大跨正交空间管桁架提升施工分析
2020-08-10陈文杰
陈文杰



摘 要:长白山站高铁站房屋盖结构形式为为正交空间管桁架结构,结构提升分为两个提升区,拟采用楼面原位拼装,再利用液压系统进行同步整体提升的施工方案。为确保在提升过程中各处结构安全稳定,采用有限元分析软件MIDAS对结构分区进行建模分析,结果表明:在各区的关键施工过程工况的计算中,结构各处位移变形、应力、反力均满足设计要求。分析过程严谨,计算结果具有较高精确性,为同类工程的分析研究提供了借鉴。
关键词:空间管桁架;整体提升;有限元法
中图分类号:TU393.3 文献标识码:A
Abstract: the structure of high-speed railway station house cover of Changbaishan station is orthogonal space pipe truss structure, and the structure lifting is divided into two lifting areas. It is proposed to adopt the construction scheme that the floor is assembled in situ, and then the hydraulic system is used for synchronous overall lifting. In order to ensure the safety and stability of the structure in the lifting process, the finite element analysis software MIDAS is used to model and analyze the structural zones. The results show that the displacement, deformation, stress and reaction of the structure meet the design requirements in the calculation of the key construction process conditions of each zone. The analysis process is rigorous and the calculation results are highly accurate, which provides a reference for the analysis and research of similar projects.
Key words: space pipe truss; Overall improvement; Finite element method
1 引言
隨着近些年来我国对公共建筑要求的不断提高,使得(大跨度)空间结构受到广泛青睐,一些以火车站、机场、体育馆等为代表的大跨度空间钢结构建筑迅速在各大城市落地。但由于大跨度空间钢结构工程在提升及拼接过程中的施工难度和复杂特性,也促使越来越多针对此类工程的研究,如陈明、孙佳佳[1]针对哈尔滨某滑雪场大跨度管桁架屋盖提升施工中的问题,采用多尺度有限元法,研究了施工过程中各杆件及吊点的受力性能;卢来运[2]等对大跨度双层穹顶网架高空拼接施工方法进行了探究;赵海燕[3]依托天水体育场空间管桁架吊装拼接的实际工程,利用MIDAS有限元分析结合现场实际动态应变监测,研究并评估了结构施工过程的安全性;王涛[4]运用有限元软件对某机库钢结构网架屋盖整体提升工程进行不同步……
