新型体育场挑篷结构的性能及工程应用研究

Study on new type cantilever roof structure and its engineering application

根据体育场挑篷结构的特点和要求,将张弦梁原理运用到悬臂结构,进而构造出一种新型体育场挑篷结构.该挑篷结构利用悬臂型张弦梁并设置后拉索,避免了柱子承受巨大的弯矩;通过设置内环梁,取消内排柱和抗风拉索,达到了无观瞻影响的目的.结合实例,通过对结构传力途径、非线性稳定性分析表明,该挑篷结构的构件以承受轴力为主,并具有良好的稳定性,因而可充分发挥材料的强度.此外还给出了几个典型节点的详图.理论分析和工程实践证明,该种挑篷结构受力合理、构造简单,是一种优良的结构形式.

The new type cantilever roof structure presented here was based on the concept of Beam String Structure, and used fixed back-stay cables to prevent the columns from bearing enormous moment. In order to get wider eyeshot, the structure was installed with internal ring trusses instead of internal columns and front guy cables. This roof structure was used in a practice engineering, Analysis of the load transfer and nonlinear stability showed that the members in this type structure were mainly axial force components; and that structure had excellent stability performance, some typical details of which were given. Theoretical analysis and engineering practice proved that this cantilever roof structure has good structure form because of its reasonable load transfer and simple connections .