Feasibility Study on Sprayed FRP Used in the Seismic Strengthening of Concrete Frame Joints

Abstract

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. FRP pasted on the surface to strengthen frame joints have a good effect in experiments, but the pasted FRP can not effectively constrain the core area of the joints and will increase the difficulty of construction when using in actual engineering. The paper studied the feasibility of Sprayed FRP used to reinforce concrete frame joints, the advantages and mechanism of Sprayed FRP were analyzed. The study may provide the basis for the popularization and application of this new technology in actual engineering.

Analysis on the Seismic Performance of RC Frame Beam-Column Joints Strengthened by Sprayed FRP

“…Spray operation was conducted using special equipment to mix chopped fibers and resin system and applied onto the concrete surface. In recent years, the technique of using Sprayed FRP for reinforcing structures has been paid more and more attention to for its advantages of good integrity, simple construction, unaffected by shapes, strength evenly [3][4].…”