(中铁二十局集团第二工程有限公司, 北京 100013)

摘要: 张家口奥体中心游泳馆钢结构屋盖提升方案基于沿东西中轴线对称分布原则,通过改变分区、提升架的数量及布置位置,设置了三种提升方案. 为研究三种提升方案的可行性与合理性,对每种提升方案各阶段提升进行全过程跟踪模拟. 对比分析了三种提升方案的节点竖向位移、支座反力和杆件应力比等,并研究提升不同步性对结构的影响. 结果表明,三种提升方案中 90%以上杆件的应力比集中于 0 ~ 0. 4 范围内;刚度较大的混凝土核心筒在提升过程参与受力,能够提高上部网架、提升架和下部混凝土结构在提升阶段的安全储备;通过合理地布置提升吊点,选用合适的额定提升力的提升设备,可避免在提升过程中出现较大的因提升不同步造成的位移差,且单点出现最大提升力时不会影响网架的正常提升和造成网架损伤. 对比分析的三种提升方案均具有可行性,且方案三相对更为合理.

关键词: 张家口奥体中心; 大跨度钢结构屋盖; 提升方案; 提升不同步; 有限元分析

中图分类号:TU74 文献标志码:A 文章编号: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

∗中铁二十局集团 B 类科研课题(YF2002FJ01B)“大跨度钢结构网架屋盖施工技术研究”.

作者简介:陈耀华,学士,高级工程师,主要从事工程结构施工技术研究,Email:353813817@ qq. com.

[引用本文] 陈耀华. 张家口奥体中心游泳馆钢结构屋盖提升方案对比研究[J]. 建筑结构,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.