Noncompact and slender concrete-filled steel tubes under axial compression: Finite-element modeling and evaluation of stress-strain models for fiber-based analysis

Subedi, Naresh; Obara, Taku; Kôno, Susumu

doi:10.1016/j.jcsr.2022.107353

Cited by 4 publications

(2 citation statements)

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“…These columns are expected to develop a cross-section's full plastic strength capacity without failing due to buckling. According to the Japanese standard AIJ [20], CFST columns are classified as short columns when the length-to-outer column diameter ratio is less than or equal to four (L/D < 4) and this boundary is commonly used among researchers for the classification [9].…”

Section: Numerical Modelling Of Short Cfst Columnsmentioning

confidence: 99%

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Numerical modelling of concrete-filled steel tubular short columns under axial compression

Nikolić¹,

Kostić²,

Stošić³

2023

Građ materijali i konstrukcije

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The paper presents three-dimensional numerical models of short concrete-filled steel tubular circular columns that can successfully describe the column behaviour under axial compression. Several of the most commonly used material models for the steel part and a concrete portion of the column are evaluated in the models. In addition, the paper presents a new proposal for the extension of the Eurocode 2 stress-strain relation to make it suitable for describing the complex behaviour of concrete inside the steel tube. This model overcomes the current limitations of the Eurocode 2 design guide, referring to the limitation for the concrete curve in compression to 3.5‰ strain. The ultimate axial column strength obtained by the proposed model is compared to the ultimate column capacity calculated by a simplified method provided in Eurocode 4. All presented numerical models are validated on a set of experiments from the literature and demonstrate good agreement. The comments about the accuracy of each model are provided, along with the identified limitations.

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Section: Numerical Modelling Of Short Cfst Columnsmentioning

confidence: 99%

“…Figures 10-19 show the axial load-axial strain (Ne)shortening (N -A) relations, they are converted by dividing relations for specimens from Table2. Diagrams contain axial shortening A with the column initial length L to obtain results obtained numerically using presented FE Models 1-4(Ne) relations[9],[13]. compared to the results obtained from experiments.…”

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confidence: 99%