An efficient approach for numerical simulation of concrete-filled round-ended steel tubes. (July 2020)

• Record Type: Journal Article
• Authors: Zhang, Qiang; Fu, Lei; Xu, Lei
• Is Part Of: Journal of constructional steel research. Volume 170(2020)
• Publication Date: 2020-07
• Subjects: Concrete-filled round-ended steel tube -- Fiber beam-column model -- Finite element analysis -- Empirical model; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2020.106086
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: Concrete-filled round-ended (CFRE) steel tubes are widely used in civil infrastructures. Accurate and reliable numerical models of CFRE steel tube are significantly important to mimic the actual behavior. This study presents a fiber beam-column model to simulate nonlinear behavior of CFRE steel tubes. A group of uniaxial hysteretic constitutive models was defined for the properties of the material. To verify the reliability of the presented fiber model, a large number of numerical computations have been performed by the fiber model and a traditional refined finite element model. The results confirm that the proposed fiber model can accurately predict the nonlinear behavior of CFRE steel tubes. Finally, two empirical models for the prediction of the axial bearing capacity of CFRE steel tube columns were developed. Highlights: A fiber beam-column model is proposed. A constitutive relationship for the confined concrete was defined. Two empirical models for predicting the axial compressive resistance of CFRE steel tubes columns were established.