Bezushko D. Nonlinear models of materials at the calculation of the bent reinforce-concrete constructions by finite-element method

The work is devoted to consideration of physically nonlinear tasks of the reinforced concrete mechanics. The fundamental positions of deformed solid mechanics are used. The variant of deformation theory of plasticity is developed for the account of influence of nonlinear dependence between tensions and deformations. The algorithms for the calculation of constructions which work at the complex stress are formulated and realized. The library of multi-layered volume finite element for the modeling of reinforce-concrete slabs work is developed. In these elements the mechanical descriptions variate on layers. Such finite elements allow to take into account complex stress state and satisfy the hypothesis of direct normals. The variant of deformation theory of plasticity by concrete and reinforced concrete offered in this work is realized in a program "Concord|". The results of numeral experiments are presented on the analysis of the tense-deformed state of reinforce-concrete constructions (beam-wall, slab and reinforceв concrete beam under twisting), with the use of positions accepted in this work.