北京奥运会自行车馆双层球面网壳结构的设计与施工方法

Design and Construction Method of the Double-layer Reticulated Dome of Laoshan Cycling Gymnasium for Beijing Olympic Games

北京奥运会老山自行车馆屋盖采用带环梁的双层球面网壳结构,网壳支承于倾斜的人字型钢柱之上,覆盖直径达149.536m,建成后将成为我国跨度最大的双层球面网壳结构之一。该结构跨度大,矢跨比小,网格杆件较多,设计、施工存在着较大的难度。因此采取何种结构体系,如何进行合理的计算模型分析与施工都需要进行深入的分析与有效的论证。本文对该结构的设计与施工进行了较为全面的介绍与分析。

A double-layer reticulated dome with ring beam is desighed for the roof of Laoshan Cycling Gymnasium for Beijing Olympic Game. The dome is supported by inclined V-shaped steel columns. It will make the dome to be one of the largest double-layer reticulated dome in China, the overlapping diameter of which is 149. 536 meters. Because of its large span, small ratio of rise to span and large number of lattice pipe,it is challenging in the design and construction of structure. So the structural system, the structural analytical model and the construction scheme should be analyzed carefully and demonstrated effectively. The complete introduction to the design and construction of the reticulated dome is precented in this paper.