Experimental and Numerical Study on Concrete-Encased Concrete-Filled Steel Tube (cecfst) Short Columns Under Axial Load with Bending Moment

The currently formulae with many coefficients are too complicated to calculate the bearing capacity of concrete-filled steel tube (CFST) short columns. In this paper, an optimal calculation method was proposed for calculating the eccentric bearing capacity of CFST short columns by means of mechanical derivation. Additionally, the calculating results are compared with experimental data. It is shown that the optimal calculating formulae are highly accurate and easily applicable in engineering design.

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Nonlinear Finite Element Analysis of Stiffened T-Shaped Thin-Walled Concrete-Filled Steel Tube Composite Columns

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.193-194.1461 ◽

2012 ◽

Vol 193-194 ◽

pp. 1461-1464

Author(s):

Bai Shou Li ◽

Ai Hua Jin

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Bearing Capacity ◽

Steel Tube ◽

Ultimate Bearing Capacity ◽

Element Analysis ◽

Concrete Filled Steel Tube ◽

Composite Columns ◽

Short Columns ◽

Thin Walled

Based on the characteristics of the special-shaped concrete-filled steel tubes and consideration of material nonlinearity of constitutive relation, stimulation of 6 T-shaped thin-walled ribbed and un-ribbed concrete-filled steel tube short columns is implemented, as well as comparable analysis of stress, strain, displacement and bearing capacity, through the finite element analysis software ANSYS. The result indicates that the rib can effectively improve the ductility, delaying the buckling occurs, which enhances the core concrete confinement effect, so as the stimulated ultimate bearing capacity which is greater than nominal ultimate bearing capacity.

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Numerical study on the performance of beam-to-concrete-filled steel tube column joint with adapter-bracket

Advances in Structural Engineering ◽

10.1177/1369433217746345 ◽

2017 ◽

Vol 21 (10) ◽

pp. 1542-1552 ◽

Cited By ~ 3

Author(s):

Shiming Chen ◽

Junming Jiang ◽

Liangjiu Jia

Keyword(s):

Finite Element ◽

Numerical Study ◽

High Strength ◽

Steel Tube ◽

Initial Stiffness ◽

Element Analysis ◽

Moment Capacity ◽

Concrete Filled Steel Tube ◽

Composite Joint ◽

Flange Thickness

An innovative beam-to-column composite joint with adapter-bracket was proposed and its behavior was investigated through finite element analysis. The special adapter-bracket is to facilitate the assembly of the steel box beam and the concrete-filled steel tube column through high-strength blind bolts. In the adapter-bracket, two endplates are welded to the beam and bolted to the column, respectively. First, two finite element models of the bolted extended endplate joint were developed in ABAQUS and validated by available experimental results. Then, based on modified models, parametric analyses were conducted to evaluate the novel joint performance, in terms of the initial stiffness, rotation capacity, moment capacity, failure mode, and joint classification. The variables included flange thickness, endplate thickness, and bolt size. Results demonstrated that the joint behavior was significantly affected by the flange thickness, the endplate-A thickness, and bolt size while slightly influenced by the endplate-B thickness. Additionally, these joints had favorable rotation and moment capacity.

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