Failure mechanism of full-size concrete filled steel circle and square tubes under uniaxial compression

Cai, Jingming; Pan, Jinlong; Shan, Qifeng

doi:10.1007/s11431-015-5890-4

Cited by 11 publications

(6 citation statements)

References 14 publications

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“…The elastic modulus in the plastic-reinforced stage can be approximated to 0.01E s (E s is the elastic modulus of the steel tube). Cai et al [40] established the equivalent constitutive uniaxial compression relation of core concrete which is restricted by a square steel tube. This constitutive model not only has a clear mechanical expression but also can describe the change in ultimate strength and peak strain for core concrete under axial compression as increasing the constraint effect.…”

Section: Constitutive Relation Of the Materialsmentioning

confidence: 99%

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The Axial Compression Behavior of Basalt Fiber-Reinforced Recycled Aggregate Concrete-Filled Circular Steel-Tubular Column

Zhang,

Luo,

Wang

et al. 2023

Sustainability

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Recycled aggregate concrete (RAC) technology has received a lot of attention as a green environmental protection technology. However, the unsatisfactory mechanical behavior of RAC restricts its application in engineering practice. The structure of basalt fiber-recycled aggregate concrete-filled circular steel tubes (C-BFRACFST) can dually improve the mechanical behavior of RAC. To observe the axial compression behavior of the C-BFRACFST column, seven specimens were designed with recycled aggregate replacement ratio (0%, 50%, 100%), basalt fiber (BF) content (0 kg/m3, 2 kg/m3, 4 kg/m3) and length–diameter (L/D, 5, 8, 11) as variable parameters for axial compression tests. The failure mode, load–displacement/strain curve, axial compression deformation, ultimate bearing capacity, energy dissipation, and ductility of specimens have been analyzed. The derived constitutive relation of core basalt fiber-reinforced recycled aggregate concrete (BFRAC) constrained by the circular steel tube and the 3D finite element model of C-BFRACFST column have been established to simulate the whole process of compression. It is observed that instability or shear failure occurs in specimens under axial compression load. When the recycled aggregate replacement ratio was increased from 50% to 100%, the change in the energy-dissipation capacity of the specimens was not significant but the ultimate bearing capacity and displacement ductility coefficient decreased by 3.45% and 8.91%, respectively. When the BF content was increased from 2 kg/m3 to 4kg/m3, the change in the ultimate bearing capacity of specimens was not significant; the energy-dissipation capacity at the later stage of bearing increased, and the displacement ductility coefficient was noted to increase by 13.34%. When the L/D was increased from 8 to 11, the energy-dissipation capacity of specimens was decreased, and the ultimate bearing capacity and displacement ductility coefficient declined by 1.37% and 43.52%, respectively. The finite element simulation results are in agreement with the test results.

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Section: Constitutive Relation Of the Materialsmentioning

confidence: 99%

“…Cai et al [40] provided a technique for calculating a square steel tube's horizontal effective compression stress. Based on this, a technique for calculating a circular steel tube's horizontal effective compression stress is derived in this study.…”

Section: Determination Of Effective Horizontal Compression Stress Of ...mentioning

confidence: 99%

The Axial Compression Behavior of Basalt Fiber-Reinforced Recycled Aggregate Concrete-Filled Circular Steel-Tubular Column

Zhang,

Luo,

Wang

et al. 2023

Sustainability

View full text Add to dashboard Cite

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“…Bending failure occurred when the weld strength of the casing was greater than the limit of the axial compression load, whereas when the weld strength was less than the limit of the applied load, the failure became open splitting of the steel casing. Authors in [6] studied the mechanism of CFST failure with circular and square cross sections. The full scale of CFST columns under the effect of uniaxial compression load was considered.…”

Section: Introductionmentioning

confidence: 99%

Behavior and Strength of Composite Columns under the Impact of Uniaxial Compression Loading

Hassooni

Zaidee²

2022

Eng. Technol. Appl. Sci. Res.

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The Concrete Filled Steel Tube Column (CFST) is classified as a composite structural element. This type of column was adopted as the main loaded member in many buildings due to its excellent mechanical properties. CFST columns have high strength and ductility behavior, and they can sustain heavy loads with high performance. These led to their adoption in many countries. In the current study, the behavior and strength of CFST columns under the effect of axial compression load with parameters such as the diameter to thickness ratio and the height to diameter ratio were investigated. Strength carrying capacity and axial and lateral deformations with axial and lateral strains were explored. The test results showed that smaller heights within the same material gave higher strength capacity. The stiffness of the CFST is more than concrete and hollow steel section specimens' due to its capability of high strength capacity with low displacement. Also, the composite action of CFST gave more stiffness.

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“…In the concrete-filled square steel tube, the constraint of the corner zone is bigger than the constraint in the flat zone. However, the concrete-filled square steel tube is much easier to be manufactured and constructed than the concrete-filled circular steel tube, so concretefilled square steel tube is much more widely applied in the practical engineering [2]. Up until now, a large number of scholars have studied the concrete-filled steel tube.…”

Section: Introductionmentioning

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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Failure mechanism of full-size concrete filled steel circle and square tubes under uniaxial compression

Cited by 11 publications

References 14 publications

The Axial Compression Behavior of Basalt Fiber-Reinforced Recycled Aggregate Concrete-Filled Circular Steel-Tubular Column

The Axial Compression Behavior of Basalt Fiber-Reinforced Recycled Aggregate Concrete-Filled Circular Steel-Tubular Column

Behavior and Strength of Composite Columns under the Impact of Uniaxial Compression Loading

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

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