TY - JOUR
T1 - Experimental and numerical investigations into the compressive behaviour of circular concrete-filled double-skin steel tubular columns with bolted shear studs
AU - Ayough, Pouria
AU - Ibrahim, Zainah
AU - Ramli Sulong, N. H.
AU - Ganasan, Reventheran
AU - Hamad Ghayeb, Haider
AU - Elchalakani, Mohamed
N1 - Funding Information:
The authors gratefully acknowledge the University of Malaya for providing financial support through the SATU Joint Research Program (Project No: ST005-2019) and the University of Malaya Research Grant (Faculty Program – Project No. GPF004A-2019), as well as the Ministry of Higher Education, Malaysia for providing the Fundamental Research Grant Scheme (FRGS/1/2020/TK0/UM/02/27).
Publisher Copyright:
© 2022 Institution of Structural Engineers
PY - 2022/12
Y1 - 2022/12
N2 - Eight medium-length circular concrete-filled double-skin steel tubular (CFDST) columns were examined under axial compression to evaluate the influence of bolted shear studs on the axial performance of CFDST columns. The specimens comprised six columns with bolted shear studs with longitudinal spacings of 100 mm, 75 mm, and 50 mm, and two control columns without bolted shear studs for comparison. The investigated parameters were the failure mechanisms, load-displacement curves, initial axial stiffness, compressive strength, toughness, ductility, residual strength, as well as load-strain responses. Besides, a finite element (FE) model was developed and validated against experimental results to further investigate the performance of columns. The test results demonstrated that the bolted shear studs avoided shear failure and significantly increased the ductility of the specimens. Reducing the bolted shear stud spacing reduced the intensity of local buckling in the outer tube and improved the confinement effect. Additionally, the confinement effect provided by the outer tube was remarkably improved by introducing the bolted shear studs.
AB - Eight medium-length circular concrete-filled double-skin steel tubular (CFDST) columns were examined under axial compression to evaluate the influence of bolted shear studs on the axial performance of CFDST columns. The specimens comprised six columns with bolted shear studs with longitudinal spacings of 100 mm, 75 mm, and 50 mm, and two control columns without bolted shear studs for comparison. The investigated parameters were the failure mechanisms, load-displacement curves, initial axial stiffness, compressive strength, toughness, ductility, residual strength, as well as load-strain responses. Besides, a finite element (FE) model was developed and validated against experimental results to further investigate the performance of columns. The test results demonstrated that the bolted shear studs avoided shear failure and significantly increased the ductility of the specimens. Reducing the bolted shear stud spacing reduced the intensity of local buckling in the outer tube and improved the confinement effect. Additionally, the confinement effect provided by the outer tube was remarkably improved by introducing the bolted shear studs.
KW - Axial behaviour
KW - Concrete-filled
KW - Experimental study
KW - Finite element analysis
KW - Shear stud
KW - Stiffener
UR - http://www.scopus.com/inward/record.url?scp=85141292642&partnerID=8YFLogxK
U2 - 10.1016/j.istruc.2022.10.102
DO - 10.1016/j.istruc.2022.10.102
M3 - Article
AN - SCOPUS:85141292642
SN - 2352-0124
VL - 46
SP - 880
EP - 898
JO - Structures
JF - Structures
ER -