Investigation of stress-strain state of reinforced concrete arch with a view of viscoelasticity on the basis of different theories of creep

Abstract

Investigation of stress-strain state of reinforced concrete arch with a view of viscoelasticity on the basis of different theories of creep

Mailyan L.R., Denisov O.V., Chepurnenko A.S., Avakov A.A.

Incoming article date: 18.11.2015

We investigated the creep of concrete arches based on the following theories: the theory of linear creep by Harutyunyan-Maslov, kinetic theory, the theory of flow, theory of aging, and nonlinear theory of Y. Gurieva. We considered viscoelastic model of the concrete, ie total strain was represented as the sum of elastic strain and creep strain. Solution of the problem was carried out by finite element method. We considered the arch rigidly clamped at the ends and loaded with a uniformly distributed load. Graphs of growth of deflection and stress distribution in the reinforcement and concrete are represented. We obtained the substantial redistribution of stress between the reinforcement and the concrete during creep: in reinforcement stresses increased and in concrete stresses decreased. The strongest redistribution occurs on the theory Y. Gureva.

Keywords: reinforced concrete arch, creep theory of heredity, aging theory, the theory of flow, kinetic theory, finite element method, stress-strain state