Research Of Different Reinforcement Methods To Seismic Performance Of Reinforced Concrete Structure

With the development of economy and the modification of building function, building reinforcement and retrofit plays an important role in building industry step by step.The function, application space and aesthetic of aged existing buildings don't satisfy the demand of city development and their seismic fortification standard is relatively low, so the existing buildings that they don't meet the requirements of the new standard need be reinforced or retrofitted. How to combine the retrofit and seismic reinforcement of buildings that would be reinforced or retrofitted so as to not only meet the requirements of new function but also assure the structural safe reliability and increase structural seismic capacity, is a special designing problem of structure seismic reinforcement. Simultaneously,the influence rules of different reinforces methods on the structure elastic state and plasticity seismic are also a question to be researched.The characteristics of strengthening, safe reliability, convenience of construction, economic applicability of different retrofit methods are summarized. Load capacity computation of commonly reinforcement method is introduced and its load mechanism is analyzed. Finally, this article separately uses the rigidity and the stress-strain relations carries on around the reinforcement the component equivalent, seimic performance of an existing frame structure under an action of a frequently occurred earthquake and a seldom occurred earthquake is analyzed and compared using mode decomposition response spectrum method and Time-history analysis method for used the reinforcement by encased steeland and reninfocemend by FRP. Summarized many questions which had to pay attention based on thesupporting capacity component reinforcement, Pointed out in carries on the reinforcement after the section supporting capacity insufficient component from the reinforcement structure integrity embarks to the floor rigidity and the intensity uniformity carries on the control the importance, Specially different remforcement method to structure elastic stressful condition and Elastic-Plastic earthquake resistanceperformance influence rule.This article research may provide the valuable reference for the actual reinforced concrete reinforcement retrofit project.