In vitro evaluation of the behavior Skhtknndh sheet steel columns filled with concrete CFST

Steel columns filled with concrete composite columns are kind of CFST Due to the many benefits compared to RC columns and steel Have their use, especially in tall buildings in the years Recently has found a large spread. In this research work sheets Skhtknndh The overall basis or in critical areas) where the maximum stresses (Inside the walled steel columns are boiling, in the lab are check. This column reviews in 10 samples of about 3:1 scale made Are tested. Aznmvnhha are without number plates Skhtknndh And the number plates Skhtknndh entire column and in several other Skhtknndh sheets in the critical area column is placed. Samples Tested under axial compressive load times coupled with intermittent side Afzayshyabndh Columns are placed to complete demolition and treatment curves of samples Have been drawn and are being investigated. In terms of the cross-section, three The circle, square and octagonal are considered. There sheets Skhtknndh in critical areas to improve the behavior of column column in cycles Are side loading and increase the column ductility.