Behaviour of SFRC Filled Steel Tube Columns Under Axial Load

Güler, Soner; Lale, Erol; Aydoğan, Metin

doi:10.18057/ijasc.2013.9.1.2

Cited by 6 publications

(6 citation statements)

References 13 publications

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“…This research investigates the effects grade of concrete on the CFT column's behaviour. Due to do this, the data reported by Soher Guler et al [18] was used for evaluating ABAQUS model. For creating ABAQUS models, tie is used to paste the steel tube to concrete core according to the proposal of composite material; moreover, a nonlinear dynamic analysis and pushover are applied.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, the results of FEM analyses were compared with experimental test. In the following, after evaluating ABAQUS model and identifying the concrete grade (C20, C30, C40 & C50), with using some experimental references [18,19], the relationship between the compressive strength, tensile strength & the Young's modulus was estimated for concrete core. Ultimately, Concrete core for each column was built in ABAQUS and concrete material was assigned to them.…”

Section: Methodsmentioning

confidence: 99%

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Numerical Study on the Effect of Concrete Grade on the CFT Circular Column’s Behavior under Axial Load

Badarloo

Jafari

2019

Civ Eng J

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Concrete-filled tubular (CFT) column improves the structure properties under different load pattern, so that it should be designed under two main load patterns (static and cyclic load) using current design method such as Finite Element Method (FEM) and analytical method (guideline equation). In this research, a CFT column with specific dimensions is modeled by using ABAQUS finite element software; the target of this study is to conduct a pushover analysis and also a hysteresis analysis under cyclic loading. Then, the concrete grade and percentage of column reinforcement were altered using the FEM, and eventually, compared with the results of analytical equations to measure the safety level of analytical equations. For this purpose, the CFT columns with C20, 30, 40 & 50 concrete cores were modeled with and without reinforcement, and the effect of concrete grade on the capacity of column was studied. In addition, MATLAB software was used to obtain beta index and load capacity design for the CFT column. The results demonstrated that the columns designed in accordance with the AISC have a good performance under the cyclic and static loading. The safety level of design equations ranged between 3 and 5, and the columns could resist higher loads (about 2.5-3.5 times) through the design by ABAQUS.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Numerical Study on the Effect of Concrete Grade on the CFT Circular Column’s Behavior under Axial Load

Badarloo

Jafari

2019

Civ Eng J

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“…It shows that most of the SSSTCs exhibit ring-shaped bulge at one or two ends of SSSTCs, namely elephant foot local buckling. This prevalent type of failure mode commonly took place in tubular columns under compression [34][35][36], which have low imperfections. For several specimens with t=6 mm tested at -30~-80℃, inelastic inward and outward local buckling occurred as shown in Fig.…”

Section: Failure Modesmentioning

confidence: 99%

Low-Temperature Compression Behaviour of Circular Stub Stainless-Steel Tubular Columns

2022

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This paper firstly studies mechanical properties of stainless steel (SS) S30408 at the low temperature (T) range of -80~20℃. Further compression tests are carried out on 20 SS stub tubular columns (SSSTCs) at low temperatures of -80, -60, -30, and 20℃ to investigate their low-temperature compression behaviour. Including the testing low temperatures, the wall thickness of SS tube (t) is the other investigated parameters. Test results show that decreasing the T from 20 to -80℃ improves the yield and ultimate strength of stainless steel by 29% and 80%, respectively, but reduces its ductility by about 25%. Under low-temperature compression, elephant foot local buckling occurs to most of SSSTCs and inelastic inward and outward local buckling occurred to specimens with 6 mm-thick SS tube. Test results also show that the decreasing T value increases the strength and stiffness of SSSTCs, but compromises their ductility; the wall thickness of SSSTCs significantly improves their strength, stiffness, and ductility. This paper also develops 3D finite element model (FEM) to estimate the low-temperature compression behaviour of SSSTCs, which considers nonlinearities of material and geometry, geometric imperfections, and influences of low temperatures. The validations show it predicts reasonably well the low-temperature compression behaviours of SSSTCs.

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“…To minimize the increased cost due to the addition of steel fibers, the design program was developed and applied into practice for the circular-sectional SFRCFST column [48]. With the cubic compressive strengths of SFRC from 32.4 to 57.8 MPa and the volume fraction of steel fiber from 0.75% to 1.25%, the lateral cyclic loading behavior of circular-sectional SFRCFST columns were investigated [49,50,51,52]. The results pointed out that the ductility, compressive rigidity, and energy absorption capacity of the columns could be improved by the presence of steel fibers, and the minimum volume fraction of steel fiber was 0.75% to get the sufficient ductility.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Rectangular-Sectional Steel Tubular Columns Filled with High-Strength Steel Fiber Reinforced Concrete Under Axial Compression

Liu

Ding

et al. 2019

Materials

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This paper studies the effect of high-strength steel fiber reinforced concrete (SFRC) on the axial compression behavior of rectangular-sectional SFRC-filled steel tube columns. The purpose is to improve the integrated bearing capacity of these composite columns. Nine rectangular-sectional SFRC-filled steel tube columns and one normal concrete-filled steel tube column were designed and tested under axial loading to failure. The compressive strength of concrete, the volume fraction of steel fiber, the type of internal longitudinal stiffener and the spacing of circular holes in perfobond rib were considered as the main parameters. The failure modes, axial load-deformation curves, energy dissipation capacity, axial bearing capacity, and ductility index are presented. The results identified that steel fiber delayed the local buckling of steel tube and increased the ductility and energy dissipation capacity of the columns when the volume fraction of steel fiber was not less than 0.8%. The longitudinal internal stiffening ribs and their type changed the failure modes of the local buckling of steel tube, and perfobond ribs increased the ductility and energy dissipation capacity to some degree. The compressive strength of SFRC failed to change the failure modes, but had a significant impact on the energy dissipation capacity, bearing capacity, and ductility. The predictive formulas for the bearing capacity and ductility index of rectangular-sectional SFRC-filled steel tube columns are proposed to be used in engineering practice.

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Behaviour of SFRC Filled Steel Tube Columns Under Axial Load

Cited by 6 publications

References 13 publications

Numerical Study on the Effect of Concrete Grade on the CFT Circular Column’s Behavior under Axial Load

Numerical Study on the Effect of Concrete Grade on the CFT Circular Column’s Behavior under Axial Load

Low-Temperature Compression Behaviour of Circular Stub Stainless-Steel Tubular Columns

Behavior of Rectangular-Sectional Steel Tubular Columns Filled with High-Strength Steel Fiber Reinforced Concrete Under Axial Compression

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