| Summary: | The main tasks of optimizing metal structures is reducing their materials consumption, time of production and erection. This is achieved by using thin-walled frame structures. Cold-formed profiles are some of them. The volume of such structures application in modern construction is constantly growing. At the same time it is necessary to note, that in Russia there is no regulatory base for design of structures made of cold formed profiles, because the actual operation of such constructions differs from the operation of constructions made of hot-rolled profiles. Buckling greatly influences the operation of frame structures made of cold-formed profiles. The problem connected with the resistance of compressed-bent shanks with variable inflexibility hinge-supported at the ends is under consideration. The way to calculate the critical load at which buckling of a shank happens was found out. This task solution will help to develop the normative base for designing made of cold-formed profiles.
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