Deformation Dependences of the Power and Environmental Resistance of Reinforced Concrete Structures Under Accidental Actions

• Published in: IOP conference series. Materials Science and Engineering 2021-03, Vol.1079 (4), p.42035
• Main Authors: Kolchunov, V I, Androsova, N B
• Format: Article
• Language: English
• Subjects: Algorithms; Concrete; Concrete structures; Deformation; Dynamic loads; Environmental impact; Mathematical models; Parameters; Reinforced concrete; Rheological properties
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/1079/4/042035

The problem of determining the parameters of the stress-strain state of reinforced concrete bending elements with the simultaneous manifestation of force loading and environmental impact under static-dynamic loading conditions is considered. Dependences of the deformation model were constructed using the integral modulus of deformations by V M Bondarenko. The parameters of the diagrams of the static-dynamic deformation of the section of corroded concrete under the action of a static and short-term dynamic load are determined on the basis of a rheological two-element model of concrete deformation of the theory of plasticity by G A Genieva. At the same time, the hypothesis was accepted that the relationship between stresses and strains in corrosion damaged concrete under its short-term loading is affinity-like to similar dependencies of undamaged concrete, and the ultimate deformations of concrete under static and static-dynamic loading modes are equal to each other. A methodology and an algorithm for the computational analysis of the strength and environmental resistance of reinforced concrete structures at all stages of static-dynamic deformation are proposed.