| The assembled monolithic hollow floor is a new floor system that can applicable tolong-span building. It is composed of cast-in-site ribs box and the prefabricated concreteribbed beams that reduce the floor weight, improve the hollow rate and the stiffness offloor,at the same time,it improves the crack resistance of floor and has the advantages ofstandardization and industrialization, It conform to the requirements of the "housingindustrialization" and meet the regulation of the green building’s "low carbon energyconservation and environmental protection". It has been widely promoted and used in partsof our country, we believe that it will greater development and advance.This article mainly be the finite element numerical simulation analysis and calculationof the assembled monolithic hollow floor,analysis its stiffness change by changing thethickness of the roof floor and reinforcement, the thickness of the bottom floor andreinforcement, the height of the rib beam and reinforcement,regardless of the effect of thebottom floor several aspects, to establishing the finite element model, analyzes the stiffnesschang. With the aid of relevant literature and data, march its stiffness calculation and get thestiffness simplified calculation formula of the assembled monolithic hollow floor by settingshort-term stiffness calculation parameters, Finally, verify the stiffness formula by anexample Therefore, It composed of a total of five parts, the third chapter and the fourthchapter is the main work in this paper.(1) In the first chapter, summarizes the common floor system both at home andabroad, mainly introduces the assembled monolithic hollow floor’s structure system andperformance.(2) In the second chapter, mainly introduces the finite element software of ANSYS theinvolve of this article, mainly including concrete units, steel element, the constitutiverelation, failure criteria, loading and solving etc. Finally, establishing the finite elementmodel of the assembled monolithic hollow floor by the premise resources of the literature.(3) In the third chapter, The main purpose of the chapter is the finite element model simulation analysis by changing the thickness of the roof floor and reinforcement, thethickness of the bottom floor and reinforcement, the height of the rib beam andreinforcement,regardless of the effect of the bottom floor several aspects, controlled studythe results of analysis and qualitative research the influence of the structural stiffness.(4)In the fourth chapter, analysis the shear lag phenomenon of the roof floor andcalculate the stiffness of the model by the effective moment of inertia method. get theshort-term stiffness simplified calculation formula of the assembled monolithic hollow floorby setting the parameters of the short-term stiffness calculation formula range and beverified by an example. |
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