超高层转换层施工技术的研究

发布时间：2018-06-06 13:03

本文选题：超高层转换层 + 支撑体系　；参考：《天津大学》2014年硕士论文

【摘要】：近来,大厦的功能越来越复杂,在不同的楼层需要不同的功能,因此需要结构设置不同的开间和户型。以建筑的角度来看,上部需要小开间作为公寓住宅等,中部需要中等开间作为办公室等,而下部则需要较大开间作为商业区和活动中心。本文主要介绍了超高层建筑转换层支撑体系的种类、基本要求、设计难点、施工技术及要点,采用ABAQUS有限元分析方法对钢筋混凝土梁式转换层和型钢混凝土梁式转换层进行了数值模拟,对不同支撑方案进行了模拟计算。通过数值模拟与计算对比得出以下结论:有限元软件ABAQUS能够有效地模拟结构整个受力过程,完整地呈现结构的变形结果,观察整个结构在受力过程中的荷载情况,随时监测结构以及单元的变形发展情况,从客观的角度来指导施工,根据各结构构件的实际受力情况布置支撑,对实际的工程具有指导意义。通过对型钢混凝土梁式转换层的仿真模拟得出,采用荷载传递法施工时,需要支撑的最少层数为三层,下层楼板的受力才能满足要求;使用叠合浇筑法施工时,在第一次浇筑完成,开始第二次浇筑之前应考虑拆除支撑,否则在浇筑第二层时,支撑会将已经浇筑的转换层部分的所有重量传递到下部楼板梁上,导致结构的破坏,也无法发挥已浇筑的第一层混凝土承担后浇荷载的功能。
[Abstract]:Recently, the functions of buildings are becoming more and more complex, and different functions are required on different floors. From the architectural point of view, the upper part needs small cubicles as apartment houses, the middle needs medium rooms as offices, and the lower part needs larger rooms as business districts and activity centers. This paper mainly introduces the types, basic requirements, design difficulties, construction techniques and key points of the support system for the transfer story of the super high-rise building. The ABAQUS finite element analysis method is used to simulate the transfer layer of reinforced concrete beam and the transfer layer of steel reinforced concrete beam, and the different supporting schemes are simulated and calculated. Through the comparison of numerical simulation and calculation, the following conclusions are drawn: the finite element software ABAQUS can effectively simulate the whole stress process of the structure, present the deformation result of the structure completely, and observe the load situation of the whole structure during the course of loading. Monitoring the deformation development of structure and unit at any time, guiding construction from an objective point of view, arranging support according to the actual stress situation of each structural member, which has guiding significance for actual engineering. Through the simulation of the steel reinforced concrete beam transfer layer, it is concluded that when the load transfer method is adopted, the minimum number of layers to be supported is three stories, and the stress of the lower floor slab can meet the requirements, while the superimposed pouring method is used in the construction. When the first pouring is completed and the second pouring is started, consideration should be given to removing the support; otherwise, when the second floor is poured, the support will transfer all the weight of the part of the already poured transfer layer to the lower floor beam, resulting in the destruction of the structure. It is also unable to exert the function of the first layer concrete which has been poured to bear the post-pouring load.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU974

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