Built-up steel columns of thin-walled elements

[engineer69]

Hi guys, does anybody have some information about thin-walled cold-formed sections for built-up steel columns? The use of thin-walled cold-formed sections for built-up steel columns, calculation features?

Normal cross-sections look like this:

normal cross-sections.png (37.96 КБ) 3679 просмотров

But I need methodology of built-up cross-sections, for example:

built-up cross-sections.png (65.45 КБ) 3679 просмотров

[Таран Д. А.]

Such profiles are used in Russia.
For calculation in Russia are no rules. You can calculate on the Eurocode.