TY - JOUR
T1 - Behavior of circular CFRP-steel composite tubed high-strength concrete columns under axial compression
AU - Liu, Jiepeng
AU - Xu, Tianxiang
AU - Guo, Ying
AU - Wang, Xuanding
AU - Frank Chen, Y.
N1 - Funding Information:
The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China ( 51622802 , 51438001 ) and Fundamental Research Funds for the Central Universities (2018CDXYTM0003).
PY - 2019/3/1
Y1 - 2019/3/1
N2 - Application of high strength concrete (HSC) is an effective way to reduce the column size in high-rise and large-span structures, resulting in more available floor space. The concern on the brittleness of HSC can be alleviated by providing some confinement to it. To this end, carbon fiber reinforced polymer (CFRP) and steel tube are found to be very effective. This paper presents experimental and theoretical studies on the axial behavior of CFRP-steel composite tubed HSC columns. Totally, 25 specimens were tested to investigate the influences of CFRP layers, diameter-to-thickness ratio of steel tube, and concrete strength on the load bearing capacity and deformation behavior of such composite members. The observed failure modes, stress-strain relationships, stresses of steel tubes, and deformations of concrete are discussed. The experimental results indicate that with enough CFRP sheets the load bearing capacity and deformation behavior of core concrete are significantly improved, especially the ductility of specimens with concrete strength of 105 MPa. Calculation methods for the axial load bearing capacity of a CFRP-steel composite tubed HSC column are presented and discussed.
AB - Application of high strength concrete (HSC) is an effective way to reduce the column size in high-rise and large-span structures, resulting in more available floor space. The concern on the brittleness of HSC can be alleviated by providing some confinement to it. To this end, carbon fiber reinforced polymer (CFRP) and steel tube are found to be very effective. This paper presents experimental and theoretical studies on the axial behavior of CFRP-steel composite tubed HSC columns. Totally, 25 specimens were tested to investigate the influences of CFRP layers, diameter-to-thickness ratio of steel tube, and concrete strength on the load bearing capacity and deformation behavior of such composite members. The observed failure modes, stress-strain relationships, stresses of steel tubes, and deformations of concrete are discussed. The experimental results indicate that with enough CFRP sheets the load bearing capacity and deformation behavior of core concrete are significantly improved, especially the ductility of specimens with concrete strength of 105 MPa. Calculation methods for the axial load bearing capacity of a CFRP-steel composite tubed HSC column are presented and discussed.
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U2 - 10.1016/j.compstruct.2019.01.011
DO - 10.1016/j.compstruct.2019.01.011
M3 - Article
AN - SCOPUS:85059564589
SN - 0263-8223
VL - 211
SP - 596
EP - 609
JO - Composite Structures
JF - Composite Structures
ER -