TY - JOUR
T1 - Seismic performance and design method of T-shaped CFST column to U-shaped steel-concrete composite beam joint with vertical stiffeners
AU - Cheng, Yu
AU - Yang, Yuanlong
AU - Liu, Jiepeng
AU - Nie, Wanqian
AU - Frank Chen, Yohchia
N1 - Funding Information:
This research is supported by the National Natural Science Foundation of China (Grant Nos. 52178112 and 51878098), the Graduate Research and Innovation Foundation of Chongqing, China (Grant No. CYS22055), the National Natural Science Foundation of China (Grant No. 51208241), and the National Key Research and Development Program of China (Grant No. 2021YFF0500903). The authors express gratitude for their support.
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/1/15
Y1 - 2023/1/15
N2 - Special-shaped concrete-filled steel tubular (CFST) columns and cold-formed U-shaped steel–concrete composite beams (CUCB) have recently been developed for efficient steel–concrete composite construction. In this study, five half-scaled T-shaped multi-cell CFST columns to CUCB joint specimens with different vertical stiffener dimensions were designed for pseudo-static test. The seismic performance of the proposed joints was analyzed based on the failure modes, hysteresis curves, ductility, and stress distribution. The experimental results show that joints with vertical stiffeners exhibit favorable seismic performance and can be considered rigid joints in a braced frame according to Eurocode 3. A finite element (FE) model for the joint was developed using ABAQUS and verified with the available experimental results. Furthermore, a parametric study was conducted to explore the effects of the vertical stiffener dimensions on joint strength and stiffness. The numerical results indicate that the vertical stiffener dimensions can significantly enhance joint strength and stiffness. A design method of such joints was proposed for practical engineering applications, including calculation formula for joint flexural capacity as well detailing for joint stiffness.
AB - Special-shaped concrete-filled steel tubular (CFST) columns and cold-formed U-shaped steel–concrete composite beams (CUCB) have recently been developed for efficient steel–concrete composite construction. In this study, five half-scaled T-shaped multi-cell CFST columns to CUCB joint specimens with different vertical stiffener dimensions were designed for pseudo-static test. The seismic performance of the proposed joints was analyzed based on the failure modes, hysteresis curves, ductility, and stress distribution. The experimental results show that joints with vertical stiffeners exhibit favorable seismic performance and can be considered rigid joints in a braced frame according to Eurocode 3. A finite element (FE) model for the joint was developed using ABAQUS and verified with the available experimental results. Furthermore, a parametric study was conducted to explore the effects of the vertical stiffener dimensions on joint strength and stiffness. The numerical results indicate that the vertical stiffener dimensions can significantly enhance joint strength and stiffness. A design method of such joints was proposed for practical engineering applications, including calculation formula for joint flexural capacity as well detailing for joint stiffness.
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U2 - 10.1016/j.engstruct.2022.115270
DO - 10.1016/j.engstruct.2022.115270
M3 - Article
AN - SCOPUS:85141912329
SN - 0141-0296
VL - 275
JO - Engineering Structures
JF - Engineering Structures
M1 - 115270
ER -