Application of the deformation theory relations for the description of concrete deformations under complex multiaxial loading modes
V. I. Korsun, A. V. Niedoriezov
Donbas National Academy of Civil Engineering and Architecture
Annotation: The results of comparative calculations of concrete strains by the most developed deformation theory for the cases of simple and complex modes of one-, two- and triaxial loading are presented. The basic ratios for the modified version plasticity deformation theory for concrete [4] developed in DonNACA are given. Concrete is presented by the model of an orthotropic solid, orthotropic properties of which are caused by directed development of structure micro fractures, which appear as the effects of compressibility and dilatation. The paper discusses the results of experimental studies in conditions of proportional and non-proportional two- and triaxial compression. Conformity of agreement between the calculated values and the experimental one has been performed. It is shown that the ratio of the concrete plasticity strains theory and its modified version, in general, can be used for the description of concrete deformation under various programs of a complex (non-proportional) two- and triaxial increasing loading without unloading. The modified version of concrete plasticity deformation theory based on the shear rupture fracture model of concrete structure was founded the most promising for further development. The orthotropic model further development require special experiments for the quantitative assessment of deformation components which are caused by the micro fracture processes in the concrete structure.
Keywords: concrete, the volumetric stress state, compressibility, dilation, deformation theory, loading modes, stress, strains, strength.
Pages: 175-185.
Link for citation: Korsun, V. I.; Niedoriezov, A. V. Application of the deformation theory relations for the description of concrete deformations under complex multiaxial loading modes. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2013. – Vol. 9, N 3. – Р. 175-185. – URL: https://donnasa.ru/publish_house/journals/spgs/2013-3/06_Korsun_Nedorezov.pdf (date of access: 19.09.2024). (in Russian)
Vol. 9, N 3 (2013)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture