Abstract
Elliptical concrete-filled steel tubular (CFST) column is a new form of CFST columns, consisting of an outer elliptical tube filled with concrete. Although the study on mechanical performance of the elliptical CFST members is receiving more and more attention, they have been limited to static behavior. Against this background, an experimental study on elliptical CFST columns was carried out under combined axial compression and cyclic lateral loading. The failure modes, hysteretic curves, skeleton curves, load carrying capacity, deformability, stiffness degradation, and energy dissipation ability was obtained and discussed. The test results indicated that the elliptical CFST columns possess excellent seismic performance and ductility. Valuable experimental data were provided for the formulation of the theoretical hysteresis model of the elliptical CFST columns.
Highlights
Concrete-filled steel tubular (CFST) columns have been widely used in modern construction due to their high strength, high ductility, and ease of construction [1]
To the best of the authors’ knowledge, the pseudostatic tests on 5 specimens with an aspect ratio of 2.0 conducted by Ma [23] proved the influence of concrete cube strength and axial compression ratio on the seismic behavior of elliptical CFST columns
13 elliptical CFST columns tested under combined axial compression and cyclic lateral loading, the failure mode, carrying capacity, deformation capacity, hysteretic curve, and energy dissipation capacity of the specimens are discussed in detail. e experiment results may provide the reference to the analysis and application of elliptical CFST columns in the seismic area
Summary
Concrete-filled steel tubular (CFST) columns have been widely used in modern construction due to their high strength, high ductility, and ease of construction [1]. Systematic finite element analysis [18,19,20,21,22] was performed to simulate elliptical CFST columns subjected to concentric and eccentric axial compression. These studies mainly focused on static behavior, and research on their seismic behavior is very limited, which may hamper the application of elliptical CFST members in the seismic region. To the best of the authors’ knowledge, the pseudostatic tests on 5 specimens with an aspect ratio of 2.0 conducted by Ma [23] proved the influence of concrete cube strength and axial compression ratio on the seismic behavior of elliptical CFST columns. 13 elliptical CFST columns tested under combined axial compression and cyclic lateral loading, the failure mode, carrying capacity, deformation capacity, hysteretic curve, and energy dissipation capacity of the specimens are discussed in detail. e experiment results may provide the reference to the analysis and application of elliptical CFST columns in the seismic area
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
