Steel and Composite Structures

  • 제25권3호
  • /
  • Pages.375-388
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  • 2017
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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Mechanical behavior of elliptical concrete-filled steel tubular stub columns under axial loading

  • Ding, Fa-xing (School of Civil Engineering, Central South University) ;
  • Ding, Xing-zhi (School of Civil Engineering, Central South University) ;
  • Liu, Xue-mei (Schoo of Civil Engineering and Built Environment, Queensland University of Technology) ;
  • Wang, Hai-bo (School of Civil Engineering, Central South University) ;
  • Yu, Zhi-wu (School of Civil Engineering, Central South University) ;
  • Fang, Chang-jing (School of Civil Engineering, Central South University)
  • 투고 : 2017.03.24
  • 심사 : 2017.08.08
  • 발행 : 2017.10.30
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents a combined experimental, numerical, and analytical study on elliptical concrete-filled steel tubular (E-CFT) and rebar-stiffened elliptical concrete-filled steel tubular (RE-CFT) subjected to axial loading. ABAQUS was used to establish 3D finite element (FE) models for the composite columns and the FE results agreed well with the experimental results. It was found that the ultimate load-bearing capacity of RE-CFT stub columns was 20% higher than that of the E-CFT stub columns. Such improvement was attributed to the reinforcement effects from the internal rebar-stiffeners, which effectively enhanced the confinement effect on the core concrete, thereby significantly improved both the ultimate bearing capacity and the ductility of the E-CFT columns. Based on the results, equations were also established in this paper to predict the bearing capacities of E-CFT and RE-CFT stub columns under axial loading. The predicted results agreed well with both experimental and numerical results, and had much higher accuracy than other available methods.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

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피인용 문헌

  1. Behavior of an Innovative Square Composite Column Made of Four Steel Tubes at the Corners and Corrugated Steel Batten Plates on all Sides vol.2019, pp.None, 2017, https://doi.org/10.1155/2019/2971962
  2. Practical Hybrid Machine Learning Approach for Estimation of Ultimate Load of Elliptical Concrete-Filled Steel Tubular Columns under Axial Loading vol.2020, pp.None, 2017, https://doi.org/10.1155/2020/8832522