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Steel and Composite Structures
  Volume 32, Number 3, August10 2019 , pages 411-422
DOI: https://doi.org/10.12989/scs.2019.32.3.411
 


Shear behavior of short square tubed steel reinforced concrete columns with high-strength concrete
Xiang Li, Xuhong Zhou, Jiepeng Liu and Xuanding Wang

 
Abstract
    Six shear-critical square tubed steel reinforced concrete (TSRC) columns using the high-strength concrete (fcu,150 = 86.6 MPa) were tested under constant axial and lateral cyclic loads. The height-to-depth ratio of the short column specimens was specified as 2.6, and the axial load ratio and the number of shear studs on the steel shape were considered as two main parameters. The shear failure mode of short square TSRC columns was observed from the test. The steel tube with diagonal stiffener plates provided effective confinement to the concrete core, while welding shear studs on the steel section appeared not significantly enhancing the seismic behavior of short square TRSC columns. Specimens with higher axial load ratio showed higher lateral stiffness and shear strength but worse ductility. A modified ACI design method is proposed to calculate the nominal shear strength, which agrees well with the test database containing ten short square TSRC columns with shear failure mode from this study and other related literature.
 
Key Words
    tubed steel reinforced concrete (TSRC) column; square cross-section; shear studs; high-strength concrete (HSC); seismic test; shear failure mode
 
Address
(1) Xiang Li, Xuhong Zhou, Jiepeng Liu, Xuanding Wang:
School of Civil Engineering, Chongqing University, Chongqing 400045, China;
(2) Xiang Li, Xuhong Zhou, Jiepeng Liu, Xuanding Wang:
Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China.
 

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