Accounting Different Kinds of Nonlinearities at Numerical Simulation of Earth Sheltered Structures

Гуслиста, Г. Е. Урахування різних видів нелінійностей при комп’ютерному моделюванні заглиблених споруд / Г. Е. Гуслиста, М. В. Савицький // Теоретичні основи будівництва. - 2007. – № 15. – С. 225 – 230.UK: Стаття присвячена розгляду різних видів нелінійностей при комп'ютерному моделюванні заглиблених споруд.RU: Статья посвящена рассмотрению различных видов нелинейностей при компьютерном моделировании заглубленных сооружений.EN: The article is devoted to consideration of soil and reinforced concrete physical nonlinearity, structural nonlinearity and genetic nonlinearity at numerical simulation of earth sheltered structures. Nonlinear properties of soil are taken into account by means of soil finite elements (FE) which work according to Coulomb's law. It is possible to define nonlinear laws of material deformation ( - ) both for concrete and for reinforcing steel. There are laws of deformation for different grades of reinforced concrete. Structural nonlinearity means taking into account the contact interaction between the structure and the soil massif by using a special 2-node FE of one-way elastic spring between nodes (spring that takes either tension or compression). Genetic nonlinearity means the simulation of erection process of the earth sheltered structures. The results of investigations are evidence of necessity to take into account these nonlinearities