中文摘要：

在总结现有关键构件判别方法的基础上,归纳了大跨空间管桁架结构关键构件判别方法应满足的要求,从而提出了基于结构应变能的关键构件判别方法。运用ANSYS有限元程序和MATLAB软件实现了基于结构应变能的关键构件判别。通过数值模拟分析,验证了基于结构应变能的关键构件判别方法不仅适用于设固定铰支座的大跨空间管桁架结构,还适用于设弹性支座的大跨空间管桁架结构。

英文摘要：

On the basis of the existing methods for key component identification, the requirements of key component identification methods for large-span spatial pipe truss structure were summarized, and the method for identifying key components based on structural strain energy was put forward. The key component identification was realized by finite element software ANSYS and MATLAB language based on structural strain energy. Numerical analysis results demonstrate that the method is applicable not only to the fixed hinge support, but also to the elastic support in the large-span spatial pipe truss structure.