TY - JOUR
T1 - Shear behavior of large-diameter concrete filled tube (CFT)
AU - Jung, Eun bi
AU - Lee, Seo Haeng
AU - Yoo, Jung Han
AU - Roeder, Charles
AU - Lehman, Dawn
N1 - Publisher Copyright:
© 2017, Korean Society of Steel Construction and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2017/12/1
Y1 - 2017/12/1
N2 - Circular concrete filled tube (CFT) is composite structure to fill concrete in steel tube as formwork. By combining advantage of steel tube and concrete, CFT has more superior deformation capacity and strength than reinforced concrete and steel structure, since bond stress between steel tube and concrete has influence on prevention of local buckling and increase in strength of concrete. For such a reason, CFT has been applied to as columns in buildings, and pile and drilled shaft foundations. CFT drilled shaft is designed to large diameter due to large local shear strength by seismic load, liquefaction and lateral spreading of soil layer. However, it brings uneconomical design by the conservative shear equation of current design provision. Until today, shear studies of circular CFT to improve shear equation have been rarely conducted and they are limited to small scale test. In this research, the numerical and experimental results are compared to current shear design equations, with the ultimate goal to serve as an initial analytical study that aids in planning further experimental and analytical research on shear resistance and behavior of circular CFT, which leads to improved shear design equations.
AB - Circular concrete filled tube (CFT) is composite structure to fill concrete in steel tube as formwork. By combining advantage of steel tube and concrete, CFT has more superior deformation capacity and strength than reinforced concrete and steel structure, since bond stress between steel tube and concrete has influence on prevention of local buckling and increase in strength of concrete. For such a reason, CFT has been applied to as columns in buildings, and pile and drilled shaft foundations. CFT drilled shaft is designed to large diameter due to large local shear strength by seismic load, liquefaction and lateral spreading of soil layer. However, it brings uneconomical design by the conservative shear equation of current design provision. Until today, shear studies of circular CFT to improve shear equation have been rarely conducted and they are limited to small scale test. In this research, the numerical and experimental results are compared to current shear design equations, with the ultimate goal to serve as an initial analytical study that aids in planning further experimental and analytical research on shear resistance and behavior of circular CFT, which leads to improved shear design equations.
KW - bond stress
KW - concrete filled steel tube
KW - finite element model
KW - shear strength
UR - http://www.scopus.com/inward/record.url?scp=85038832971&partnerID=8YFLogxK
U2 - 10.1007/s13296-017-1229-2
DO - 10.1007/s13296-017-1229-2
M3 - Article
AN - SCOPUS:85038832971
SN - 1598-2351
VL - 17
SP - 1651
EP - 1665
JO - International Journal of Steel Structures
JF - International Journal of Steel Structures
IS - 4
ER -