- 摘 要
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(1 中機(jī)國際工程設(shè)計(jì)研究院有限責(zé)任公司， 長沙 410007；2 中國水利水電第八工程局有限公司， 長沙 410004)
［摘要］以某標(biāo)識性拱門項(xiàng)目為例，介紹了大跨度空間鋼管桁架的設(shè)計(jì)要點(diǎn)。采用MIDAS軟件對結(jié)構(gòu)進(jìn)行整體受力和位移分析、非線性穩(wěn)定性分析、復(fù)雜節(jié)點(diǎn)受力分析以及施工階段模擬分析。分析結(jié)果表明，該結(jié)構(gòu)位移及強(qiáng)度滿足規(guī)范要求，其整體穩(wěn)定性較強(qiáng)，關(guān)鍵復(fù)雜節(jié)點(diǎn)受力性能良好，施工階段模擬分析能夠保障支撐胎架拆除階段整體的結(jié)構(gòu)安全性。對于類似大跨度項(xiàng)目，應(yīng)對結(jié)構(gòu)關(guān)鍵節(jié)點(diǎn)進(jìn)行針對性分析，并充分結(jié)合現(xiàn)場施工組織，對施工過程中結(jié)構(gòu)內(nèi)力變化進(jìn)行綜合評估。
［關(guān)鍵詞］大跨度；鋼管桁架結(jié)構(gòu)；整體穩(wěn)定性；節(jié)點(diǎn)受力分析；施工模擬
中圖分類號：TU323-4 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)21-0059-05
Structural design of a large-span space steel pipe truss arch
XIE Dan1, YI Sirong2, GUO Ning1, PENG Zhu1, ZHUO Bin1
(1 China Machinery International Engineering Design & Research Institute Co., Ltd., Changsha 410007， China；2 Hydropower Eighth Engineering Bureau Co., Ltd., Changsha 410004， China)
Abstract: Take an iconic arch project as an example,The design key points of a large-span space steel pipe truss were introduced. The MIDAS software was used to perform overall force and deformation analysis, nonlinear stability analysis, force analysis of complex nodes, and simulation of the construction stages. The analysis results show that the displacement and strength of the structure meet the requirements of the specification, its overall stability is strong, and the key and complex nodes possess good mechanical performance. The simulation analysis during the construction phase can ensure the overall structural safety at the removal phase of supporting tire frames. For similar long-span projects, the targeted analysis should be carried out for key structural nodes, and a comprehensive assessment of the internal force changes of the structure during the construction process should be fully combined with the on-site construction organization.
Keywords:large-span; steel pipe truss structure； overall stability； node force analysis； construction simulation
作者簡介：謝丹，學(xué)士，高級工程師，Email:2417901908@qq.com； 通信作者：郭寧，碩士，高級工程師，Email:guoning@cmie.cn。
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