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(1 同濟(jì)大學(xué)建筑設(shè)計(jì)研究院，上海200092； 2 上海建筑設(shè)計(jì)研究院有限公司，200041)

［提要］復(fù)旦大學(xué)正大體育館鋼屋蓋采用了拱-索-空間鋼桁架的結(jié)構(gòu)體系，受力復(fù)雜。利用ANSYS軟件，較真實(shí)地模擬屋蓋的邊界條件和支座剛度的影響，分析了拉索的初始預(yù)拉力取值。對(duì)屋蓋進(jìn)行了動(dòng)力特性、抗震性能及整體穩(wěn)定性分析，結(jié)果表明，結(jié)構(gòu)低階振型以水平振型為主，拉索預(yù)拉力對(duì)結(jié)構(gòu)的內(nèi)力影響較小，結(jié)構(gòu)具有較好的抗震性能。

［關(guān)鍵詞］鋼屋蓋；結(jié)構(gòu)設(shè)計(jì)；預(yù)拉力；動(dòng)力分析；抗震性能；整體穩(wěn)定性

Steel Roof Structure Design of Fudan Zhengda Gymnasium/Ding Jiemin¹,Shen Zhongxian²,Lu Xiuli¹,Yu Zhongjun¹(1 Architecture Design & Research Institute of Tongji University,Shanghai 200092,China; 2 Shanghai Institute of Architecture Design & Research Co.,Ltd.,Shanghai 200092,China)

Abstract:The arch,cable and spatial steel truss system is adopted in the roof structure of Fudan Zhengda gymansium.The ANSYS software is used to analyze the pretension of cable based on truly simulating the boundary condition and supporting rigidity.The vibration characteristic,seismic performance and integer stability of roof structure are analyzed.The calculation results show that the vibration characters low stage horizontal tremble.The pretension of the cable has little effect on the structure bearing capacity,and the structure has good seismic performance.

Keywords:steel roof; structure design; pretension; seismic performance; integer stability