The Method Of Sandwich Plate About Thin-Wall Cast-in-Site Reinforced Hollow-Ridded Floor

The thin-wall Cast-in-site Reinforced Concrete Hollow floor new type floor system, and is composed by the reinforced concrete beam, the rib beam and the hollow box.This new type of floor has the advantages of higher rigidity,smaller deflection,lower structural height, the visual effect is better than the others.Because of lighter weight,it reduced the usage of concrete and reinforced bar and integrative cost.In this article, the thin-wall Cast-in-site Reinforced Concrete Hollow floor is analyzed in the method of sandwich plate,the analytic solutions is obtained under vertical load,then reasonable finite models for this type of floor were established, the geometrical non-linearity of this floor is researched.(1) The floor evolutionary process and merits and faults of kinds of floor is introduced in Chapter one.(2) Such plate is analyzed continuously in the sandwich plate method,the deflection and internal forces is obtained.Use matlab procedures calculate floor internal forces.(3) With the universal finite element software ANSYS, reasonable finite models is established for this floor, and a static analysis is made under vertical load, The result of the method of sandwich plate is proved to be in good agreement with the finite element model result.(4) The geometrical non-linearity of this floor is researched.Compared to the results,whether the geometrical non-linearity should be ignored or not.The result will provide reference for the design of this floor.