Steel and Composite Structures

  • 제31권3호
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  • Pages.291-301
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  • 2019
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Mechanical behaviors of concrete-filled rectangular steel tubular under pure torsion

  • Ding, Fa-xing (School of Civil Engineering, Central South University) ;
  • Sheng, Shi-jing (School of Civil Engineering, Central South University) ;
  • Yu, Yu-jie (School of Civil Engineering, Central South University) ;
  • Yu, Zhi-wu (School of Civil Engineering, Central South University)
  • 투고 : 2018.11.02
  • 심사 : 2019.04.05
  • 발행 : 2019.05.10
⟨ 이전 논문 다음 논문 ⟩

초록

Pure torsion loading conditions were not frequently occurred in practical engineering, but the torsional researches were important since it's the basis of mechanical property researches under complex loading. Then a 3D finite element model with precise material constitutive models was established, and the effectiveness was verified with test data. Parametric studies with varying factors as steel yield strength, concrete strength and sectional height-width ratio, were performed. Internal stress state and the interaction effect between encased steel tube and the core concrete were analyzed. Results indicated that due to the confinement effect between steel tube and core concrete, the torsional strength of CFT columns was greatly improved comparing to plain concrete columns. The steel ratio would greatly influence the torque share between the steel tube and the core concrete. Then the torsional strength calculation formulas for core concrete and the whole CFT column were proposed. The proposed formula could be simpler and easier to use with guaranteed accuracy. Related design codes were more conservative than the proposed formula, but the proposed formula presented more satisfactory agreement with experimental results.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Hunan Province Preeminence Youth Fund

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피인용 문헌

  1. Numerical Study of Circular Concrete Filled Steel Tubes Subjected to Pure Torsion vol.11, pp.9, 2019, https://doi.org/10.3390/buildings11090397
  2. Torsional behaviour of concrete-filled circular steel tubular members under coupled compression and torsion vol.34, 2019, https://doi.org/10.1016/j.istruc.2021.08.026
  3. Confinement Effect and Efficiency of Concentrically Loaded RACFCST Stub Columns vol.15, pp.1, 2019, https://doi.org/10.3390/ma15010154