Finite Element Modelling for Axially Loaded Concrete-Filled Steel Circular Tubes

Pham, Duc-Duy; Nguyen, Phu-Cuong

doi:10.1007/978-981-15-0802-8_8

Cited by 10 publications

(2 citation statements)

References 12 publications

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“…Almost all models are developed from experimental data based on regression analysis. Authors in [17,18] proposed FE modeling for analyzing box and circular CFST columns. Authors in [16] developed a simplified model to calculate the capacity of the cross-section and the axial force via the load-deformation ܰ − ߝ curve based on 50 test data of Self-Consolidating Concrete (SCC) filled Hollow Structural Steel (HSS) stub columns.…”

Section: Introductionmentioning

confidence: 99%

Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns

Nguyen

Pham

Tran

et al. 2021

Eng. Technol. Appl. Sci. Res.

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Predicting the behavior of concrete in a Concrete-Filled Steel Tubular (CFST) column is challenging due to the sensitivity to input parameters such as the size of the cross-section, the material modeling, and the boundary conditions. The present paper proposes a new modified finite element model to predict the behavior and strength of a CFST subjected to axial compression. The development is based on the concrete damaged plasticity model, with its stress-strain relationship revised from the available model. The predicted accuracy of the modified model is verified via a wide range of experimental tests. The proposed model has more accuracy than the available models in predicting the ultimate compression strength. The results show good agreement with the test data, allowing its use in modeling CFST columns.

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Section: Introductionmentioning

confidence: 99%

Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns

Nguyen

Pham

Tran

et al. 2021

Eng. Technol. Appl. Sci. Res.

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show abstract

“…To foster the design of CFST columns, various finite element models have been proposed, see e.g. references 3,[9][10][11][12][13] . Physically, the interaction between the concrete core and the steel skin enables the confinement effect, making the concrete behavior under compression more towards plasticity 3,10,14 .…”

Section: Introductionmentioning

confidence: 99%

Finite element modeling of tapered concrete filled steel tubular columns under axial compression

Nguyen

Nguyen²,

Bui³

2021

Sci.Tech.Dev.J.-Eng.Tech.

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Concrete filled steel tubular (CFST) column is a kind of composite structure, in which a concrete core is confined within a steel tube. Thanks to the interaction between the steel tube and the concrete core, the compressive load carrying capacity of concrete is increased. This phenomenon is usually referred to as the ``confinement effect''. Correctly modeling the confinement effect, i.e. how the confined concrete behaves under certain types of loadings, is essential in analysis and design of CFST columns. Most of the current works focus on straight columns. In this paper, a novel finite element model is developed in ABAQUS software to analyze the nonlinear behaviors of CFST columns under axial compression, which is suitable for both uniform columns (i.e. the crosssectional area is constant) and tapered columns (i.e. the cross-sectional is continuously varied with respect to the length of the column). The tapered columns are approximated as columns with piecewise constant cross sections, linearly varying from one end to the other end. Geometrically, as the number of piecewise constant cross sections increases, the model converges to the tapered column. In each segment of constant cross-sections, the material behavior of straight column is assumed. Thus, the current model is an extension to existing models for straight CFST columns. Two types of cross sections are investigated: circular shape and rectangular shape. These two cross sections are also the most popular ones in real life. Pre-processing in ABAQUS, i.e. setup of the model, is conducted via a subroutine written in Python script. The ability of the proposed numerical model in load carrying prediction is demonstrated through comparison with experimental data previously reported in the literatures by other authors.

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Improving the Accuracy of ACI 318-08 Design Standard for Predicting Strength of CFST Columns Using Machine Learning

Nguyen,

Nguyen

2023

Lecture Notes in Mechanical Engineering

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Finite Element Modelling for Axially Loaded Concrete-Filled Steel Circular Tubes

Cited by 10 publications

References 12 publications

Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns

Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns

Finite element modeling of tapered concrete filled steel tubular columns under axial compression

Improving the Accuracy of ACI 318-08 Design Standard for Predicting Strength of CFST Columns Using Machine Learning

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