某体育馆结构设计及关键技术分析

体育馆跨度大,造型独特,采用大钢拱及钢管桁架屋盖,下部混凝土框架结构,具有屋盖推力大、柱内轴力和弯矩大、基础设计难的特点,目的就是为解决上述难点.采用型钢混凝土柱提高承载力,抵抗较大的轴力和弯矩;设置钢筋混凝土斜撑和双排柱的框架体系,合理分担体育场挑蓬产生的弯矩,并支撑钢屋盖大拱;对屋盖下混凝土圈梁和与型钢混凝土柱相连的看台层圈梁和斜梁进行加强,以平衡屋盖推力,增强结构的整体性.屋盖大拱拱脚墩下基础采用考虑柱身水平承载力的联合柱承台加连梁的方案.设计结果表明,结构满足规范的各项要求,文中方法和结论,可为类似工程设计提供参考.

Several key issues of structural design of a gymnasium

The gymnasium mentioned in this paper had large span and unique shape, which was built with big steel arch, tabular truss roof and concrete frame structure. The purpose of this article is to solve these design difficulties such as big roof thrust, big axial force and bending moment of the columns, and foundation design. Steel reinforced concrete columns were adopted to raise bearing capacity, resist big axial force and bending moment. Concrete braces and frame of double row columns were set up share the moment of stadium roof and support the big arch. Ring beams and ramp beams under the roof, stand, which connected with the steel reinforced concrete columns ,were strengthened to balance the roof thrust and enhance the integrity of structure. Combined pile caps and coupling beams, which considered the horizontal bearing capactity of piles, were adopted for the big arch impost foundation of the roof. The de sign results showed that the structure met all requirements of codes. These methods could be referred for similar engineering design.