Study On Strengthening Method Of Existing Reinforced Concrete Double Curved Arch Bridge

This thesis mainly in view of the existing reinforced concrete double-curvature arch bridge reinforcement theory and strengthening methods were studied. First of all, the examination of hyperbolic arch bridge structure characteristic and the existing method of reinforcement theory, put forward the calculation model is established by using the measured arch axis, and on the internal force calculation and analysis by using finite element method. Again, depending on the type of hyperbolic arch bridge’s diseases and strengthening methods, analyzes the double-curvature arch bridge the disease type. Finally, an engineering example for both double-curvature arch bridge field exploration, general technical conditions of the whole bridge rating, and according to the finite element analysis of reinforced bridge in normal using state and bearing capacity under the limit state of the overall performance and put forward reasonable bridge reinforcement scheme, effectively prolong the service life of bridge, then the internal force analysis of structure after reinforcement and load test, the study on the feasibility of reinforcing scheme.On the basis of the above work, the thesis finally concludes that the reinforcing method for increasing cross section method is feasible, and it can be seen through the finite element model can simulate well the hyperbolic arch bridge actual situation, through internal force analysis and calculation analysis can determine bearing capacity before and after bridge reinforcement, the choice of reinforcement scheme has an important significance. Also can through the finite element model to simulate the load test, the calculated theoretical analysis data and test data, test after reinforcement structure whether meet the design requirements, assess its carrying capacity.This article adopt the finite element internal force analysis method and load test, and to provide valuable reference for future similar workers.