Introduction of students with causes and consequences of nelinear concrete behaviour. Introduction of students with possible nonlinear models and methods for solving nonlinear problems in concrete.

Training of students to learn to choose appropriate nonlinear models and methods for solving nonlinear problems ini concrete. Training of students to learn to conduct nonlinear statical analysis of concrete structures. 

Types of nonlinearities and clasification. Incremental-iterative procedures of solution. Iterative methods of Newton-Raphson type and method of linear and constant stiffnes. Incremental methods. Material non- linearity. Modelling of elasto-plastic behaviour of concrete and reinforcement. Von-Mises, Mohr-Coloumb and modified Mohr-Coloumb failure criteria in more dimensional state of stress. Modelling of concrete in tension. Brittle cracking and tension-softening relations. Discrete and smeared cracks. Shear-retention relations. Contact problems (agreggate inter lock, bond). Examples.