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

Mawlood, Dara A.; Rafiq, Serwan K.

doi:10.30684/etj.2022.133106.1168

	Nonlinear 3D Finite Element Model for Round Composite Columns under Various Eccentricity Loads
Engineering and Technology Journal
Article 24, Volume 40, Issue 11, 2022, Pages 1605-1614 PDF (1.11 M)
Document Type: Review Paper
DOI: 10.30684/etj.2022.133106.1168
Authors
Dara A. Mawlood^* ¹; Serwan K. Rafiq²
¹Water Resources Dept., College of Engineering, University of Sulaimani, Kurdistan Region, Iraq
²Civil Engineering, College of Engineering, University of Sulaimani, Kurdistan Rigion, Iraq
Abstract
Composite columns are often used in constructing high-rise structures because they can reduce the size of a building's columns while increasing the usable area in the floor plan. This research aimed to develop a nonlinear 3D finite element analysis model using the ABAQUS, version 6.13-4, of various round composite column designs with varied multi-skin of tubes for solid and hollow columns subjected to various eccentricity loads (90, 180 mm). Extended data to another 12 specimens of composite columns by numerical method, based on six references experimental data of composite columns. The results of ABAQUS data in this study show that; increasing eccentricity for applied loads causes a decrease in loads to fail for composed columns. The ultimate load of hollow composite sections under eccentricity is lower than solid composite sections under different eccentricity loads. Also, the same results indicated fort eccentricity loads. The same results indicated an increased number of steel layers. The stiffness of concrete is greatly influenced by its strength. When the concrete strength rises, the stiffness of the composite column rises as well. The ratios of concrete compressive strength values according to the reference column (CC1S00 with fc’=31.96 MPa) were (-4.4, 3.1, and 6.5) percent for the specimen (CC1S00) with (fc’=25, 35, and 40) MPa, respectively. The method utilized is in the nonlinear analysis, and the finite element results are in good agreement with the experimental results.
Highlights
The results of ABAQUS show that increasing eccentricity for applied loads causes the decreasing loads to fail for composed columns. The ultimate load of hollow composite sections under eccentricity is lower than solid composite sections under different eccentricity loads. Also, the same results indicated an increased number of steel layers. The increase in compressive strength of concrete enhanced the composite column’s stiffness. The finite element results are in good agreement with the experimental results.
Keywords
Eccentricity; CFSP (concrete filled steel pipe); FEM; loading; compressive strength

References
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