Nonlinear 3D Finite Element Model for Round Composite Columns under Various Eccentricity Loads

Composite columns are often used in constructing high-rise structures because they can reduce the size of a building's while increasing usable area floor plan. This research aimed to develop nonlinear 3D finite element analysis model using ABAQUS, version 6.13-4, various round composite column designs with varied multi-skin tubes for solid and hollow subjected eccentricity loads (90, 180 mm). Extended data another 12 specimens by numerical method, based on six references experimental columns. The results ABAQUS this study show that; applied causes decrease fail composed ultimate load sections under is lower than different loads. Also, same indicated fort an increased number steel layers. stiffness concrete greatly influenced its strength. When strength rises, rises as well. ratios compressive values according reference (CC1S00 fc’=31.96 MPa) were (-4.4, 3.1, 6.5) percent specimen (CC1S00) (fc’=25, 35, 40) MPa, respectively. method utilized analysis, good agreement results.