型钢混凝土结构整体提升施工仿真分析研究

发布时间：2019-06-09 14:27

【摘要】：型钢混凝土结构以其良好的力学性能、优越的经济性能、突出的综合效益在高大空间结构中应用日益广泛。型钢混凝土结构属于组合结构,由型钢、钢筋、混凝土等组成的结构体系,因施工顺序不一样,在结构中产生的次应力将不一样。结构中施工产生的次应力,有可能对结构中的安全性产生影响。本文以采用型钢混凝土结构的柳东新区企业总部办公大楼建设为背景,对型钢混凝土结构的整体提升施工方法的影响进行研究。柳东新区企业总部办公大楼是单体工程,地下两层,地上二十层。其结构形式为框架核心筒结构(带桁架转换层)。转换层钢桁架共四榀,位于七~十五层楼面,钢桁架净跨度50.60米,高度34.30米,钢桁架底距离地下室底板面35.60米,距离拼装区地面34.60米。该工程转换层桁架采用新型型钢混凝土结构形式,原设计的施工方法为逐层建立型钢骨架,逐层浇筑混凝土,该方法施工周期长,且不便于实施。文中提出对型钢骨架先进行整体提升,然后再逐层浇筑混凝土,形成型钢混凝土结构,该方法具有施工方便、施工周期短、能节约大量成本等特点,但对结构施工过程的安全性,需要进行仿真分析。本文先详细研究了型钢混凝土结构构件的力学性能和结构整体提升施工的施工过程,然后对钢桁架整体提升及荷载转换过程的结构受力分析进行了研究,之后在混凝土浇筑过程中,对浇筑支撑结构及基础承载力进行了分析,最后对逐层浇筑混凝土过程中,对型钢混凝土结构进行了仿真分析。对转换层钢桁架施工过程的分析,采用分步建模的方式模拟其在施工过程中的内力变化。研究结果表明,型钢混凝土结构整体提升施工法,能确保结构的安全性。本文的研究方法及结论为型钢混凝土桁架在施工过程中的受力安全性及施工措施提供了依据,也为类似结构的设计和施工提供可参考的经验。
[Abstract]:Steel reinforced concrete (SRC) structures are widely used in large spatial structures because of their good mechanical properties, superior economic properties and outstanding comprehensive benefits. Steel reinforced concrete (SRC) structure belongs to composite structure, which is composed of section steel, steel bar, concrete and so on. Because of the different construction sequence, the secondary stress produced in the structure will be different. The secondary stress produced by construction in the structure may have an impact on the safety of the structure. Based on the construction of Liudong New District enterprise headquarters office building with steel reinforced concrete structure, the influence of the overall lifting construction method of steel reinforced concrete structure is studied in this paper. Liudong New District Enterprise headquarters Office Building is a single project, two floors underground, 20 floors on the ground. Its structure form is the frame core tube structure (with truss conversion layer). There are four steel trusses on the transfer floor, which are located on the seventh to fifteenth floor. The net span of the steel trusses is 50.60 meters and the height is 34.30 meters. The bottom of the steel trusses is 35.60 meters from the basement floor and 34.60 meters from the ground of the assembly area. The transfer story truss of the project adopts a new type of steel reinforced concrete structure. The original design construction method is to establish the section steel skeleton layer by layer and pouring concrete layer by layer. The construction period of this method is long and it is not easy to implement. In this paper, it is put forward that the section steel skeleton is promoted as a whole, and then concrete is poured layer by layer to form the section steel concrete structure. This method has the characteristics of convenient construction, short construction cycle, and can save a lot of cost. However, the safety of the structure construction process needs to be simulated and analyzed. In this paper, the mechanical properties of steel reinforced concrete structural members and the construction process of the whole lifting construction of the structure are studied in detail, and then the structural stress analysis of the whole lifting and load transfer process of steel truss is studied. Then, in the process of concrete pouring, the bearing capacity of pouring support structure and foundation is analyzed. Finally, the steel reinforced concrete structure is simulated and analyzed in the process of pouring concrete layer by layer. Based on the analysis of the construction process of steel truss in transfer story, the internal force change of steel truss in the construction process is simulated by step modeling. The results show that the whole lifting construction method of steel reinforced concrete structure can ensure the safety of the structure. The research methods and conclusions of this paper provide the basis for the stress safety and construction measures of steel reinforced concrete trusses in the construction process, and also provide reference experience for the design and construction of similar structures.
【学位授予单位】：广西科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU755

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