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（1 土木工程安全與耐久教育部重點實驗室，清華大學(xué)土木工程系，北京 100084；2 中國建筑科學(xué)研究院深圳分院，深圳 518057； 3 珠海晶藝玻璃工程有限公司，珠海 519070）

［摘要］新加坡植物園Cool Moist溫室主體采用異型拱-殼鋼結(jié)構(gòu)體系，殼體上設(shè)置由雙層玻璃構(gòu)成的幕墻體系，大拱之間增設(shè)部分拉索以增強側(cè)向穩(wěn)定性。基于該工程的諸多特殊性，利用兩種有限元軟件對其設(shè)計進行優(yōu)化和計算復(fù)核，并對考慮幾何非線性條件下此類結(jié)構(gòu)的彈性和彈塑性整體穩(wěn)定性能進行評估和分析。通過設(shè)計優(yōu)化，將大拱柱腳的連接方式由鉸接改為剛接，并有效地提高了材料利用率。結(jié)構(gòu)的特征值屈曲分析及幾何材料雙非線性全過程分析表明，結(jié)構(gòu)的穩(wěn)定承載力滿足要求。

［關(guān)鍵詞］拱殼結(jié)構(gòu)； 設(shè)計優(yōu)化； 整體穩(wěn)定性； 極限承載力

Design optimization and global stability analysis for Cool Moist Conservatory at Gardens by the Bay in Singapore

Shi Yongjiu1, Gao Yang1, Wang Yuanqing1, Zhang Zhaoyi2, Li Guoxing3

（1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,  Department of Civil

Engineering, Tsinghua University, Beijing 100084, China; 2 Shenzhen Institute China Academy of Building Research,

 Shenzhen 518057, China; 3 Zhuhai King Glass Engineering Co., Ltd., Zhuhai 519070, China）

Abstract:Due to the demand of architecture profile, the structural system of  Cool Moist Conservatory at Gardens by the Bay in Singapore is complex. It consists of a shell-arch steel structure with a double glazed skin that sits directly on the shell, and tensioned cables are set between large arches to increase lateral stability capacity. Based on such special properties for this project, two finite element analysis softwares were used to make design optimization and calculation verification. The global stability taking account of geometry nonlinear elastic and elasto-plastic conditions were evaluated and analyzed. Through the design optimization, the connection type of arch bases was changed from hinge to rigid and the material utilization was enhanced effectively. The buckling analysis and nonlinear full-range analysis with both geometrical and material nonlinearity showed that the stable bearing capacity met the requirements.

Keywords:arch-shell structure; design optimization; global stability; ultimate bearing capacity  

KGE研究基金(200802)。

作者簡介：石永久，博士，教授，Email: shiyj@mail.tsinghua.edu.cn。

參考文獻

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［4］ 王元清，石永久，高陽，等. 新加坡植物園展覽溫室結(jié)構(gòu)設(shè)計與相關(guān)技術(shù)研究［C］//第九屆全國現(xiàn)代結(jié)構(gòu)工程學(xué)術(shù)研討會論文集. 北京：工業(yè)建筑雜志社，2009：91-102.

［5］ Techwell Engineering Limited. Cool Moist calculation report［R］. Zhuhai: Member of CAE Group, 2009.

［6］ Steel Structures and Glass Buildings Research Institute. Cool Moist ANSYS verification report［R］. Beijing: Tsinghua University, 2009.