"Flexural performance of circular concrete-filled double steel tubular " by Junchang Ci, Mizan Ahmed et al.
This paper presents experimental and numerical investigations on circular concrete-filled double steel tubular (CFDST) members under flexural load. Seven specimens including five CFDST specimens were tested and the test parameters included the effects of concrete compressive strength, the thickness of the steel tubes, and the diameter ratio on their flexural performance. The final failure modes, moment (M)-curvature (ϕ) curves, deflection curves of specimens, and distributions of section longitudinal strains were analyzed and reported in this study. A nonlinear finite element model (FEM) was ...