Study on calculation formula of seismic shear capacity of the core of concrete frame joint strengthened by Sprayed FRP

摘要

Joints are the weak parts in the concrete frame structures, which are easy to be damaged in earthquake and cause the entire collapse of the structure. The technique of Sprayed FRP used for reinforcing concrete frame joints has many advantages, but the study is just started. The paper studied the seismic shear capacity of the core of the concrete frame joints strengthened by Sprayed FRP. Through the analysis of the mechanism of Sprayed FRP, the calculation formula of seismic shear capacity of the core of the joints strengthened by Sprayed FRP was established. The study may provide theoretical basis for further study of this new technology.