Abstract

JUAREZ-LUNA, Gelacio  and  CABALLERO-GARATACHEA, Omar. Design Coefficients and Cracking Paths of Circular, Elliptic and Triangular Isolated Slabs. Ing. invest. y tecnol. [online]. 2014, vol.15, n.1, pp.103-123. ISSN 2594-0732.

Design coefficients and cracking paths for circular, elliptical and triangular labsare obtained by damage mechanics were determined. The nonlinear behavior of the reinforced concrete was simulated with a damage model which considers softening, whereas the behavior of the reinforcing steel was modeling with a bilinear plasticity model which has a Von Mises yield surface. The constitutive models and the finite element method were validated by comparing the computed numerical results with the experimental results of a rectangular slab reported in the scientific literature. The distribution of the reinforcing steel was proposed based on linear elastic analysis with plate elements. The coefficients were computed with elastic and nonlinear analyses, noticing that the last has a variation because of the stress redistribution. The crack paths are shown, which are dependent on the boundary conditions. The coefficients and the distribution of the reinforcing steel are a base on the regulation for the analysis and design of slabs with this kind of geometry.

Keywords : slab; damage model; design coefficients; finite elements; cracking.

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