Civil Engineering and Architecture Vol. 8(5), pp. 1119 - 1126
DOI: 10.13189/cea.2020.080538
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Compressive Behaviour of Circular, Square, and Rectangular Concrete-Filled Steel Tube Stub Columns

Alireza Bahrami ^1,2,*, Ali Mahmoudi Kouhi ^2
1 Department of Building Engineering, Energy Systems, and Sustainability Science, Faculty of Engineering and Sustainable Development, University of Gävle, 801 76 Gävle, Sweden
² Department of Civil Engineering, Abadan Branch, Islamic Azad University, Abadan, Iran

ABSTRACT

In this paper, the compressive behaviour of circular, square, and rectangular concrete-filled steel tube stub (CFSTS) columns is assessed. Nonlinear three-dimensional finite element models for simulating the behaviour of the columns are developed with the aid of the finite element analysis package ABAQUS. Modelling result is compared with the experimental test result to validate the modelling. It is found that the obtained load-axial strain curves of the columns from the finite element analysis and experimental test are notably close to each other and the modelling is finally validated. Then, the analyses of the developed models of the columns are done in accordance with the validated method. Various parameters are adopted in the analyses including the load eccentricity, cross-sectional shape, and steel tube thickness. It is concluded that as the load eccentricity of the columns is increased, their ultimate load-carrying capacity, energy absorption capacity, and stiffness are decreased. Also, the circular columns have generally better performance than their rectangular and square counterparts. The hierarchy of the cross-sectional shapes of the columns from the ultimate load-carrying capacity and energy absorption capacity viewpoints is the circular, rectangular, and square shapes. Although the initial stiffness and slope of the stiffness curves of the rectangular and square columns are slightly higher than those of the circular columns, their stiffness distribution is non-uniform. Furthermore, thicker steel tube leads to greater ultimate load-carrying capacity, energy absorption capacity, and stiffness. Failure modes of the columns are achieved and discussed as well.

KEYWORDS
Concrete, Steel, Tube, Stub Column, Energy Absorption Capacity, Stiffness, Load-Carrying Capacity

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Alireza Bahrami , Ali Mahmoudi Kouhi , "Compressive Behaviour of Circular, Square, and Rectangular Concrete-Filled Steel Tube Stub Columns," Civil Engineering and Architecture, Vol. 8, No. 5, pp. 1119 - 1126, 2020. DOI: 10.13189/cea.2020.080538.

(b). APA Format:
Alireza Bahrami , Ali Mahmoudi Kouhi (2020). Compressive Behaviour of Circular, Square, and Rectangular Concrete-Filled Steel Tube Stub Columns. Civil Engineering and Architecture, 8(5), 1119 - 1126. DOI: 10.13189/cea.2020.080538.