| The concrete struture is in the civil engineering applies the most widespredstructure. Because the material gets older, accidental damages, the environmentcorrodes and other reason as time, the studies on strengthened and retrofitting structureswere more and more concerned on the world. Fiber Reinforced Plastics (FRP) has beenwidely used in the field of strengthened structures due to its advantages such ashigh-strength, light-weight, convenient construction, high corrosion resistance. Theflexural behavior of RC simply supported girder bridge reinforced by hybrid fiberreinforced polymer was investigated in this thesis. The conclusion is as follows:（1）The flexural behavior of RC simply supported girder bridge strengthened byNSM HFRP is discussed on the basis systematic review of a great amount of literature.（2）Based on the results of RC simply Supported girder bridge strengthened byNSM hybrid fiber reinforced polymer. The following items were obseved andmearsured in the experiment: the steel strain, CFRP strain, BFRP strain and concretestrain, the shape and crack moment, cracking load, yeilding load, ultimate load of thebeams. Then the analyses of the test result were done after the experiment.（3）Based on the experiment, the formulas of flexural capacity and flexuralridgidity of simply supported beam are proposed. Then the applicability and accuracy ofthe proposed formulas are validated by comparing with the experimental results.（4）Stimulations on the process of loading all members were made by using finiteanalysis. By making comparison among simulated value and experimental value,fesibility of finite element analysis was verfied under certain conditions. |
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