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（1 北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045； 2 中國(guó)科學(xué)院高能物理研究所， 北京  100049；3 中國(guó)科學(xué)院大學(xué)， 北京 100049； 4 浙江大學(xué)建筑工程學(xué)院， 杭州 310058）

［摘要］江門中微子實(shí)驗(yàn)（JUNO）中心探測(cè)器主體不銹鋼結(jié)構(gòu)工程屬于國(guó)家重大科技基礎(chǔ)設(shè)施建設(shè)項(xiàng)目。首先根據(jù)工程的設(shè)計(jì)要求，以降低有機(jī)玻璃的應(yīng)力水平為主要目標(biāo)，在前期研討成果基礎(chǔ)上進(jìn)一步確定主體結(jié)構(gòu)體系為單層不銹鋼網(wǎng)殼+590個(gè)不銹鋼撐桿+有機(jī)玻璃球+底部支承結(jié)構(gòu)。針對(duì)本工程的重點(diǎn)和難點(diǎn)，逐一對(duì)結(jié)構(gòu)的穩(wěn)定性、結(jié)構(gòu)關(guān)鍵構(gòu)件的內(nèi)力分布、地下地震動(dòng)參數(shù)分布規(guī)律、流固耦合效應(yīng)、關(guān)鍵節(jié)點(diǎn)的應(yīng)力狀態(tài)、施工過程對(duì)結(jié)構(gòu)的影響等方面展開深入的研究，完成一系列的有限元分析及力學(xué)試驗(yàn)研究工作。有限元分析及力學(xué)試驗(yàn)結(jié)果表明，通過對(duì)不銹鋼撐桿的內(nèi)力分布和幅值的優(yōu)化設(shè)計(jì)，有機(jī)玻璃的應(yīng)力水平得到了有效控制，運(yùn)行工況下最大主拉應(yīng)力不大于4MPa；考慮非線性及初始缺陷的結(jié)構(gòu)整體穩(wěn)定性系數(shù)為3-45。主體不銹鋼結(jié)構(gòu)具有良好的承載力和穩(wěn)定性，滿足設(shè)計(jì)要求。

［關(guān)鍵詞］江門中微子實(shí)驗(yàn)； 有機(jī)玻璃； 不銹鋼； 單層網(wǎng)殼； 穩(wěn)定性； 流固耦合； 地震響應(yīng)

中圖分類號(hào)：TU973文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)20-0092-06

Design and research of the main stainless steel structure of the central detector of Jiangmen Underground Neutrino Observatory

Li Huafeng1, Zhu Zhongyi1, Shu Weinong1, Qin Kai1, Heng Yuekun2,3, Wang Zhe1, Wang Yi1, Zheng Yanfeng4

(1 Beijing Institute of Architectural Design, Beijing 100045, China； 2 The Institute of High Energy Physics of the Chinese  Academy of Sciences,  Beijing 100049, China； 3 Chinese Academy of Sciences, Beijing 100049, China；4 College of Civil Engineering and Architecture， Zhejiang University, Hangzhou 310058, China)

Abstract:Jiangmen Underground Neutrino Observatory (JUNO) central detector main stainless steel structure project is a major national science and technology infrastructure construction project. Firstly, according to the design requirements of this project, based on the results of the previous research, the main structural system was further determined to be a single-layer stainless steel mesh shell + 590 stainless steel struts+ acrylic balls+bottom support structure  with the aim of reducing the stress level of acrylic. In view of the key points and difficulties of the project, the stability of the structure, the internal force distribution of the key components of the structure, the distribution law of the ground motion parameters, the fluid-solid coupling effect, the stress state of the key nodes, and the influence of the construction process on the structure were conducted in-depth research, a series of finite element analysis and mechanical test research work were completed. The results of finite element analysis and mechanical tests show that the stress level of acrylic is effectively controlled by the optimization of internal force distribution and amplitude of stainless steel struts. The maximum tensile stress under operating conditions is not more than 4MPa. The overall structural stability coefficient of the structure considering nonlinear and initial defects is 3-45. The main stainless steel structure has good bearing capacity and stability to meet the design requirements.

Keywords:Jiangmen Underground Neutrino Observatory(JUNO); acrylic; stainless steel; single layer shell; stability; fluid-structure coupling; seismic response

作者簡(jiǎn)介：李華峰，碩士，高級(jí)工程師，Email：lihuafeng@biad.com.cn。