Strength of concrete and composite steel and concrete structures with steel-plate reinforcement under multiaxial loading

Abstract

Modern structures of buildings made of concrete, reinforced concrete and composite steel and concrete are in a complex stress state, which leads to a change in their strength characteristics. In the case of multiaxial compression of concrete, its strength indicators increase, which can be advantageously used in calculations and design of structures. Due to the insufficient study of the issue in modern scientific, technical and regulatory literature, an experiment was conducted to study the behavior of modern, including high performance concrete in a complex multiaxial stress state. Models with steel-plate reinforcement were investigated. The assessment of the behavior of concrete in a complex multiaxial stress state is based on the results of experimental research and analysis of existing international experience. The description of the studied models is presented, the features of the materials used in the manufacture of models and their characteristics are given. Data on experimental equipment, the scheme of testing and loading structures are presented. The general types and nature of destruction, graphical test results are presented. A comparison of theoretical and experimental data is performed.