大学生体育馆屋盖结构设计

Roof Structure Design of Beijing Collegiate Gymnasium

四坡折板型网架结构具有刚度好、内力较小、室内空间合理等优点,但其边界推力给下部结构带来不利影响。本文介绍大学生体育馆设计中利用建筑造型要求的塔筒及大挑檐组成的塔筒水平桁架推力约束体系。动力分析表明,这类屋盖结构的竖向振动反应较大,在设计中应予重视。

The pyramidal folded-plate type space trusses structure is used for the roof of Beijing Collegiate Gymnasium. It has the merits of stronger rigidity, less internal forces and more rational interior space. But its boundary thrusts bring about unfavourable influences to the lower support structure. This paper presents the roof structure design using the four corner tubes and four horizontal trusses in-between to conform with the architectural requirements with big cantilever eaves and to act as thrust resisting system around the roof to absorb thrusts from space trusses. Dynamic analysis shows that the response of this type of roof structure to vertical vibration is fairly great and much attention has to be paid in design.