TY - JOUR
T1 - Behavior of T-shaped CFST column to steel beam connection with U-shaped diaphragm
AU - Li, Binyang
AU - Yang, Yuanlong
AU - Liu, Jiepeng
AU - Liu, Xianggang
AU - Cheng, Yu
AU - Chen, Yohchia Frank
N1 - Funding Information:
The authors are very grateful to the support provided by National Natural Science Foundation of China (Grant No. 51878098 ), Natural Science Foundation Project of CQ CSTC (Grant No. cstc2019jcyj-msxmX0580 ), Foundation of Key Laboratory of Structures Dynamic Behavior and Control ( Ministry of Education ) in Harbin Institute of Technology (Grant No. 30620180333 ), and Research on bridge construction risk and control technology under complicated environment of Sichuan-Tibet Railway (Grant No. 2019YJ036 ).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/11
Y1 - 2021/11
N2 - The connection between special-shaped concrete-filled steel tubular (CFST) column and steel beam is a particular concern to engineers. A novel U-shaped diaphragm connection is introduced in this paper to transfer the moment at beam ends in the frame with special-shaped CFST columns and steel beams. Five T-shaped CFST column to H-section steel beam connections were tested under low-cycle horizontal loading. U-shaped diaphragm was used as the connection to transfer loads from beam to joint panel zone. The experimental parameters include the size of U-shaped diaphragm and the axial load ratio of column. Based on the experimental results, the strength, ductility and strain distribution of the connections were calculated. Test results show that the connection can develop plastic bending capacity in the beam, satisfying the design code requirements of America, Great Britain, and China. Furthermore, a parametric analysis was conducted using the finite element method. The influences of U-shaped diaphragm size, tube thickness, and axial load ratio of column were analyzed. Based on the parametric analysis results, a mechanical model is proposed to calculate the yield strength and ultimate strength of U-shaped diaphragm connections. In conclusion, with a proper design, the T-shaped CFST column to H-section steel beam connection using the U-shaped diaphragm can be effectively used in practical applications.
AB - The connection between special-shaped concrete-filled steel tubular (CFST) column and steel beam is a particular concern to engineers. A novel U-shaped diaphragm connection is introduced in this paper to transfer the moment at beam ends in the frame with special-shaped CFST columns and steel beams. Five T-shaped CFST column to H-section steel beam connections were tested under low-cycle horizontal loading. U-shaped diaphragm was used as the connection to transfer loads from beam to joint panel zone. The experimental parameters include the size of U-shaped diaphragm and the axial load ratio of column. Based on the experimental results, the strength, ductility and strain distribution of the connections were calculated. Test results show that the connection can develop plastic bending capacity in the beam, satisfying the design code requirements of America, Great Britain, and China. Furthermore, a parametric analysis was conducted using the finite element method. The influences of U-shaped diaphragm size, tube thickness, and axial load ratio of column were analyzed. Based on the parametric analysis results, a mechanical model is proposed to calculate the yield strength and ultimate strength of U-shaped diaphragm connections. In conclusion, with a proper design, the T-shaped CFST column to H-section steel beam connection using the U-shaped diaphragm can be effectively used in practical applications.
UR - http://www.scopus.com/inward/record.url?scp=85105552275&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85105552275&partnerID=8YFLogxK
U2 - 10.1016/j.jobe.2021.102518
DO - 10.1016/j.jobe.2021.102518
M3 - Article
AN - SCOPUS:85105552275
SN - 2352-7102
VL - 43
JO - Journal of Building Engineering
JF - Journal of Building Engineering
M1 - 102518
ER -