Abstract
A new technique for nonlinear analysis of reinforced concrete (RC) slabs under various loading programs is developed. The technique is based on nonlinear finite element (FE) analysis of a grid representing the slab. An original formulation for the representative grid allows a good quality of the representation for the most coarse mesh of the grid axes. A refined non-linear FE model of a RC frame under complex loading was used. The model is based on a new modification of spatial anisotropic beam finite element and refined constitutive models of concrete and steel-in-concrete under complex loading history. The developed simplified method is capable of predicting nonlinear behavior up to the failure for various RC slabs subjected to monotonic and complex loading (including unloading and reloading branches).
Published Version
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