Review article

The object of research in this work is the stability of the core elements of steel structures. The inverse numerical-analytical method is used to solve this problem It is based on an elastic model of the element, supplemented by equivalent loading by fictitious forces that take into account the physical nonlinearity of the material, local damage in the form of a cutout, as generalized, to which metal corrosion can be reduced, causing loss of local stability, local destruction of the plates that make up the core element. Using the example of calculating an I-beam column-type element, it has been found that the effect of damage that violates the symmetry of the section depends on the area of weakening and its location relative to the vector of acting forces. Thus, when the shelf is weakened by 1.9-13.0 % of the total cross-sectional area, stability decreases by 2.4-37.0 %, respectively. In this case, the decrease is several times greater than the attenuation area. The location of the attenuation in a less stressed area has practically no significant effect.