Behavior of FRP-Confined Concrete-Filled Steel Tube Columns

Polymers

Yiyan Lu²  Na Li¹ 

[1] School of Civil Engineering, Wuhan University, Wuhan 430072, China;

关键词: concrete-filled steel tube (CFST) columns;    fiber-reinforced polymer (FRP);    axial load;    confinement;    load capacity;   

DOI  :  10.3390/polym6051333

来源: mdpi

【 摘 要 】

This paper presents the results of an experimental study into the behavior of concrete-filled steel tube columns confined by fiber-reinforced polymer (FRP). Eleven columns were tested to investigate the effects of the FRP layer number, the thickness of the steel tube and concrete strength on their load capacity and axial deformation capacity. The experimental results indicated that the FRP wrap can effectively confine the concrete expansion and delay the local buckling of the steel tube. Both the load capacity and the axial deformation capacity of concrete-filled steel tube columns can be substantially enhanced with FRP confinement. A model is proposed to predict the load capacity of the FRP-confined concrete-filled steel tube columns. The predicted results are generally in good agreement with the experimental ones obtained in this study and in the literature.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.