The Theoretical Analysis Of Steel-concrete Composite Hollow Floor

Puts forward a new type of steel and concrete composite hollow floor,the floor is composed of thin plate bending,cast-in-situ concrete upper and precast slab composite structure,is based on the traditional development and innovation of the cast-in-place hollow floor slab floor.Because the steel-concrete composite hollow floor is an innovative structural form,the stress characteristics and deformation mechanism of the floor are studied.At first,this paper expounds the structure of steel and concrete composite hollow floor,mechanical characteristics and main advantages,and then the load floor under uniformly distributed load test,and HOFF sandwich plate theory is adopted to establish the equation of sandwich plate method,establish a calculation model for the steel and concrete composite hollow floor,the floor is simplified to equivalent sandwich plate,the floor is deduced under the action of vertical load on two aspects of sandwich layer and surface of sandwich layer superposition theory formula,which provides theoretical basis for follow-up study.Through ANSYS finite element software,the finite element analysis is carried out to analyze the finite element analysis results and test results.Studies have shown that steel and concrete composite hollow floor with ribbed beams with concrete hollow floor stress performance difference,and the steel frame beam is obtained to improve the performance of the hollow floor structure weight and stress good conclusion.The bending sheet steel plate with a height of 300 mm can meet the requirements of the economy of hollow floor,and also has excellent performance in resisting load and satisfying the use function.The use of steel ribbed beams has greatly reduced the self-weight of the building structure and improved the stress and deformation properties of the building structure,which is suitable for use in the large-span large-span construction structure.It provides reference for further theoretical research and engineering design of hollow floor structure of steel-concrete composite.