- 摘 要
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(中鐵二十局集團第二工程有限公司, 北京 100013)
摘要: 張家口奧體中心游泳館鋼結(jié)構(gòu)屋蓋提升方案基于沿東西中軸線對稱分布原則,通過改變分區(qū)、提升架的數(shù)量及布置位置,設(shè)置了三種提升方案. 為研究三種提升方案的可行性與合理性,對每種提升方案各階段提升進行全過程跟蹤模擬. 對比分析了三種提升方案的節(jié)點豎向位移、支座反力和桿件應(yīng)力比等,并研究提升不同步性對結(jié)構(gòu)的影響. 結(jié)果表明,三種提升方案中 90%以上桿件的應(yīng)力比集中于 0 ~ 0. 4 范圍內(nèi);剛度較大的混凝土核心筒在提升過程參與受力,能夠提高上部網(wǎng)架、提升架和下部混凝土結(jié)構(gòu)在提升階段的安全儲備;通過合理地布置提升吊點,選用合適的額定提升力的提升設(shè)備,可避免在提升過程中出現(xiàn)較大的因提升不同步造成的位移差,且單點出現(xiàn)最大提升力時不會影響網(wǎng)架的正常提升和造成網(wǎng)架損傷. 對比分析的三種提升方案均具有可行性,且方案三相對更為合理.
關(guān)鍵詞: 張家口奧體中心; 大跨度鋼結(jié)構(gòu)屋蓋; 提升方案; 提升不同步; 有限元分析
中圖分類號:TU74 文獻標志碼:A 文章編號:1002-848X(2023)10-0031-09
DOI:10. 19701 / j. jzjg. LS220342
Comparative study on lifting schemes of steel structure roof of Zhangjiakou Olympic Sports Center Natatorium
CHEN Yaohua
(No. 2 Engineering Corporation Limited of CR20, Beijing 100013, China)
Abstract:Based on the principle of symmetrical distribution along the east-west central axis, the lifting scheme of the steelstructure roof of Zhangjiakou Olympic Sports Center Natatorium has set up three lifting schemes by changing the zoning, thenumber of lifting frames and the layout position. In order to study the feasibility and rationality of the three lifting schemes,a full process tracking simulation was conducted for each lifting scheme at each stage. The vertical displacement of thenodes, the reaction force of the supports, and the stress ratio of the members of the three lifting schemes were compared andanalyzed, and the impact of lifting asynchrony on the structure was studied. The results show that more than 90% of the rodstress ratios in the three lifting schemes are concentrated in the range of 0 to 0. 4. The participation of high rigid concretecore tubes in the lifting process can improve the safety reserve of upper grid structures, lifting frames and lower concretestructures during the lifting stage. By reasonably arranging lifting points and selecting suitable lifting equipment with ratedlifting force, it is possible to avoid large displacement differences caused by unsynchronized lifting during the liftingprocess, and the occurrence of maximum lifting force at a single point will not affect the normal lifting of the grid and causedamage to the grid. The three lifting schemes compared and analyzed are feasible, and the three-phase pair of the schemesis more reasonable.
Keywords:Zhangjiakou Olympic Sports Center; large span steel structure roof; lifting scheme; lifting asynchrony; finiteelement analysis
∗中鐵二十局集團 B 類科研課題(YF2002FJ01B)“大跨度鋼結(jié)構(gòu)網(wǎng)架屋蓋施工技術(shù)研究”.
作者簡介:陳耀華,學士,高級工程師,主要從事工程結(jié)構(gòu)施工技術(shù)研究,Email:353813817@ qq. com.
[引用本文] 陳耀華. 張家口奧體中心游泳館鋼結(jié)構(gòu)屋蓋提升方案對比研究[J]. 建筑結(jié)構(gòu),2023,53(10):31-39,96. CHEN Yaohua. Comparative study on lifting schemes of steel structure roof of Zhangjiakou Olympic Sports CenterNatatorium[J]. Building Structure,2023,53(10):31-39,96.
