Abstract:
In the theory of resistance of reinforced concrete structures it is required to be able to predict and describe the behavior of structures under various conditions and at any time during its existence.
Assessment of the stress strain state of the construction must be considered taking into account the random effects of natural and manmade disasters, such as earthquake, flooding, freezing, fire, and others. In this broader sense, this problem can not be solved by methods of linear structural mechanics, as two principles (Hooke's law and the principle of small displacements), laid in its foundation, limit its capabilities. The principle of small displacement is not acceptable under certain loads, and Hooke's law, beginning with a certain level of stress for all materials is no longer maintained and replaced by a nonlinear dependence between stress and strain. It follows that for a careful calculation of the design strength it should be abandon the principles of linear theory and apply more broad and complex justifications of nonlinear theory. In this work the solution to the problem of calculation of inelastic reinforced concrete beams throughout the entire phase of work, from loading until structural failure is introduced. The calculation takes into account sufficiently strict physical and geometric nonlinearity and cracks in the tension zone of concrete.
