Numerical Analysis on Square CFT Stub Columns with Binding Bars under Cyclic Loading Based on OpenSEES

Abstract:

In order to study the seismic behavior of square concrete-filled steel tubular (CFT) columns with binding bars under cyclic lateral load, numerical simulation is carried out based on the finite element software OpenSEES. The influence factors of seismic performance on square CFT columns with binding bars were studied. The results indicate that the analysis results exhibit good agreement with the experiment data. The axial load level is the main factor that influences the envelope curve. The stiffness decreases with the incresing of axial load level, while the ultimate lateral load increases with the axial load level less than 0.2, and decreases with the axial load level more than 0.3. The thickness of steel tube has a significant influence on the ultimate lateral load, while has little impact on the shape of envelope curve.

• Periodical: Applied Mechanics and Materials (Volume 711)
• Pages: 525-528
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.711.525
• Online since: December 2014
• Authors: Ying Tao Wang*, Jian Cai, Bo Zhen Zheng, Yue Ling Long
• Keywords: Binding Bars, Cyclic Loading, Numerical Analysis, OpenSEES, Square CFT Stub Column

References

[1] Cai J, He Z Q. Axial load behavior of square CFT stub column with binding bars. Journal of Constructional Steel Research, 2006, 62(5): 472-483.

DOI: 10.1016/j.jcsr.2005.09.010

[2] Cai J, Long Y L. Axial load behavior of rectangular CFT stub columns with binding bars. Advances in Structural Engineering, 2007, 10(5): 551-565.

DOI: 10.1260/136943307782417663

[3] Zuo Z L, Cai J, Yang C, et al. Axial load behavior of L-shaped CFT stub columns with binding bars. Engineering Structures, 2012, 37: 88-98.

DOI: 10.1016/j.engstruct.2011.12.042

[4] Zuo Z L, Cai J, Yang C, et al. Eccentric load behavior of L-shaped CFT stub columns with binding bars. Journal of Constructional Steel Research, 2012, 72: 105-118.

DOI: 10.1016/j.jcsr.2011.11.003

[5] Long Y L, Cai J. Stress–strain relationship of concrete confined by rectangular steel tubes with binding bars. Journal of Constructional Steel Research, 2013, 88: 1-14.

DOI: 10.1016/j.jcsr.2013.04.006

[6] Mander J B, Priestley M J N, Park R, Theoretical stress-strain model for confined concrete, Journal of Structural Engineering, ASCE, 1988, 114(8): 1804-1826.

DOI: 10.1061/(asce)0733-9445(1988)114:8(1804)

[7] Lin-hai Han. Concrete filled steel tube structure-theory and the practice, Beijing 2004. (In Chinese).