Abstract
A nonlinear finite element (FEM) three-dimensional model introduced in this investigation well qualified for the examination of different reinforced concrete (RC) slabs till to failure. Three-dimensional isoperimetric quadratic elements with 20-node used to simulate the concrete, while an embedded within the concrete element of one-dimensional axial members applied to simulate the reinforcing bars. Carbon fiber reinforcement laminates were simulate as element externally attached to the brick element. During the loading process, there is an ideal bond connecting the concrete and reinforcing bars in the analysis. Hardening model of elasto-plastic work using to emulate the performance of concrete in compression then it followed by response with a completely plastic and finally is discontinue at the inception of crushing. Two crack patterns with (fixed orthogonal and a smeared crack model) with a tension-stiffening design has been adopted to simulate the concrete in tension with the incorporation of retained tensile stress of post-cracking models and due to cracking a shear retention design that remodel the rigidity of shear modulus. The Modified-Newton Raphson methods including an incremental-iterative technique used for solving the nonlinear equations of equilibrium. A force convergence criterion used to control the convergence of the solution. Integration rule with 27-Gaussian quadrature used as numerical integration in this analysis. The acquire results from the FE analysis are the slabs load-deflection response and stress distribution with numerous parametric investigations to examine the impact of some significant FE and material parameters. In overall, sufficient compromise between the FE solutions and the laboratory results has been achieved.
Published Version
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