Steel and Composite Structures

  • 제23권4호
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  • Pages.483-491
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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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DOI QR코드

DOI QR Code

Experimental study on concrete-encased composite columns with separate steel sections

  • Xiao, Congzhen (China Academy of Building Research) ;
  • Deng, Fei (Department of Civil Engineering, Tsinghua University) ;
  • Chen, Tao (China Academy of Building Research) ;
  • Zhao, Zuozhou (Department of Civil Engineering, Tsinghua University)
  • 투고 : 2015.11.19
  • 심사 : 2017.01.22
  • 발행 : 2017.03.20
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents an experimental study on the behavior of concrete-encased composite columns with multiseparate steel sections subjected to axial and eccentric loads. Six 1/4-scaled concrete-encased composite columns were tested under static loads. The specimens were identical in geometric dimensions and configurations, and the parameter of this experiment was the eccentricity ratio of the applied load. Each two of the specimens were loaded with 0, 10%, and 15% eccentricity ratios. The capacity, deformation pattern, and failure mode of the specimens were carefully examined. Test results indicate that full composite action between the concrete and the steel sections can be realized even though the steel sections do not connect with one another. The concrete-encased composite columns can develop stable behavior and sufficient deformation capacity by providing enough transverse reinforcing bars. Capacities of the specimens were evaluated based on both the Plain Section Assumption (PSA) method and the superimposition method. Results show that U.S. and Chinese codes can be accurate and safe in terms of bending capacities. Test results also indicate that the ACI 318 and Mirza methods give the best predictions on the flexural stiffness of this kind of composite columns.

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과제정보

연구 과제 주관 기관 : ArcelorMittal

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피인용 문헌

  1. Experimental study on the static performance of steel reinforced concrete columns with high encased steel ratios vol.27, pp.15, 2018, https://doi.org/10.1002/tal.1536
  2. Theoretical Stress–Strain Model for Concrete in Steel-Reinforced Concrete Columns vol.145, pp.4, 2019, https://doi.org/10.1061/(ASCE)ST.1943-541X.0002289
  3. Behavior of concrete columns confined with both steel angles and spiral hoops under axial compression vol.27, pp.6, 2018, https://doi.org/10.12989/scs.2018.27.6.747
  4. Experimental investigation on shear capacity of partially prefabricated steel reinforced concrete columns vol.28, pp.1, 2018, https://doi.org/10.12989/scs.2018.28.1.073