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

Authors

  • P. C. Nguyen Faculty of Civil Engineering, Ho Chi Minh City Open University, Vietnam https://orcid.org/0000-0002-3762-4226
  • D. D. Pham Faculty of Civil Engineering, Ho Chi Minh City Open University, Vietnam
  • T. T. Tran Institute of Offshore Wind Energy, Kunsan National University, Republic of Korea
  • T. Nghia-Nguyen Faculty of Civil Engineering, Ho Chi Minh City Open University, Vietnam

Abstract

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.

Keywords:

CFST columns, axial compression, finite element modeling, stress-strain relationship, steel, concrete

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How to Cite

[1]
P. C. Nguyen, D. D. Pham, T. T. Tran, and T. Nghia-Nguyen, “Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns ”, Eng. Technol. Appl. Sci. Res., vol. 11, no. 3, pp. 7094–7099, Jun. 2021.

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