Structural performance of novel SCARC column under axial and eccentric loads

Chunheng Zhou, Zongping Chen, Junhua Li, Liping Cai and Zhenhua Huang

Abstract

A novel spiral confined angle-steel reinforced concrete (SCARC) column was developed in this study. A total of 16 specimens were prepared and tested (eight of them were tested under axial loading, the other eight were tested under eccentric loading). The failure processes and load-displacement relationships of specimens under axial and eccentric loads were examined, respectively. The load-carrying capacity and ductility were evaluated by parametric analysis. A calculation approach was developed to predict the axial and eccentric load-carrying capacity of these novel columns. Results showed that the spiral reinforcement provided enough confinement in SCARC columns under axial and low eccentric loads, but was not effective in that under high eccentric loads. The axial load-carrying capacity and ductility of SCARC columns were improved significantly due to the satisfactory confinement from spirals. The outer reinforcement and other construction measures were necessary for SCARC columns to prevent premature spalling of the concrete cover. The proposed calculation approach provided a reliable prediction of the load-carrying capacity of SCARC columns.

Key Words

steel reinforced concrete columns; spiral reinforcement; axial loading; eccentric loading; load-carrying capacity; ductility

Address

Chunheng Zhou and Junhua Li: School of Civil and Environmental Engineering, Ningbo University, 818 Fenghua Road, Ningbo, China Zongping Chen: College of Civil Engineering and Architecture, Guangxi University, 100 Daxue Road, Nanning, China; Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, 100 Daxue Road, Nanning, China Liping Cai and Zhenhua Huang: Department of Mechanical Engineering, University of North Texas, 3940 N. Elm St., Denton, Texas, U.S.A.

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