The Mechanical Performance Of The Reinforced Concrete Slab Under The Action Of Non-uniform Distributed Load Analysis

It is more and more common that slabs bear the force of concentrated or linear load directly, but there are no materials which can be adopted directly by engineering design at present. Therefore, it is of great theoretical importance and engineering value to analyze the physical function of slabs under the effect of linear load and concentrated load.Based on traditional theory of plate and shell, with reinforced concrete slabs fixed at four sides as research subjects, this thesis has analyzed the loaded property of reinforced concrete slabs fixed at four sides in the stage of normal use with a method of finite element analysis. The thesis includes:(1) Under the guide of the theory, the thesis has set up a model of finite element analysis which studies reinforced concrete slabs forced by linear or concentrated load, and made a comparison between the results of finite element data analysis and SlabCAD calculation, concluding that both change in the same direction and match well with each other. The study shows that to simplify partition wall load as linear load complies with the requirement of project and the finite element model set up in this thesis is correct.(2) The thesis has analyzed the influence that the physical dimension of slabs has on bending moment and deflection and come up with the relationships between coefficient of bending moment or deflection and the ratio of sides, and the relationships between bending moment or deflection and thickness of slabs .Besides, this thesis has analyzed the influence of elements such as elastic modulus, Poisson ratio on bending moment and deflection, which is nearly the same as the conclusion drawn from the study on uniform load. Furthermore, it has analyzed the deformation of slabs in different position under the force of linear load and concentrated load and found out the most unfavorable position of load.The weak points of slabs under the force of linear load and concentrated load are found out by deformation chart; the calculation form of bending moment and deflection under the force of linear load is set by regression analysis according to large numbers of data; the conclusion that both linear load and concentrated load are two-way slabs, and the bending moment of square slab under the force of linear load is not the same in length and width, which are different from that of uniform load, is drawn in this thesis. According to this thesis, the bending moment and deflection under the force of non-uniform load can be calculated quickly and the deflection can be verified. This thesis is of theoretical importance and reference value of engineering.