Abstract
A substantial amount of work was carried out on the use of fiber-reinforced polymer (FRP) in reinforcing concrete structural elements, which demonstrated considerable inelasticity or deformity through monotonous and fatigue loads. Even so, the action of FRP bars in FRP-RC columns and frame structures has not yet been studied during reversed cyclic loading. In this research, reversed cyclic loading was conducted on three beam-column joint models using the finite element method with ANSYS software. The first model was for a joint designed with steel rebar for both the longitudinal reinforcement and stirrups. Glass fiber reinforced polymer (GFRP) rebar was used to reinforced the second joint model for both longitudinal reinforcement and steel stirrups, and the third joint model was designed with hybrid steel/GFRP reinforcement for the longitudinal reinforcement and steel stirrups. The performance of the three models under reversed cyclic loading, such as load vs. story drift and energy dissipation capacity, were compared. The GFRP-reinforced model displayed a predominantly elastic activity up to failure. Although its energy dissipation was weak, its performance in terms of total storey drift demand was satisfactory.
Highlights
The primary reason for the collapse of the reinforced concrete (RC) buildings is steel corrosion, which requires multimillion annual maintenance costs worldwide
El-Salakawy [21] analyzed the external shear strength of the RC beam-column joint with Glass fiber reinforced polymer (GFRP) reinforcement, and the results indicated that the overall joint shear stress must be reduced to avoid joint damage [21]
This research was conducted to investigate the performance of beam-column reinforced joints using hybrid steel/GFRP and GFRP reinforcement in longitudinal reinforcement bars and steel stirrups and compared them to conventional steel-reinforced joints under cyclic reversed load
Summary
The primary reason for the collapse of the reinforced concrete (RC) buildings is steel corrosion, which requires multimillion annual maintenance costs worldwide. GFRP; Hybrid reinforcement; Cyclic loading; Beam-column joint; Frames. Most research works were conducted on the concrete beam behavior and column structures with FRP rebar reinforcement.
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