TY - JOUR
T1 - Behavior and design of eccentrically-loaded slender tubed steel-reinforced high-strength concrete columns
AU - Li, Xiang
AU - Wang, Xuanding
AU - Liu, Jiepeng
AU - Chen, Y. Frank
N1 - Funding Information:
The authors are grateful to the support provided by National Natural Science Foundation of China (Grant No. U20A20312 ), Natural Science Foundation of Chongqing, China (Grant No. CSTB2022NSCQ-MSX1529 ), and National Natural Science Foundation of China (Grant No. 52208184 ).
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/6
Y1 - 2023/6
N2 - This study experimentally and numerically investigated the behavior of eccentrically-loaded slender circular tubed steel-reinforced concrete (CTSRC) columns filled with high-strength concrete (HSC). Six specimens with the HSC of 81.4 MPa were tested considering the length-to-diameter ratio and load eccentricity; and their effects on the failure phenomenon, bearing capacity, and ductility were evaluated. A three-dimensional finite element model was established and validated for further investigating the column behavior. The study results indicate that all specimens fail in a flexural failure mode and show good ductility; and the shear studs and circular steel tube are found to ensure the composite behavior of CTSRC columns. Besides, increasing the tube thickness contributes more to the improvement of column ductility than the load capacity and the steel shape yields before the peak load, indicating the full utilization of steel strength. Based on the parametric study, a design method considering the second-order effect and the influence of unequal load eccentricities at both column ends is proposed to assist designers to determine the load capacity of slender CTSRC columns.
AB - This study experimentally and numerically investigated the behavior of eccentrically-loaded slender circular tubed steel-reinforced concrete (CTSRC) columns filled with high-strength concrete (HSC). Six specimens with the HSC of 81.4 MPa were tested considering the length-to-diameter ratio and load eccentricity; and their effects on the failure phenomenon, bearing capacity, and ductility were evaluated. A three-dimensional finite element model was established and validated for further investigating the column behavior. The study results indicate that all specimens fail in a flexural failure mode and show good ductility; and the shear studs and circular steel tube are found to ensure the composite behavior of CTSRC columns. Besides, increasing the tube thickness contributes more to the improvement of column ductility than the load capacity and the steel shape yields before the peak load, indicating the full utilization of steel strength. Based on the parametric study, a design method considering the second-order effect and the influence of unequal load eccentricities at both column ends is proposed to assist designers to determine the load capacity of slender CTSRC columns.
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U2 - 10.1016/j.jcsr.2023.107907
DO - 10.1016/j.jcsr.2023.107907
M3 - Article
AN - SCOPUS:85150380582
SN - 0143-974X
VL - 205
JO - Journal of Constructional Steel Research
JF - Journal of Constructional Steel Research
M1 - 107907
ER -