Title: Seismic Performance of Concrete Beam-Column Joints Reinforced with Carbon Fiber-Reinforced Polymer (CFRP) Bars and Stirrups

Author(s): Ligang Qi, Guohua Cen, Chaoran Liu, Ying Zhou, Guowen Xu, Yan Yang, Zhiheng Li, and Yiqiu Lu

Publication: Symposium Paper

Volume: 360

Issue:

Appears on pages(s): 663-677

Keywords: Reinforced concrete; Beam-column joints; CFRP reinforcement; Finite element analysis; Seismic performance; Reversed cyclic loading

DOI: 10.14359/51740655

Date: 3/1/2024

Abstract:
Concrete beam-column joints are critical elements in the seismic performance of reinforced concrete (RC) structures. The use of carbon fiber-reinforced polymer (CFRP) reinforcement in these joints has gained attention due to its superior mechanical properties and corrosion resistance. This paper presents a comprehensive study of the seismic performance of CFRP-reinforced concrete beam-column joints, focusing on the development of a suitable formula for estimating the seismic shear capacity. Utilizing a finite element analysis (FEA) that was both developed and validated using pre-existing test data, a comprehensive parametric study was undertaken to explore the impact of several factors. These factors encompassed axial load, longitudinal reinforcement ratio, and transverse reinforcement ratio, and their effects on the seismic performance of CFRP-RC joints were thoroughly investigated. Eventually, a suitable formula was proposed for estimating the seismic shear capacity of CFRP-RC joints. Research results will lead in a better understanding of the seismic behavior of CFRP-reinforced concrete beam-column joints, which will consequently guide the design and analysis of CFRP-reinforced concrete structures for enhanced seismic performance.