The Method Of Sandwich Plate About The Cast-In-Plate Concrete Fabricated Hollow-Ridded Floor

The cast-in-place concrete Fabricated Hollow-ribbed floor is composed by the reinforced concrete beam, the rib beam and the hollow box. It can reduce the thickness floor structure,increase the building height, because of the rib beam spacing small,two-way orthogonal,the cast-in-place concrete Fabricated Hollow-ribbed floor not only have the good behavior,the big stiffness,the small deflection, but also have good overall,light dignity,save materials, insulation,good noise performance. In particular it fit the large span high building floor.In this paper, use the theoretical method and the finite element method analysis the cast-in-place concrete Fabricated Hollow-ribbed floor. Presente the analytical method (the method of sandwich plate) and the deflection calculation method. And solve some floor problems which encountered in works. This paper is divided into five chapters:The first chapter introduce the floor evolutionary process and introduced the structure, performance, construction technology of cast-in-place concrete Fabricated Hollow-ribbed floor two-way rib cavity floor.The second chapter establish the cast-in-place concrete Fabricated Hollow-ribbed floor reasonable calculation model, propose two-way rib cavity floor of the Sandwich Plate this simplified model. Raise the floor theoretical analysis methods,use the sandwich plate method analysis the two-way rib cavity floor, obtaine the deflection and internal forces. Use matlab procedures calculate floor internal forces.The third chapter use the ANSYS establish the cast-in-place concrete Fabricated Hollow-ribbed floor model. The result of the method of sandwich plate is proved to be in good agreement with the finite element model result.The fourth chapter compare the cast-in-place concrete Fabricated Hollow-ribbed floor and the common floor structure, and analysis the same load and boundary conditions under several forms of internal force distribution floor deflection characteristics. The fifth chapter analysis the change of factors which include rib width,rib height and floor thickness impact internal forces and deformation of the cast-in-place concrete Fabricated Hollow-ribbed floor, and other factors are analyzed. Discussed the parameters of a single geometric properties of the floor by the force of the impact, these parameters appropriate range for the design of this floor will provide reference.