The Research On The Seismic Behavior Of Reinforced Concrete Frame Structure Strengthened By FRP

In recent years, the earthquakes occurred very frequently around the world. The seismicperformance of reinforced concrete frame structure is significantly better than the other formsof structure, therefore the country build many the constructions of frame structure form in theearly stage of the founding. Currently these buildings are nearing design reference period. Inorder to make them continue to benefit society, achieve the requirement of safety anddurability, the buildings are faced with maintenance, reinforcement and reconstruction. Fibermaterials with light weight, high tensile strength, good durability, and other areas of theunique advantages are introduced into structure reinforcement, and used widely.Under seismic action beams, columns and beam-column joints of reinforced concreteframe structure are damaged more seriously. This is mainly by the strength of the beam andcolumn could not reach the requirements of seismic fortification and loss the ductility underseismic action, resulting in the destruction of the whole structure. So analyzing frame beamsand seismic performance of beam-column joints and improving their aseismic capacity is thepremise to improve the seismic performance of the whole structure. Based on basalt fiberreinforced rectangular column low weekly cycle under repeated load test results, through thetheoretical analysis, numerical analysis and comparative analysis, solid framework model fora four common nine layers analyze response under earthquake. The content of analysis mainlyincludes:In this paper, nonlinear finite element analysis is developed for the un-reinforced andbasalt fiber reinforced rectangular column. Through the study of hysteretic behavior andultimate capacity study, it is indicated basalt fiber reinforced rectangular columns can improvetheir mechanical behavior and ductility and proved using ANSYS finite element softwaresimulation basalt fiber reinforced with rectangular concrete columns is feasible. So we canreduce the pilot workload and economic investment and improve the efficiency of theanalysis.In the premise of certain BFRP, it is researched the reinforcement effect of both ends ofthe reinforcement, uniform reinforcement and Intermediate reinforcement. The analysis canconclude three kinds of reinforcement methods can improve the seismic performance ofrectangular columns, on both ends of the reinforcement is better than that of uniformreinforcement, uniform reinforcement is better than that of the central reinforcement. Theresult indicate that on both ends of the reinforcement method can not only save fiber material,also can improve the effect of reinforcement, and therefore prefer the way of reinforcement at both ends.Under the effect of earthquake, the study of nine layers frame structure in differentreinforcement scheme make us get the dynamic response characteristics, and compare withthe unreinforced framework. So we can get reinforced Angle node can obviously improve theseismic resistance of frame structure and the Angle nodes can play a bigger role on theseismic performance of frame structure. In the premise of certain BFRP, the overallstrengthening effect is obvious better than the local reinforcement effect and the overallstrengthening way plays a bigger role on the seismic performance. Reinforcement effects andsolutions in the same circumstances, the cost of BFRP significantly less than the cost of CFRP,so using BFRP more economical.