special cast-steel joint is given.