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( 同濟大學建筑設計研究院，上海200092)

［提要］泉州市體育館的橢球型屋蓋采用張弦桁架支撐殼體。重點介紹了該結構在分析和設計中的關鍵問題：利用NURBS造型技術生成泉州體育館非規(guī)則屋蓋曲面、結構體系布置；結合工程實例提出了張弦桁架結構拉索初始預應力取值的若干原則以及合理處理支座水平推力的方法；利用彈塑性方法分析其穩(wěn)定性和極限承載力以說明張弦結構優(yōu)異的力學性態(tài)。

［關鍵詞］張弦桁架；支撐殼體；形態(tài)設計；初始預應力度分析；極限承載力

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