Steel and Composite Structures

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Behavior of concrete columns confined with both steel angles and spiral hoops under axial compression

  • Zhou, Chunheng (College of Civil Engineering and Architecture, Guangxi University) ;
  • Chen, Zongping (College of Civil Engineering and Architecture, Guangxi University) ;
  • Shi, Sheldon Q. (Department of Mechanical and Energy Engineering, University of North Texas) ;
  • Cai, Liping (Department of Mechanical and Energy Engineering, University of North Texas)
  • Received : 2017.11.29
  • Accepted : 2018.04.04
  • Published : 2018.06.25
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Abstract

This study proposed a new type of concrete column that was confined with both steel angles and spiral hoops, named angle-steel and spiral confined concrete (ASCC) column. A total of 22 ASCC stub columns were tested under axial compression to investigate their behavior. For a comparison, three angle-steel reinforced concrete (ARC) stub columns were also tested. The test results indicated that ASCC column had a superior mechanical performance. The strength, ductility and energy absorption were considerably increased due to the improvement of confinement from spiral hoops. The confinement behavior and failure mechanism of ASCC column were investigated by the analysis of failure mode, load-deformation curve and section-strain distribution. Parametric studies were carried out to examine the influences of different parameters on the axial compression behavior of ASCC columns. A calculation approach was developed to predict the ultimate load carrying capacity of ASCC columns under axial compression. It was validated that the predicted results were in well agreement with the experimental results.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Natural Science Foundation of Guangxi

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