Study On Mechanical Behaviors Of Hollow Thick Plate Transition Storey

In recent years, the fuction of high-rise building is becoming more and more complex, therefor, the nomal structure can not satisfy the demands of strength, rigity and ductility. Establishing thick plate transition storey is a necessary structural form, when the small size column grids at the up storey is changed into large size column grids at the bottom storey. At the present time, a lot of projects are adopted the transition storey, however most of them are the beam transition storey. The thick plate transition storey should be also adopted in the high-rise building, the layout of which column grids are irregular and whose shape is complex. However, the application of the thick plate transition storey in high-rise building is restrictted by it's disadvantage such as the very heavy self weight, hydration heat, and so on. So as to solve the engineering technology problem of the thick plate transition storey in high-rise building, therefor, the concept of hollow thick plate transition storey is proposed base on the study of analysis of bearing mechanism of the thick plate transition storey, and the research on bearing capacity and bearing mechanism is done in this paper.It is analysed to the thick plate of various layout of the shearing wall and column using the finite element method in this thesis. According to the results of the analysis, the bearing mechanism of the thick plate transition storey is accordance with the model of the space truss. Base on the space truss model, we discuss how to establish the space truss model of the thick plate transition storey and how to establish the hollow thick plate transition storey. That is the high strength concrete is used in main compression member, and the concrete is removed at the other part of the secondary. Then the hollow slab is formed (i.e. the hollow thick plate transition storey is established). Then the relationship between splitting strength and tensile strength is deduced using the existing test data. Base on the bearing mechanism of the thick plate transition storey, it is determined how to choose the material and design of the compression member and tension member for the hollow thick plate. And the thickness of the thick plate is also determined in this thesis.