Research on Restoring Force Model of High Strength Concrete-Filled Steel Tubular Columns

Abstract:

Based on the experimental results of twenty three high strength concrete-filled square steel tubular (HCFT) columns subjected to cyclic lateral load, the restoring force model of square HCFT columns is established. Through theoretical analysis and experimental results, the main parameters of the restoring force model which are axial load ratio, confinement effect coefficient as well as slenderness ratio are discussed. The theoretical method is put forward. The results show that the relation of elastic stiffness to degraded stiffness, the relation of ultimate bearing capacity to yielding loads are proportional with confinement effect coefficient, and inversely with axial load ratio as well as slenderness ratio. Many various influential factors are considered in the restoring force model of square HCFT columns. The model is close to the experimental results which can be conveniently applied for nonlinear dynamics analysis of composite structures.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 1746-1751
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.1746
• Online since: May 2012
• Authors: Kai Ze Ma
• Keywords: Axial Load Ratios, Confinement Effect Coefficient, High Strength Concrete-Filled Rectangular Steel Tubular Columns, Restoring Force Model, Slenderness Ratio

References

[1] Amit H.V., and Richard J.M. (2004). Seismic Behavior and Design of High-strength Square Concrete-filled Steel Tube Beam Columns. Journal of Structural Engineering (ASCE), 13:2,169-179.

DOI: 10.1061/(asce)0733-9445(2004)130:2(169)

[2] Eurocode 4. (1994). Design of Composite Steel and Concrete Structure-PartⅠ: General Rules and for Buildings.

[3] Han L.H. (2007). Theory and Practice of Concrete-Filled Steel Tubular Structure, Science Press, Beijing, China. (In Chinese)

[4] Han L.H., and Tao Z. (2000). Ductility Coefficient of Concrete Filled Steel Tubular Columns with Square Sections. Earthquake Engineering and Engineering Vibration, 20:4, 56-65. (In Chinese)

[5] Li X.P., Lu X.L., et al. (2007). Seismic Behavior of CFRT Columns under Cyclic Loading. Earthquake Engineering and Engineering Vibration, 25:5, 95-103. (In Chinese)

[6] Ma K.Z. (2008). Study on Seismic Behaviors of High Strength Concrete-filled Rectangular Steel Tube Columns, Master Dissertation, Inner Mongolia Scientific and Technical University. (In Chinese)

[7] Sun X.L., Liang S.T., et al. (2007) Research on Skeleton Curves of Concrete-filled Steel Tubular Frame Structure. Earthquake Engineering and Engineering Vibration, 27:1, 99-103. (In Chinese)

[8] Tu Y.Q. (1994). Research on the Characteristics of Restoring Force for Concrete-filled Steel Tube Compression-bending Members, PhD Dissertation, Harbin Building University. (In Chinese)

[9] You J.T. (2002). Study for Dynamical Behaviors of Concrete Filled Rectangular Steel Tubes, PhD Dissertation, Fu Zhou University, 17-40. (in Chinese)

[10] Zhang S.M., Liu J.P., et al. (2005). Hysteretic Behavior of Biaxial Loaded High Strength Concrete-filled Square Hollow Section Beam-column. Journal of Building Structures, 26:3, 9-18. (In Chinese)