Material Properties Models for Analysis of Cold-Formed Steel Members

Abdel-Rahman, Nabil; Sivakumaran, K.S.

doi:10.1061/(asce)0733-9445(1997)123:9(1135)

Cited by 197 publications

(56 citation statements)

References 4 publications

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“…In this paper, the plastic damage constitutive model of concrete [11] is used to simulate the finite element method. The elastic modulus of concrete were calculated by E c = 4730√ (MPa) [12]. The Poisson ratio in the elastic phase is 0.2.…”

Section: Constitutive Relation Model Of Concretementioning

confidence: 99%

Finite element analysis of mechanical behavior of concrete-filled square steel tube short columns with inner I-shaped CFRP profiles subjected to bi-axial eccentric load

Zhan

Yang

et al. 2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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The concrete-filed square steel tube with inner I-shaped CFRP profiles short columns under bi-axial eccentric load were investigated by the finite element analysis software ABAQUS. The working mechanism of the composite columns which is under bi-axial eccentric load are investigated by using the stress distribution diagram of steel tube concrete and the Ishaped CFRP profiles. In this paper, the main parameters; eccentric ratio, steel ratio, steel yield strength, concrete compressive strength and CFRP distribution rate of the specimens were investigated to know the mechanical behavior of them. The interaction between the steel tube and the concrete interface at different characteristic points of the composite columns were analyzed. The results showed that the ultimate bearing capacity of the concrete-filed square steel tube with inner I-shaped CFRP profiles short columns under biaxial eccentric load decrease with the increase of eccentric ratio, the ultimate bearing capacity of the composite columns increase with the increase of steel ratio, steel yield strength, concrete compressive strength and CFRP distribution rate. The contact pressure between the steel tube and the concrete decreased from the corner zone to the flat zone, and the contact pressure decreased from the mid-height cross section to other sections.

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Section: Constitutive Relation Model Of Concretementioning

confidence: 99%

Finite element analysis of mechanical behavior of concrete-filled square steel tube short columns with inner I-shaped CFRP profiles subjected to bi-axial eccentric load

Zhan

Yang

et al. 2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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“…Cold-formed steel tube was applied in the test, and steel tube section is divided into two zones: a corner zone and a flat zone, as shown in Figure 5. Abdel-Rahaman and Sivakumaran [16] presented the constitutive equation, which was applied to plate area of square tube, as following Eq. 1 shown.…”

Section: Analysis Of Stress Distribution Of Cfrpmentioning

confidence: 99%

“…1 shown. According to the study of Karren and Winter [17] and Abdel-Rahman and Sivakumaran [16], following Eq. 2 is applied to calculate yield strength f y of the corner area of square tube.…”

Section: Analysis Of Stress Distribution Of Cfrpmentioning

confidence: 99%

Behavior of High Strength CFSST Stub Columns With Inner CFRP Tube Under Axial Compressive Load

Lang²,

Yang³

2011

Volume 7 Number 3

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ABSTRACT:The contribution of CFRP (carbon fiber-reinforced polymer) to concrete-filled square steel tube (CFSST) is considered in this paper. Based on the experimental study of six high strength concrete-filled square steel tubular stub columns with inner CFRP circular tube (HCFSST-CFRP), the finite element software ABAQUS is employed to analyze the mechanical behaviors of HCFSST-CFRP stub column under axial compression load. Mechanism of interactions among steel tube, concrete core (includes two parts: innermost concrete and sandwich concrete) and CFRP is analyzed, and a simplified equation of loads shared by innermost concrete and sandwich concrete is given by regression analysis. Longitudinal stress distribution in the concrete section, load shared coefficient and axial load-strain relationships are presented. The confinement effect of the CFRP tube increases ductility of HCFSST stub columns remarkably. Innermost concrete suffers most of axial load after specimen reaching ultimate bearing capacity because of the confinement effect of CFRP tube. CFRP tube begins to work obviously at the descent stage after stub column reached ultimate bearing capacity.

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“…The steel's stress-strain relationship was shown by entering corresponding steel stress and strain point. As cold-formed steel tube was used in the test and the steel stress-strain relationship referred to four-line model suggested by Abdel-Rahman and Sivakumaran, in this analysis, the material was divided into corner area and flat area (Abdel-Rabman N [16]). The stress-strain curve is described with the following equations: Where f y is the yield strength of flat area; E s is Young's modulus of elasticity, E s1 , E s2 ,E s3 is Slope of line，E s1 =0.…”

Section: Materials Properties and Constitutive Modelsmentioning

confidence: 99%

Experimental Behavior of High Strength Concrete-Filled Square Steel Tube Under Bi-Axial Eccentric Loading

Li¹,

Yang²,

Lang³

2010

Volume 6 Number 4

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An experimental investigation on the behaviour of square steel tube columns filled with high-strength concrete in this study was done. A total of six high strength concrete-filled square steel tube (HCFST) columns subjected to bi-axial eccentric loading were constructed and tested. The primary test parameters were the slenderness ratios (varied from 13.9 to 27.7)，steel ratios(7% and 13%), and eccentricity along major axis was 71mm. The test results demonstrate the influence of these parameters on the strength and behavior of concrete-filled square steel tube columns. As what shows in the experiment, the steel ratio is an important factor which influences the bearing capacity of the specimens, and the stable bearing capacity of the specimens decreased rapidly with the increasing slenderness ratio. The specimens failed to work out of instability. Proper material constitutive models for HCFST columns are applied and verified by the nonlinear finite element software ABAQUS against experimental data. A comparison of experimental failure loads with the predicted failure loads in accordance with the method described in the reference showed good agreement.

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Material Properties Models for Analysis of Cold-Formed Steel Members

Cited by 197 publications

References 4 publications

Finite element analysis of mechanical behavior of concrete-filled square steel tube short columns with inner I-shaped CFRP profiles subjected to bi-axial eccentric load

Finite element analysis of mechanical behavior of concrete-filled square steel tube short columns with inner I-shaped CFRP profiles subjected to bi-axial eccentric load

Behavior of High Strength CFSST Stub Columns With Inner CFRP Tube Under Axial Compressive Load

Experimental Behavior of High Strength Concrete-Filled Square Steel Tube Under Bi-Axial Eccentric Loading

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