Research On Square Concrete Columns Strengthened With Carbon Fiber Reinforced Plastics

With the rapid development of economic construction, people’s living conditionimproves constantly, many buildings can no longer meet the demands of new function, sothey need reinforcement inevitably. In addition, reckoning with the baseline period asdesigned, most of early constructions of concrete structure in China have entered the peak ofrepairing, reinforcement and transformation. Reinforced concrete columns wrapped withcarbon fiber sheet improve its compressive strength，deformation capacity and shear strengththrough restraining concrete. Domestic and foreign research institutes and universities didsome experimental research on the reinforced concrete column strengthened with carbon fibersheet, its effect has been verified effectively. As the theory of finite element analysis methodand the finite element analysis of reinforced concrete come into being, using finite elementanalysis software to simulate the entire stressing process of reinforcement of reinforcedconcrete structure analysis was achieved.This paper discuss the basic assumes of stress characteristics and the calculation ofreinforced concrete structure reinforcement, which includes reinforcement structure bearingcapacity influenced by the common work of new and old material problem, the bearingcapacity expression of reinforced concrete reinforcement structure and load-off in concretereinforcement structure, then combined reinforcement specification introduce the presentdesign regulations of reinforcement in common use, bearing capacity calculation of axispressed column and structural regulation combining with reinforcement code. After that, thispaper compare it with traditional reinforcement method to analyze, no matter in increasedvolume and weight, and construction time, and the number of people, and durability andcorrosion-resistant of construction, carbon fiber-enhanced composite material has largeadvantages.And the constraint mechanism of the stirrups which is contained in reinforcedconcrete columns is deeply analysed, introduces the domestic and foreign experts andscholars research on the chamfer, analye the chamfer influence which CFRP reinforcedconcrete column. Finally,Use ANSYS finite element software to analyze the Actual project,The simulation value respectively with the theoretical value, and the test value was comparedand analyzed, hrough the establishment of effective calculation model to verify the accuracyof the ANSYS simulation, and discuss the different factors on the influence of the reinforcement effect, strive to provide a reference for engineering application.