Confinement coefficient of concrete-filled square stainless steel tubular stub columns

Fa-Xing Ding; Yi-xiang Yin; Liping Wang; Yujie Yu; Liang Luo; Zhi-wu Yu

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자료유형: 학술저널

저자정보: Fa-Xing Ding (Central South University) Yi-xiang Yin (Central South University) Liping Wang (Central South University) Yujie Yu (Central South University) Liang Luo (Central South University) Zhi-wu Yu (Central South University)

저널정보: 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.30 No.4

발행연도: 2019.1

수록면: 337 - 350 (14page)

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The objective of this paper is to investigate the confinement coefficient of concrete-filled square stainless steel tubular (CFSSST) stub columns under axial loading. A fine finite 3D solid element model was established, which utilized a constitutive model of stainless steel considering the strain-hardening characteristics and a triaxial plastic-damage constitutive model of concrete with features of the parameter certainty under axial compression. The finite element analysis results revealed that the increased ultimate bearing capacity of CFSSST stub columns compared with their carbon steel counterparts was mainly due to that the composite action of CFSSST stub columns is stronger than that of carbon steel counterparts. A further parametric study was carried out based on the verified model, and it was found that the stress contribution of the stainless steel tube is higher than the carbon steel tube. The stress nephogram was simplified reasonably in accordance with the limit state of core concrete and a theoretical formula was proposed to estimate the ultimate bearing capacity of square CFSSST stub columns using superposition method. The predicted results showed satisfactory agreement with both the experimental and FE results. Finally, the comparisons of the experimental and predicted results using the proposed formula and the existing codes were illustrated.

#square stainless steel tube #finite element analysis #composite action #ultimate bearing capacity #confinement coefficient

참고문헌 (29)

참고문헌 신청

2011 / ACI 318-11, Building Code Requirements for Structural Concrete and Commentary ACI Committee 318 / American Concrete Institute

2004 / CECS 159, Technical Specification for Structures with Concrete-Filled Rectangular Steel Tube Members / China Association for Engineering Construction Standardization

Chen, Z. Y. / 1992 / High-strength Concrete and Its Applications / Tsinghua University Press

Ding, F. X. / 2006 / Strength criterion for plain concrete under multiaxial stress based on damage Poisson’s ratio / Acta Mech. Solid. Sin 19(4):307~316

Ding, F. X. / 2011 / Unified calculation method and its application in determining the uniaxial mechanical properties of concrete / Front. Archit. Civil Eng. China 5(3):381

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