Nonlinear Finite Element Ultimate Analysis Of Reinforced Concrete Thin Plates With Complex Geometry & Boundary Condition

On the basis of the traditional elasticity theory, nonlinear theory, ultimate theory and theory of reinforced concrete plates with simple-supported condition, this paper analyzes the whole process of reinforced concrete thin plates in the loading test of distributing static load, on the objects of reinforced concrete thin plates with complex geometry, complex boundary condition and distributing of reinforce bars. And then analyzes the load capacity under the effecting of static load.And then, according to finite element theory of reinforced concrete, the program of "Nonlinear Finite Element Ultimate Analysis of Reinforced Concrete Thin Plates With Complex Geometry & Boundary Condition"is made by using the separation model. In this separation model, the concrete element is the triangle element of elastic thin plate;the reinforcing bar is treated as bar element,and using double-spring model simulates the slippage between the reinforcing bar and the concrete. During the analysis, the stress-strain relation by considering concrete as anisotropic material under effecting by two-way stress, and the concrete material model presented by Darwin and Pechnold, and the yield criterion of concrete presented by Kupfer and Gerstle are considered.Finally, according to the research, some feasible advice is put forward for engineering design.