Quadrilateral Finite Element for Analysis of Reinforced Concrete Floor Slabs and Foundation Plates

摘要

The quadrilateral finite element for analysis of thin-walled reinforced concrete structures with complex geometrical shapes is suggested for implementation in engineering software. The behavior of concrete and reinforcement is described with relations of the deformation theory of plasticity, formulated in terms of residual strains, which allows passing from unloading to active loading for stress – strain diagram with opposite sign. The compatibility of deformations of concrete and reinforcement is assumed. Reinforcement of each direction is presented as a separate layer, subjected to tension - compression in the direction of rod axes. The Mindlin-Reissner shell theory as well as the mixed interpolation of shear strain components is used.