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Experimental and theoretical investigation of concrete-filled steel tubular x-column under axial compression
Abstract A concrete-filled steel tubular (CFST) x-column is an advanced structural member that can potentially be used in diagrid structural systems. This paper proposes a novel method for strengthening the weak part of the CFST x-column. Axial compression tests are designed and conducted on three through-type and three reinforced-type CFST x-column specimens. The load-bearing process, failure mode, and load-deformation curve of CFST x-columns are recorded during these tests and analysed in detail. The experimental results show that the stiffness of the reinforced-type x-column is greater than that of the through-type x-column, and its peak bearing capacity is approximately 1.85 times that of the through-type x-column. Moreover, better ductility performance is observed in reinforced-type x-columns. Further, a corresponding finite element model (FEM) is established to simulate the entire loading process during axial compression of CFST x-columns. A parametric study on possible parameters affecting specimen loading behaviours is also conducted. Ultimately, theoretical investigations on CFST x-columns are presented, and formulae for calculating the load-bearing capacity of through-type and reinforced-type CFST x-columns under axial compression are proposed.
Highlights A novel strengthening method for the CFST x-column was presented. Six compression tests were performed on the Through-type CFST x-column and Reinforced-type CFST x-column. Finite element analysis was conducted to study the effect of the reinforced members to CFST x-column. A theoretical unified method was developed to calculate the bearing capacity of CFST x-column under axial compression.
Experimental and theoretical investigation of concrete-filled steel tubular x-column under axial compression
Abstract A concrete-filled steel tubular (CFST) x-column is an advanced structural member that can potentially be used in diagrid structural systems. This paper proposes a novel method for strengthening the weak part of the CFST x-column. Axial compression tests are designed and conducted on three through-type and three reinforced-type CFST x-column specimens. The load-bearing process, failure mode, and load-deformation curve of CFST x-columns are recorded during these tests and analysed in detail. The experimental results show that the stiffness of the reinforced-type x-column is greater than that of the through-type x-column, and its peak bearing capacity is approximately 1.85 times that of the through-type x-column. Moreover, better ductility performance is observed in reinforced-type x-columns. Further, a corresponding finite element model (FEM) is established to simulate the entire loading process during axial compression of CFST x-columns. A parametric study on possible parameters affecting specimen loading behaviours is also conducted. Ultimately, theoretical investigations on CFST x-columns are presented, and formulae for calculating the load-bearing capacity of through-type and reinforced-type CFST x-columns under axial compression are proposed.
Highlights A novel strengthening method for the CFST x-column was presented. Six compression tests were performed on the Through-type CFST x-column and Reinforced-type CFST x-column. Finite element analysis was conducted to study the effect of the reinforced members to CFST x-column. A theoretical unified method was developed to calculate the bearing capacity of CFST x-column under axial compression.
Experimental and theoretical investigation of concrete-filled steel tubular x-column under axial compression
Chen, Dejing (Autor:in) / Zha, Xiaoxiong (Autor:in) / Xu, Peichang (Autor:in) / Zhai, Ximei (Autor:in)
03.04.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch