TY - JOUR
T1 - Seismic performance of concrete-encased CFST piers : experimental study
AU - Wang, Zhi-Bin
AU - Han, Lin-Hai
AU - Li, Wei
AU - Tao, Zhong
PY - 2016
Y1 - 2016
N2 - Concrete-encased concrete-filled steel tube (CFST) box members have been recently used as piers and arches in bridges owing to their high stiffness and strength. However, the seismic behavior of these members has not been thoroughly investigated, which hinders the usage of such members in earthquake-prone zones. In this study, eight concrete-encased CFST box specimens and eight RC box counterparts were tested under constant axial load along the specimen and cyclic lateral load at the mid span. The experimental parameters were the axial load level and cross-sectional type of the column. The effects of these parameters on the strength, ductility, stiffness degradation, and energy dissipation were studied. Compared with the corresponding RC box columns, the performances of concrete-encased CFST box columns, including the lateral resistance, stiffness degradation, ductility, and energy dissipation capacity, were significantly improved. A simplified calculation method was proposed to evaluate the flexural resistance of concrete-encased CFST box columns.
AB - Concrete-encased concrete-filled steel tube (CFST) box members have been recently used as piers and arches in bridges owing to their high stiffness and strength. However, the seismic behavior of these members has not been thoroughly investigated, which hinders the usage of such members in earthquake-prone zones. In this study, eight concrete-encased CFST box specimens and eight RC box counterparts were tested under constant axial load along the specimen and cyclic lateral load at the mid span. The experimental parameters were the axial load level and cross-sectional type of the column. The effects of these parameters on the strength, ductility, stiffness degradation, and energy dissipation were studied. Compared with the corresponding RC box columns, the performances of concrete-encased CFST box columns, including the lateral resistance, stiffness degradation, ductility, and energy dissipation capacity, were significantly improved. A simplified calculation method was proposed to evaluate the flexural resistance of concrete-encased CFST box columns.
KW - box columns
KW - concrete-filled tubes
KW - ductility
UR - http://handle.uws.edu.au:8081/1959.7/uws:34103
U2 - 10.1061/(ASCE)BE.1943-5592.0000841
DO - 10.1061/(ASCE)BE.1943-5592.0000841
M3 - Article
SN - 1084-0702
VL - 21
JO - Journal of Bridge Engineering
JF - Journal of Bridge Engineering
IS - 4
M1 - 4015072
ER -