### UDC:

539.4

### DOI:

10.23968/1999-5571-2021-18-1-36-45

### Pages:

36-45

### Annotation:

The article provides an example of practical calculation of eccentrically compressed steel tube confined concrete using a nonlinear deformation model taking into account the standard deformation diagrams of materials. The calculation was performed on the example of a test specimen made of concrete filled steel tube (steel tube confined concrete) using the method of sequential approximation based on iterative procedures. The nonlinear method is aimed at making deformation assessment of the element bearing capacity by searching for the calculated deformation at particular points of the normal section at its maximum curvature and comparison with the standard admissible values. The task of iterative calculations is assessing the value of the maximum curvature of eccentrically compressed steel tube confined concrete which is under the action of a longitudinal compressive force. The basic calculation formulas are given. Comparison with the results of numerical and analytical calculations has shown a good convergence.

Keywords: