Under Horizontal Load Slab In Framework Of Overall Performance Work Study

Frame structure is the most common structural system. However, many research found out that the most common failure mode of frame structure is the column-hinge mechanism, which is inconsistent with the design principle, strong column-weak beam, regulated by current design specification. In practical design, designers usually design structures with the method of separating beam and plate. In research on the impact of floor on the whole frame structure, only the effect of beam’s stiffness and floor’steel bar are considered. But, in fact, the floor and beam work together with columns to form the whole structural system. Columns are the weakest components to be destroyed forming column-hinge mechanism under the horizontal seismic action. The performance and transmission mechanism of the floor in the whole frame structure under the action of horizontal loading is still unclear. Therefore, to study the work performance of the whole frame structure, it is necessary to research the working principle of floor firstly.This paper mainly studies the performance of floor in frame structure under horizontal load considering the impact of vertical load, and the transfer mechanism of nodes on both beams and columns with different geometry size, span, height and thickness. A frame structure with three layers and3×3span is built with PVC, a homogeneous isotropic material. In the experiment, vertical load is simulated with a iron block, and horizontal load is simulated with a weight drop. The participation level of floor in case of different vertical load on the frame structure under horizontal load is archived, besides the recommended values of effective flange width.A simulation model of the experimental frame structure both with and without floor is built with the same material, a finite element software, drawing the effects of floor on the performance of the frame structure. Three levels were set up with reference to span, height, thickness of the floor and the size of beam section and column section. With the orthogonal design method, nine different frame models were built by ABAQUS to research the impact of floor and other factors on vertex displacement, bending moment at the end of beams and columns, axial force and the distribution of stress of floor. Comparing the results of the analysis, the influence degree of the mechanical performance of components on the whole frame structure is drawn.