Studies On Mechanical Behavior And Design Methods For Flat Slabs Subjected To Level Loads

As a widely used modern structure, flat slabs can be seen in practical construction and reconstruction of building existing with more requirement for function. The floor height of slab-column structure is relatively small and its construction is convenient, it will be firstly adopted if the height of building is restricted , and its economy benefit will be very marked. By means of the academic analysis, the finite element analysis and the test. This paper discusses the calculating width of the equivalent beam of slab-column structure subjected to level load, the failure pattern of the interior joint for slab-column structure, and it's mechanic characteristics.Thirteen finite element analysis models of flat-plate structures with different dimensions were established in order to reveal the relationship between the effective beam width and the frame dimensions. Ansys finite element structural program was used in the elastic analysis of structures under lateral load. The internal relationship between the effective beam width and the frame dimensions was studied and the formula for calculating the effective beam width was discussed.Based on the finite element analysis and the incorporation of analysis results of previous tests at home and abroad, this paper describes the loading properties,failure mechanism and the failure pattern of the interior slab-column connection in RC flat slab structures under the combined action of punching shear and unbalanced moment. A method of calculating bending failure and shear failure of interior slab-column connections is presented in this paper. The load-displacement hysteresis curves,the ductility characteristic and the capacity for dissipating energy of the slab-column structure are analyzed.