Open AccessInvestigations of the stress-strain state of a compressed steel concrete column using digital image correlation method
Author(s) -
A. S. Plyaskin,
А. А. Клопотов,
А. И. Потекаев,
Б. О. Кошко,
А. М. Ustinov,
О. Г. Волокитин,
И. А. Курзина,
G. I. Tayukin
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/696/1/012020
Subject(s) - materials science , deformation (meteorology) , structural engineering , digital image correlation , column (typography) , stress–strain curve , composite material , engineering , connection (principal bundle)
The results of the investigation of deformation during axial compression of a steel-concrete round column with dimensions of 1000×102 mm on the testing machine Universal Testing Machine 4500 using a digital optical system Vic-3D are presented. The patterns of the evolution of strain field distributions on the surface of the steel shell of the column are obtained. A deformation diagram indicating the transition stages of elastic strains to inelastic ones is constructed. A jump-like dependence of the Poisson’s ratio on the longitudinal relative strain of the steel concrete column during deformation of the steel concrete column is established. This phenomenon is explained under the assumption that the deformation process involves redistribution of the forces (deformations) among the components of the composite system at the stage of joint operation before separation of the steel/concrete media and operation of concrete beyond elastic strain under conditions of volumetric compression.