Review article

The inverse solution method for strength and buckling resistance problems allows establishing the stress state and the corresponding integral forces, such as axial force and bending moments for an arbitrarily specified strain state in the cross-section of a rod element, taking into account physical nonlinearity, local and distortional buckling. In order to determine the strain state parameters corresponding to the given relations of forces, there have been developed fast-acting methods that take into accountthe operation features of steel structural elements. The solution of a system of two nonlinear equations is reduced to the solution of an equation with one unknown, which makes it possible to use numerical methods that guarantee convergence of iterative process.