Shear Capacity of Square Concrete Filled Steel Tube Columns Based on Modified Compression Field Theory

WANG Zhen, WANG Jing-quan, LIU Tong-xu

Abstract

To accurately predict the shear capacity of square concrete filled steel tube (SCFST) columns, a theoretic model was established based on modified compression field theory. In this model, compatibility and equilibrium relationships were taken to consider the axial-flexure-shear interaction, and a general formula of shear capacity of SCFST was deduced by dissecting shear mechanism. Due to two different failure modes observed in previous tests, two different failure criterions were given respectively. The proposed model was applied to the 17 existing column specimens, which predicted well the shear capacities of the test specimens. The results show that the proposed model not only can be utilized to evaluate shear capacity of SCFST subjected to axial force, flexural moment, and shear force, but also can be employed to verdict different failure modes. The calculation results of the proposed model are credible, and the model is effective.

 

 

Keywords: concrete filled steel tube,  shear capacity,  theoretic model,  modified compression field theory,  failure mode


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References


NIE Jian-guo. QIN Kai. Research on shear performance of concrete-filled square steel tubular column connections [J]. Journal of Building Structures. 2007, 28(4): 8 — 17. (In Chinese)

HUANG Yuan, ZHU Zheng-geng, YANG Yang. et al. Seismic analysis of the square concrete-filled steel tube frame column with end ribs[J]. Journal of Hunan University: Natural Sciences, 2016, 43 (1): 89 — 96. (In Chinese)

CECS 159; 2004 Technical specification for structures with concrete-filled rectangular steel tubular members[S]. 13eijing: China Planning Press, 2004: 21 — 24. (In Chinese)

HUANG Yong, CHEN Wei-gang, DUAN Li. Experimental study on shear resistance performance of concrete filled steel tube shear block stub columns [J]. Journal of Building Structures. 2011 , 32( 12): 178-185. (In Chinese)

ТОМII М, SAKINO К. Experimental studies on concrete filled square steel tubular beam-columns subjected to monotonic shearing force and constant axial force [J]. Journal of Architecture and Planning. 1979. 281: 81— 90.

YAO Guo-huang. Research on behavior of concrete-filled steel tubes subjected to complicated loading states [D]. Fuzhou: College of Civil Engineering. Fuzhou University. 2006: 262~ 280. (In Chinese)

CHEN Yu-chao. Research on mechanical performance and design method of concrete-filled rectangular steel tube subjected to complex force [D]. Lanzhou: College of Civil Engineering. Lanzhou University of Technology. 2009: 60— 67. (In Chinese)

CAI Jian. LIANG Wei-sheng. LIN Hui. Experimental study on shear resistance performance of concrete filled square steel tubular columns [J]. Journal of Shenzhen University Science and Engineering, 2012.29(3): 189— 194. (In Chinese)

GUO Shu-li. TAO Zhong. Experimental study of square concrete-filled steel tube columns subjected to shearing [J]. Journal of Fujian University of Technology, 2012. 9(6): 550 — 554. (In Chinese)

VECCHIO F J. COLLINS M P. The modified compression-field theory for reinforced concrete elements subjected to shear [J]. AC1 Structural Journal, 1986, 83(2): 219-231.

MOSTAFAEI H. VECCHIO F J, KABEYASAWA T. Deformation capacity of reinforced concrete columns [J]. ACI Structural Journal. 2009. 106(2): 187—195.

MOSTAFAEI H. KABEYASAWA T. Axial-shear-flexure interaction approach for reinforced concrete columns [J]. ACI Structural Journal, 2007, 104(2): 218 — 226.


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