A Numerical Comparison between Spiral Transverse RC and CFST Columns under Loads of Varying Eccentricities

  • Mojtaba Labibzadeh Department of Civil Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, 61xxx Ahvaz, P. O. Box 6135713996 Iran
  • Reza Jamalpour Department of Civil Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, 61xxx Ahvaz, P. O. Box 6135713996 Iran
  • Deng H. Jing School of Civil Engineering, Southeast University, 211189 Nanjing, 2 Southeast University Road, China
  • Amin Khajehdezfuly Department of Civil Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, 61xxx Ahvaz, P. O. Box 6135713996 Iran

Abstract

This paper is the first to present the results of a numerical comparison between the performances of two newly developed concrete columns namely: multi-tied spiral transverse reinforced (MTSTR) column and concrete-filled steel tube (CFST) column under eccentric compressive loads. The behavior of MTSTR columns under eccentric loads has not been studied until today and also this behavior is not compared to that of the CFST columns. The numerical models of these columns were constructed using the nonlinear finite element method and validated against the previously published experimental data in the literature. Concrete damage plasticity model and elastic-perfect plastic model were used to simulate the behavior of concrete core and steel of the columns, respectively. This provides the capability of modeling of the nonlinear large deformations of the columns. The obtained results show that the MTSTR columns can provide greater load carrying capacity, ductility, and energy absorption with slightly lower initial stiffness than the CFST columns under the same eccentricities. For instance, the load-carrying capacity of MTSTR column is 18 percent greater than that of the CFST column when the load eccentricity is 100 mm. In case of 100 mm eccentricity, the ductility of the improved version of the MTSTR column proposed in this study is 30 percent greater than CFST one.

Keywords: multi-tied spiral transverse reinforced column, concrete-filled steel tube column, numerical analysis, eccentric load, load carrying capacity
Published online
2019-11-28
How to Cite
Labibzadeh, M., Jamalpour, R., Jing, D., & Khajehdezfuly, A. (FIRST). A Numerical Comparison between Spiral Transverse RC and CFST Columns under Loads of Varying Eccentricities. Periodica Polytechnica Civil Engineering. https://doi.org/10.3311/PPci.14177
Section
Research Article