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(同濟(jì)大學(xué)建筑設(shè)計(jì)研究院  上海 200092)

［提要］  預(yù)應(yīng)力桁架殼體系是在張弦結(jié)構(gòu)基礎(chǔ)上發(fā)展起來的一種新型空間雜交張拉結(jié)構(gòu)。詳細(xì)介紹了大跨度預(yù)應(yīng)力桁架殼體在2008年奧運(yùn)會乒乓球館——北京大學(xué)體育館復(fù)雜造型屋面中的具體應(yīng)用。包括不規(guī)則曲面屋面的形態(tài)設(shè)計(jì)，屋蓋結(jié)構(gòu)體系的布置特點(diǎn)，荷載取值，初始態(tài)張拉分析，靜力性態(tài)分析，動力分析，非線性屈曲分析以及拉索錨固節(jié)點(diǎn)彈塑性分析等。分析方法和結(jié)果可供類似結(jié)構(gòu)的分析、設(shè)計(jì)參考。

［關(guān)鍵詞］  預(yù)應(yīng)力桁架殼體  形態(tài)設(shè)計(jì)  初始態(tài)張拉分析  靜力性態(tài)分析  非線性屈曲分析

Structural Design of Large-span Pre-stressed Truss Shell System of Beijing Universitytable Tennis Gymnasium for the 2008 Olympic Games/Authors:He Zhijun, Ding Jiemin，Chao Si, Xiao Xiaoling (Architecture Design & Research Institute of Tongji University, Shanghai 200092, China)

Abstract:The pre-stressed truss shell system is a newstyle spatial hybrid tension structure developed on the basis of beam string structure. The application of large-span pre-stressed truss shell system is introduced in complex form roof of Table Tennis Gymnasium for the 2008 Olympic Games——Beijing university gyms in detail, including roof form design of irregular curved surface, the characteristic of the roof structure system, loads calculation, initial tension analysis,static performance analysis, dynamic analysis and nonlinear buckling analysis.Finally, elastoplastic analysis has been performed for the anchor joint of the cable on the bottom chord of the trusses. The analysis procedures and results might be used as reference for the analysis and design of this kind of structures.

Keywords:pre-stressed truss shell system; form design; initial tension analysis; static performance analysis; nonlinear buckling analysis