( 同济大学建筑设计研究院，上海200092)

［提要］泉州市体育馆的椭球型屋盖采用张弦桁架支撑壳体。重点介绍了该结构在分析和设计中的关键问题：利用NURBS造型技术生成泉州体育馆非规则屋盖曲面、结构体系布置；结合工程实例提出了张弦桁架结构拉索初始预应力取值的若干原则以及合理处理支座水平推力的方法；利用弹塑性方法分析其稳定性和极限承载力以说明张弦结构优异的力学性态。

［关键词］张弦桁架；支撑壳体；形态设计；初始预应力度分析；极限承载力

Key Technical Problems on Structural Design of Braced Hybridstring Shell in Quanzhou Gym/

Zhang Zheng,   Ding Jiemin(Architecture Design & Research Institute of Tongji University, Shanghai 200092, China)

Abstract:As a kind of new hybrid structures, hybridstring structure is applied widely in many largespan structures these years because of its good performance. The roof structure of Quanzhou Gym is a typical kind of hybridstring structure. It introduces several technical problems of structural analysis and design, including form design by NURBS method, structural system design, how to determinate initial prestress, how to  deal with the lateral force in the bearings, and ultimate bearing capacity analysis.

Keywords:braced hybridstring shell; form design; initial prestress analysis; ultimate bearing capacity