Finite element modelling of rectangular concrete-filled steel tube stub columns incorporating high strength and ultra-high strength materials under concentric axial compression

  • Thai Son Faculty of Civil Engineering, University of Technology, Vietnam National University Ho Chi Minh City, 268 Ly Thuong Kiet street, District 10, Ho Chi Minh City, Vietnam
  • Cuong Ngo-Huu Faculty of Civil Engineering, University of Technology, Vietnam National University Ho Chi Minh City, 268 Ly Thuong Kiet street, District 10, Ho Chi Minh City, Vietnam
  • Dinh Van Thuat Faculty of Building and Industrial Construction, Hanoi University of Civil Engineering, 55 Giai Phong road, Hai Ba Trung district, Hanoi, Vietnam
Keywords: concrete-filled steel tube columns, stub columns, axial compression, finite element analysis, high strength materials

Abstract

This study presents a unified approach to simulate the behavior of rectangular concrete-filled steel stub columns incorporating high strength and ultra-high strength materials subjected to concentric axial compression. The finite element model is developed based on Abaqus software, which is capable of accounting for geometrical nonlinearity, material plasticity, and interaction between multi-physics. The proposed model incorporates the influences of residual stress for welded-box steel sections and initial imperfection. A novel stress-strain relation of confined concrete is proposed to account for the composite action, which might increase the strength and ductility of infilled concrete under multi-axial compressive conditions. Various verification examples are conducted with wide ranges of geometrical and material properties. The simulation results show that the proposed model can accurately predict the ultimate strength, load-deformation relations, and failure mode of the experimental specimens.

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Published
31-10-2021
How to Cite
Son, T., Ngo-Huu, C., & Thuat, D. V. (2021). Finite element modelling of rectangular concrete-filled steel tube stub columns incorporating high strength and ultra-high strength materials under concentric axial compression. Journal of Science and Technology in Civil Engineering (STCE) - HUCE, 15(4), 74-87. https://doi.org/10.31814/stce.huce(nuce)2021-15(4)-07
Section
Research Papers