Seismic behaviour of exterior GFRP-reinforced concrete beam-column joints.

摘要

A significant amount of research has been conducted on individual fibre reinforced polymer reinforced concrete (FRP-RC) structural elements, which have shown considerable inelasticity or deformability under monotonic and fatigue loading. However, the behaviour of FRP bars in tension-compression reversals in FRP-RC columns and frame structures has not been investigated yet. Furthermore, the elastic-linear behaviour of the non-corrodible FRP material up to failure is raising concerns on the ability to dissipate energy of frame structures in seismic loading events. Therefore, this research aims to investigate the feasibility of using glass (G) FRP reinforcement in such structural elements. Four full-scale exterior T-shaped beam-column joint prototypes are constructed and tested under simulated seismic loading conditions. The experimental results showed that the joint drift capacity can reach more than 3.0% safely without any considerable damage, which indicates the validity of using GFRP bars and stirrups as reinforcement in the beam-column joints subjected to seismic-type loading.