Stability of spatial structural elements: the influence of actual modeling

The object of research is the elements of spatial metal structures – space frames and tanks. The purpose of this work is to refine the parameters of the stress-strain state of the rod elements of structural coatings and walls of vertical cylindrical tanks, which is performed when assessing their stability. Method. The actual modeling of all structural elements was chosen as the method for studying the stress-strain state. The calculation schemes are implemented in the LIRA-SAPR software package (https://www.lirasapr.com) in geometrically and physically non-linear formulations. This solution allows you to track the nonlinear work between the load-displacement relationship as much as possible. Results. As a result, for the centrally compressed rods of structural structures, a dependence has been established that makes it possible to refine their bearing capacity from the stability condition. For the walls of vertical cylindrical tanks, the question of the influence of spiral staircases on the stability of the wall was studied.