- 摘 要
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（1 內(nèi)蒙古科技大學鋼結(jié)構(gòu)與空間結(jié)構(gòu)研究所， 包頭 014010； 2 浙江精工鋼結(jié)構(gòu)集團有限公司， 紹興 312030）
［摘要］針對大跨度鋼結(jié)構(gòu)施工過程中較為復雜的受力問題，以哈爾濱某滑雪場工程為例，對其鋼桁架屋蓋進行施工過程模擬分析，研究了由施工產(chǎn)生的附加應(yīng)力對桿件的影響；利用有限元方法，分析提升吊具的強度和剛度；通過多尺度有限元法，探究提升吊點的受力性能。結(jié)果表明：在考慮了不同步效應(yīng)的提升施工中，被提升結(jié)構(gòu)的桿件強度能夠滿足要求；提升架在提升反力等荷載作用下，能夠滿足設(shè)計要求；由于附加應(yīng)力的存在，需對不滿足承載力要求的桿件進行替換；提升吊具和吊點均滿足設(shè)計要求。分析中多個計算參數(shù)的選擇，具有較高的準確性，對同類工程分析研究有借鑒意義。
［關(guān)鍵詞］大跨度鋼桁架； 提升施工； 有限元分析； 應(yīng)力比
中圖分類號：TU392-5文獻標識碼：A文章編號：1002-848X(2016)23-0073-06
Lifting construction analysis on a large-span steel truss roof structure
Chen Ming1， Sun Jiajia1， Zheng Bo2
（1 Institute of Steel and Spatial Structure, Inner Mongolia University of Science and Technology, Baotou 014010, China； 2 Zhejiang Jinggong Steel Building Group Co., Ltd., Shaoxing 312030, China)
Abstract:A ski field project in Harbin was taken as an example to study the complex mechanical problems in large-span steel structure construction process. Construction process simulation analysis was carried out on its steel truss roof to study the influence of construction-generated additional stress on the members. The finite element analysis method was used to analyze the strength and stiffness of the lifting tools. Multi-scale finite element analysis method was used to study the mechanical properties of the lifting points. Results show that: the bar strength of lifted structure can meet the requirements in lifting construction when considering the non-synchronous effect; lifting frame can meet the design requirements under lifting reaction force loads; the bars that cannot meet the bearing capacity requirements should be replaced due to the existence of the additional stress; lifting tools and lifting points fulfill design requirements. The selection of various calculation parameters in analysis is accurate, providing reference significance for analysis and study of similar engineering.
Keywords:large-span steel truss; lifting construction; finite element analysis; stress ratio
作者簡介：陳明，博士，教授，碩士生導師，學術(shù)副院長，Email：cmlx-1978@163.com。
