Examples of solving the problem of the theory of viscoelasticity by the finite element method in relation to reinforced concrete structures

Abstract

Currently, there is very little information in the Russian literature about the development and practical application of numerical methods for studying the stress-strain state of concrete and reinforced concrete structures, taking into account the creep of concrete. As a rule, when analyzing the long-term deformation of such structures, calculators use an empirical approach based on the use of the reduced deformation modulus in combination with the creep coefficient, depending on the concrete class and the relative humidity of the environment. Further calculations are implemented according to the classical scheme of the finite element method (FEM) by introducing a reduced deformation modulus corresponding to the current parameters of the tone. The purpose of this study is to verify and validate the developed finite element algorithm and the corresponding software based on the results of experimental studies of the stress-strain state of reinforced concrete structures available in the literature. The objectives of the study include assessing the accuracy of the proposed methodology for analyzing the long-term deformation of reinforced concrete structures with various methods of external force action.