Critical and postcritical behavior of thin-walled multicell column of open profile

In the paper thin–walled isotropic and orthotropic multicell columns with open cross– section are consisdered. The local buckling and load carrying capacity analysis of these type columns under uniform compression was performed. Columns built of square shape cells with equal thickness of all walls and constant cross–section area were analyzed. The width of walls depends on the number of cells present in a column. The obtained results – it is the cell number and cross–section shape influence on the buckling load and load carrying capacity, are presented in the form of graphs and tables. The relatively high increase of local buckling stress value is demonstrated as well as the decrease of relationship between the load carrying capacity and buckling load – both events connected with increase of cell number.