- 摘 要
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（1 合肥工業(yè)大學(xué)土木與水利工程學(xué)院， 合肥 230009; 2 中鐵四局集團鋼結(jié)構(gòu)有限公司， 合肥 230022)
［摘要］霍邱體育中心體育館鋼結(jié)構(gòu)屋蓋為大跨度空間網(wǎng)架結(jié)構(gòu)，采用累積滑移方法拼裝,其卸載過程是空間結(jié)構(gòu)由施工狀態(tài)向設(shè)計狀態(tài)轉(zhuǎn)換的關(guān)鍵環(huán)節(jié)。結(jié)合屋蓋支撐卸載過程的施工特點，提出了一種實用的支撐卸載方法，運用有限元法對卸載過程模擬分析，并對卸載過程屋蓋結(jié)構(gòu)位移和關(guān)鍵構(gòu)件的應(yīng)力進行了實時監(jiān)測。根據(jù)有限元分析和施工過程監(jiān)測的結(jié)果，對該大跨度鋼結(jié)構(gòu)屋面卸載過程的安全性和可行性進行了討論,該卸載方法可為同類型工程提供參考借鑒。
［關(guān)鍵詞］霍邱體育中心體育館； 大跨度空間結(jié)構(gòu)； 卸載； 力學(xué)分析； 施工監(jiān)測； 有限元法
中圖分類號：TU758.11文獻標識碼：A文章編號：1002-848X(2018)11-0070-08
Simulating analysis and monitoring of unloading process of large-span spatial structure
Sun Xuegen1, Niu Zhongrong1, Li Zhaofeng1, Ding Shihong2, Tie Lei2
(1 School of Civil and Hydraulic Engineering，Hefei University of Technology, Hefei 230009, China; 2 Steel Structure Company of CTCE Group 4, Hefei 230022, China)
Abstract:The roof of Huoqiu sports center gymnasium is a large-span spatial steel grid structure, which is constructed by cumulative slip method. The unloading process of the roof is the key step in the transformation of spatial structure work from construction phase to design phase. Based on the characteristics of the unloading process of the roof brace, a practical unloading method of the brace was proposed. The finite element method was used to analyze the unloading process. Furthermore, the displacement of the roof structure and the stress of the key joints were monitored in construction process. Then, safety and feasibility of the unloading process of the large-span steel structure were discussed according to the results of the finite element analysis and construction monitoring. The unloading method proposed could be referred by the similar engineering projects.
Keywords:Huoqiu sports center gymnasium; large-span spatial structure; unloading; mechanical analysis; construction monitoring; finite element method
*國家自然科學(xué)基金資助項目（11272111）。
通訊作者：牛忠榮，博士，教授，博士生導(dǎo)師，Email: niu-zr@hfut.edu.cn。
