Comparative Analysis of Dynamic Characteristics of Concrete Frames Reinforced with GFRP Bars and CFRP Bars

Abstract

FRP bars have the advantages of light weight, high strength and corrosion resistance, and it can be used as a substitute for steel bars. There are relatively few studies on seismic performance of FRP reinforced concrete frame structures at home and abroad, so it is necessary to carry out research on seismic performance of FRP reinforced concrete frame structures. In order to analyze the structural performance of FRP reinforced concrete frame, the dynamic characteristics and dynamic responses of CFRP and GFRP reinforced concrete frame model structures under different seismic intensity are analyzed. The finite element model of shaking table test scale model of CFRP and GFRP reinforced concrete frame structures is established. The correctness of the finite element model is verified by comparing the structural dynamic responses of the two models. Then the acceleration response and floor displacement envelope diagram are analyzed and compared to evaluate the displacement response of the model. The results show that the displacement response of the two models under bidirectional seismic wave is obviously larger than that under unidirectional seismic wave, the displacement in X direction is obviously larger than that in Y direction, and the inter-story displacement of FRP reinforced concrete frame structure gradually increases from bottom to top. The lateral deformation of the structure is mainly the bending deformation of the beam and column.