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Steel and Composite Structures Volume 33, Number 4, November25 2019 , pages 615-627 DOI: https://doi.org/10.12989/scs.2019.33.4.615 |
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Compressive behavior of circular hollow and concrete-filled steel tubular stub columns under atmospheric corrosion |
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Shan Gao, Zhen Peng, Xuanding Wang and Jiepeng Liu
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Abstract | ||
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 | ||
Key Words | ||
CFST; hollow steel tube; compressive behavior; stub column; simulated marine atmosphere; salt spray corrosion | ||
Address | ||
(1) Shan Gao, Zhen Peng: Shaanxi Key Laboratory of safety and durability of concrete structures, Xijing University, Xi\'an, China; (2) Shan Gao, Xuanding Wang: Postdoctoral Station of Civil Engineering, Chongqing University, Chongqing, China; (3) Jiepeng Liu: School of Civil Engineering, Chongqing University, Chongqing, China. | ||