安康体育馆拱支索拉结构设计

Design of arch supported cable-stayed structure of Ankang Gymnasium

安康体育馆主体结构采用钢筋混凝土框架结构,屋盖为椭圆形,短轴方向跨度为94.795m,采用主次交叉平面及立体桁架形成的空间网格体系。屋盖通过14组斜拉索与跨越体育馆长轴方向、跨度为227m的一对相互倾斜的钢拱相连,为屋盖在短跨额外提供了14个弹性支座,有效的减小了屋盖的跨厚比。大拱落地处的水平推力较大,为保证大跨度拱在受力过程中支座的可靠性,拱脚处设置了4个巨型承台,承台下采用桩基础抵抗竖向及水平反力。仔细论述了此项目的设计分析过程,供类似项目参考。

The main structure of Ankang gymnasium adopts reinforced concrete frame structure,with the maximum span of 94.795m.The space grid system is formed by primary and secondary cross plane and three-dimensional truss.Through 14 groups of stay cables,the roof is connected with a pair of mutually inclined steel arches with a span of 227m across the long axis of the gymnasium.28 elastic supports are provided for the roof at the third point of the short span,which effectively reduces the span thickness ratio of the roof.In order to ensure the reliability of the support of the long-span arch in the stress process,four giant caps are set at the arch foot,and the pile foundation is used under the cap to resist the vertical and horizontal reaction.This paper discusses the design analysis process of this project in detail for reference of similar projects.