Steel and Composite Structures

  • 제33권4호
  • /
  • Pages.615-627
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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

Compressive behavior of circular hollow and concrete-filled steel tubular stub columns under atmospheric corrosion

  • Gao, Shan (Shaanxi Key Laboratory of safety and durability of concrete structures, Xijing University) ;
  • Peng, Zhen (Shaanxi Key Laboratory of safety and durability of concrete structures, Xijing University) ;
  • Wang, Xuanding (Postdoctoral Station of Civil Engineering, Chongqing University) ;
  • Liu, Jiepeng (School of Civil Engineering, Chongqing University)
  • 투고 : 2019.07.19
  • 심사 : 2019.10.07
  • 발행 : 2019.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper aims to study the compressive behavior of circular hollow and concrete-filled steel tubular stub columns under simulated marine atmospheric corrosion. The specimens after salt spray corrosion were tested under axial compressive load. Steel grade and corrosion level were mainly considered in the study. The mechanical behavior of circular CFST specimens is compared with that of the corresponding hollow ones. Design methods for circular hollow and concrete-filled steel tubular stub columns are modified to consider the effect of marine atmospheric corrosion. The results show that linear fitting curves could be used to present the relationship between corrosion rate and the mechanical properties of steel after simulated marine atmospheric corrosion. The ultimate strength of hollow steel tubular and CFST columns decrease with the increase of corrosion rate while the ultimate displacement of those are hardly affected by corrosion rate. Increasing corrosion rate would change the failure of CFST stub column from ductile failure to brittle failure. Corrosion rate would decrease the ductility indexes of CFST columns, rather than those of hollow steel tubular columns. The confinement factor ${\xi}$ of CFST columns decreases with the increase of corrosion rate while the ratio between test value and nominal value shows an opposite trend. With considering marine atmospheric corrosion, the predicted axial strength of hollow steel tubular and CFST columns by Chinese standard agree well with the tested values while the predictions by Japanese standard seem conservative.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Shaanxi Universities, Xijing University Special Foundation

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피인용 문헌

  1. Predicting seismic performance of locally corroded steel box-section piers vol.40, pp.5, 2019, https://doi.org/10.12989/scs.2021.40.5.709