Review article

In order to reduce the volume of calculations, the research of the strength and stability of concrete-filled steel tube structural members is carried out by the inverse numerical-analytical method. The limit forces are numerically assessed, according to the elastic limit state in the rod`s cross section, corresponding to the maximum permissible deformation of the most stressed fiber beyond the elastic limit. In stability problems, the limit forces are taken as deformation ones in the most loaded section, and, being combined with fictitious forces compensating for physical nonlinearity, they allow, using the inverse analytical deformation calculation of the elastic rod, to determine its the actual loading on the supports. Taking into account the practical application of this method, the solutions are constructed in dimensionless parameters, using the steel members with the calculated section parameters taken as mechanical characteristics. Comparison analysis of the obtained numeric calculation results of stability with the data obtained during the experimental studies of foreign researchers has shown a good consistency.