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Experimental and theoretical study on concrete-filled T-shaped steel tubular columns under uniaxial eccentric compression
Highlights Full-scale test on slender CFTST beam-columns under eccentric load. Equivalent confinement factor to overall quantify the confinement effect in CFTSTs. Fiber element model for CFTSTs. Effects of cross-section dimensions, material properties, slenderness and loading angle on CFTST behavior. Theoretical model predicting the interaction curves of CFTST beam-columns.
Abstract This paper presents an experimental and theoretical study on concrete-filled T-shape steel tubular (CFTST) beam-columns. Four full-scale slender beam-columns with slenderness ratio of 33.7–39.1 were tested under uniaxial eccentric compressive loads. In addition, three stub columns with the same cross-sections were axially compressed to investigate the confinement effect. Failure mode, axial displacement, lateral deflection, axial strain and hoop strain were obtained to understand the structural behavior of CFTST beam-columns. For beam-columns bended about the symmetric axis, torsion was not observed but a slight rotation of the neutral axis that was no longer parallel to the centroid axis was found by analyzing the experimental results. A fiber element model for CFTST beam-columns was developed and verified for parametrical analysis. The effects of key parameters, such as material properties, cross-section dimensions, loading angle and slenderness ratio, on the behavior of stub and slender beam-columns were investigated. Finally, theoretical models were proposed to estimate the interaction curve and the load-carrying capacity of CFTST beam-columns. The prediction matches well with the experimental results.
Experimental and theoretical study on concrete-filled T-shaped steel tubular columns under uniaxial eccentric compression
Highlights Full-scale test on slender CFTST beam-columns under eccentric load. Equivalent confinement factor to overall quantify the confinement effect in CFTSTs. Fiber element model for CFTSTs. Effects of cross-section dimensions, material properties, slenderness and loading angle on CFTST behavior. Theoretical model predicting the interaction curves of CFTST beam-columns.
Abstract This paper presents an experimental and theoretical study on concrete-filled T-shape steel tubular (CFTST) beam-columns. Four full-scale slender beam-columns with slenderness ratio of 33.7–39.1 were tested under uniaxial eccentric compressive loads. In addition, three stub columns with the same cross-sections were axially compressed to investigate the confinement effect. Failure mode, axial displacement, lateral deflection, axial strain and hoop strain were obtained to understand the structural behavior of CFTST beam-columns. For beam-columns bended about the symmetric axis, torsion was not observed but a slight rotation of the neutral axis that was no longer parallel to the centroid axis was found by analyzing the experimental results. A fiber element model for CFTST beam-columns was developed and verified for parametrical analysis. The effects of key parameters, such as material properties, cross-section dimensions, loading angle and slenderness ratio, on the behavior of stub and slender beam-columns were investigated. Finally, theoretical models were proposed to estimate the interaction curve and the load-carrying capacity of CFTST beam-columns. The prediction matches well with the experimental results.
Experimental and theoretical study on concrete-filled T-shaped steel tubular columns under uniaxial eccentric compression
Lei, Min (Autor:in) / Li, Yuan-Qi (Autor:in) / Luo, Jin-Hui (Autor:in) / Li, Ying-Lei (Autor:in) / Wang, Peng (Autor:in)
Engineering Structures ; 265
06.06.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Concrete-filled tubular steel columns under eccentric loading
| Engineering Index Backfile | 1969
Behaviour of concrete filled steel tubular (CFST) stub columns under eccentric partial compression
| Online Contents | 2011