Seismic behavior of novel GFRP bar reinforced concrete beam-column joints internally reinforced with an FRP tube

Lin，Guan1; Zeng，Jun Jie2; Liang，Sheng Da2; Liao，Jin Jing2; Zhuge，Yan3

2022-12-15

10.1016/j.engstruct.2022.115100

ENGINEERING STRUCTURES   影响因子和分区

0141-0296

1873-7323

Due to many advantages, fiber-reinforced polymer (FRP) bars have been considered as a promising alternative to steel bars in reinforced concrete (RC) structures. The use of FRP bars in beam-column joints has been reported in the literature. However, it has been found that the energy dissipation capacity of an FRP-RC beam-column joint is dramatically lower than that of the corresponding steel-RC joint. The present study attempts to develop a novel form of FRP-RC beam-column joints with superior energy dissipation capacity. The proposed joints incorporate an internal FRP tube in the joint zone, which provides confinement to the inner concrete and shear resistance of the joint. Compared with existing reinforcement techniques using stiffeners or internal diaphragms, the proposed use of an internal FRP tube is much easier to be implemented. To demonstrate the advantages of the proposed FRP-RC beam-column joints, an experimental program consisting of 6 FRP-RC beam-column joint specimens was carried out. The effects of fiber type, thickness, and fiber orientation of the FRP tube in the joint zone were investigated. The test results in terms of failure modes, hysteretic behaviors, and energy dissipation capacities of the test specimens were discussed in detail. The test results demonstrated the efficiency of the FRP tube, especially the one with a fiber angle of ±45°, in enhancing the energy dissipation capacity of FRP-RC beam-column joints.

Beam-column joints Confinement Energy dissipation Fiber-reinforced polymer (FRP) reinforcement FRP tube Seismic performance

SCI

英语

第一

[51908137] ; [52008116] ; [T22-502/18-R] ; [2019A1515011637] ; [2021B1515020029]

Engineering

Engineering, Civil

WOS:000878101100003

ELSEVIER SCI LTD

ENGINEERING

2-s2.0-85140137079

Scopus

1.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou,510006,China
3.UniSA STEM,University of South Australia,5095,Australia

Lin，Guan,Zeng，Jun Jie,Liang，Sheng Da,et al. Seismic behavior of novel GFRP bar reinforced concrete beam-column joints internally reinforced with an FRP tube[J]. ENGINEERING STRUCTURES,2022,273.

Lin，Guan,Zeng，Jun Jie,Liang，Sheng Da,Liao，Jin Jing,&Zhuge，Yan.(2022).Seismic behavior of novel GFRP bar reinforced concrete beam-column joints internally reinforced with an FRP tube.ENGINEERING STRUCTURES,273.

Lin，Guan,et al."Seismic behavior of novel GFRP bar reinforced concrete beam-column joints internally reinforced with an FRP tube".ENGINEERING STRUCTURES 273(2022).