Numerical analysis of CFRP-confined concrete-filled stainless steel tubular stub columns under axial compression

Xu, Yuanyuan; Tang, Hongyuan; Chen, Junlong; Jia, Yigang; Liu, Ruizhong

doi:10.1016/j.jobe.2020.102130

Cited by 23 publications

(8 citation statements)

References 36 publications

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“…The tensile failure stress of CFRP is considered as 3612 MPa and the corresponding tensile failure strain is 0.016125 is used for this analytical investigation. Similar tensile failure stress and young's modulus were reported by Xu et al (2021). CFRP was chosen as the wrapped material partially/ fully, with a different number of layers of the CFPT columns.…”

Section: Carbon Fiber Reinforced Polymermentioning

confidence: 96%

Finite element and theoretical investigations on PVC–CFRP confined concrete columns under axial compression

Isleem

Jagadesh²,

Qaidi‏³

et al. 2022

Front. Mater.

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This article examines the performance of Carbon Fibre Reinforced Polymer (CFRP) on Concrete Filled with Polymer Vinyl Chloride Tube (CFPT) columns under axial compression. Firstly, 44 CFPT specimens from the literature were analyzed using ABAQUS software to understand the compressive behavior of specimens under applied displacement. Secondly, 268 CFPT specimens are simulated to understand the influence of CFRP on these control specimens with a varying number of FRP layers and wrapping depth. Other variables such as the unconfined concrete strength, the thickness of the PVC tube, and the size and slenderness ratio of the columns were also studied. Studies are extended to confinement damage plasticity model analysis of CFRP-CFPT (CCFPT) columns. Relationships between the load-carrying capacity of CCFPT columns and the CFRP properties were developed. The effect of these parameters on the CFPT leads to the development of analytical models. It is an advantage to applying a such new type of composite columns in various applications.

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Section: Carbon Fiber Reinforced Polymermentioning

confidence: 96%

Finite element and theoretical investigations on PVC–CFRP confined concrete columns under axial compression

Isleem

Jagadesh²,

Qaidi‏³

et al. 2022

Front. Mater.

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“…To analyze the ductility property of CFRP- CFDSTs, the ductility index (DI) (Wang et al, 2014; Xu et al, 2021) is used in this study, and its expression is:where δnormalu and δnormalA represent the axial shortening at the ultimate load and the axial shortening at the end of elastic stage, respectively.…”

Section: Research and Analysismentioning

confidence: 99%

“…Meanwhile, the contact between each component in the finite element part is ideal, in the actual production process of specimens, the CFRP could not completely adhere to the steel tube, which cannot be avoided and resulted in a certain gap between the steel tube and the CFRP. This gap results in separation and imperfect contact during loading, ultimately leading to lower test stiffness (Xu et al, 2021). Because the FE simulation of steel and concrete is based on homogeneous material, and the stress distribution is symmetrical, only the two ends of the outer steel tube showed local buckling in the CFDST.…”

Section: Verification Of Fe Modelingmentioning

confidence: 99%

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Analytical and experimental investigation on axial compression capacity of carbon fiber-reinforced plastic-confined concrete-filled double-skin steel tube stub columns

Tang

Qin

Hong

et al. 2023

Advances in Structural Engineering

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Concrete-filled double-skin steel tubes (CFDSTs) are widely used in civil engineering. During the service life of CFDSTs, their bearing capacity can be easily weakened by the corrosion of outer steel tubes. This study investigated the interaction mechanism and reinforcement effects of carbon fiber-reinforced plastic (CFRP)-confined CFDSTs under axial compression. Typical failure modes, axial load-shortening curves, and axial load-strain behaviors of CFDST and CFRP-confined CFDST (CFRP-CFDST) specimens were obtained. The test results showed that the ultimate bearing capacity of stub columns with concrete strength of C40 and C60 increased by 19.78% and 15.12%, respectively, when wrapped with two layers of CFRP sheets, and by 41.60% and 37.99%, respectively, when wrapped with four layers of CFRP sheets. In addition, the FE modeling of CFRP-CFDSTs was established and validated by experimental results. On this basis, the parametric analysis was conducted. To avoid local buckling and yield failure of the inner steel tubes before the outer steel tubes, a calculation formula was proposed for predicting the minimum wall thickness of the inner tube. Furthermore, the prediction formulas for the bearing capacity of CFDSTs and CFRP-CFDSTs were proposed.

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“…In the proposed FE model, the constitutive model of the GFRP confined concrete subjected to compression was acquired from GB National Standard (2020), and the fibre-reinforced composite damage model of Hashin's criteria (Hashin and Rotem, 1973;Hashin, 1980) which was depicted in ABAQUS ( 2014) was used to model the inner and outer GFRP tubes. The 8-node linear brick element with reduced integration and hourglass control (C3D8R) was used to simulate the concrete, and the 4-node shell element with reduced integration (S4R) was used to model both the GFRP tube (Xu et al, 2021). Moreover, the ABAQUS/Standard with general static analysis step was used in the computational analysis, and the iteration solution technique of Newton-Raphson method was adopted in the analysis step (ABAQUS, 2014).…”

Section: Finite Element Analysis Modelling Processmentioning

confidence: 99%

Behavior of Magnetically-Driven Concrete (MDC) Filled Double-Skin GFRP Tubes (CFDGT) Under Axial Compression

Xie

Chen

Wang

et al. 2022

Front. Built Environ.

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In order to study the axial compression behavior of magnetically-driven concrete (MDC) filled double-skin GFRP tubes (CFDGT), the axial compression test was conducted on eight columns (the length of columns ranged from 1,000 mm to 3,000 mm). For the MDC, a magnetic vibration device was established to vibrate the MDC, and two series of MDC (concrete with and without vibration) were adopted to investigate the vibration effect, research results showed that the concrete between two circular GFRP tubes could be effectively vibrated by the magnetic force. For the CFDGT columns with MDC, the load-displacement curves, load-strain curves, failure modes and ultimate loads of tested columns were obtained. After the axial compression test, a finite element model was proposed to predict the axial compression behavior and carry out parametric analysis. The design equations for the ultimate load of CFDGTs were derived from the finite element results, comparison results showed that the design equations can predict the ultimate load of CFDGT columns accurately and conservatively, and the maximum calculation error was controlled within 10%.

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Numerical analysis of CFRP-confined concrete-filled stainless steel tubular stub columns under axial compression

Cited by 23 publications

References 36 publications

Finite element and theoretical investigations on PVC–CFRP confined concrete columns under axial compression

Finite element and theoretical investigations on PVC–CFRP confined concrete columns under axial compression

Analytical and experimental investigation on axial compression capacity of carbon fiber-reinforced plastic-confined concrete-filled double-skin steel tube stub columns

Behavior of Magnetically-Driven Concrete (MDC) Filled Double-Skin GFRP Tubes (CFDGT) Under Axial Compression

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