TY - JOUR
T1 - Comparative study of stirrup-confined circular concrete-filled steel tubular stub columns under axial loading
AU - Ding, Fa xing
AU - Zhu, Jiang
AU - Cheng, Shan Shan
AU - Liu, Xuemei
PY - 2018/2
Y1 - 2018/2
N2 - © 2017 Elsevier Ltd This paper presents a comparative study of circular concrete-filled steel tubular stub columns with three different stirrup confinement types: bidirectional stirrups, loop stirrups and orthogonal stirrups. Axial compression tests have been carried out aiming at investigating the effects of the stirrup form and volume-stirrup ratio on the mechanical behavior of the stirrup-confined circular CFT stub columns, and ABAQUS was used to carry out the 3D numerical modelling. Radial stress of the core concrete and the composite action among the steel tube, stirrups and the core concrete have been investigated. It is found that the confinement provided by stirrups on core concrete strongly outperforms that provided by steel tube, steel sections or steel reinforcement. Furthermore, a simplified approach was developed to predict the ultimate bearing capacity of stirrup-confined circular CFT stub columns, which agreed well with the experimental and numerical results.
AB - © 2017 Elsevier Ltd This paper presents a comparative study of circular concrete-filled steel tubular stub columns with three different stirrup confinement types: bidirectional stirrups, loop stirrups and orthogonal stirrups. Axial compression tests have been carried out aiming at investigating the effects of the stirrup form and volume-stirrup ratio on the mechanical behavior of the stirrup-confined circular CFT stub columns, and ABAQUS was used to carry out the 3D numerical modelling. Radial stress of the core concrete and the composite action among the steel tube, stirrups and the core concrete have been investigated. It is found that the confinement provided by stirrups on core concrete strongly outperforms that provided by steel tube, steel sections or steel reinforcement. Furthermore, a simplified approach was developed to predict the ultimate bearing capacity of stirrup-confined circular CFT stub columns, which agreed well with the experimental and numerical results.
UR - https://pearl.plymouth.ac.uk/context/secam-research/article/2058/viewcontent/2017_20TWStruct.pdf
U2 - 10.1016/j.tws.2017.11.033
DO - 10.1016/j.tws.2017.11.033
M3 - Article
SN - 0263-8231
VL - 123
SP - 294
EP - 304
JO - Thin-Walled Structures
JF - Thin-Walled Structures
IS - 0
ER -