Abstract
The arch bridges were used widely for the good performance under the pressure in China. It was very sensitive to some factors as temperature , settlement etc so that the arch bridges occurred the disease, carrying capacity reduction or even structure destruction etc.In the paper, based on the characteristics of masonry arch bridges, reinforcement method was analyzed, according to the situation of a masonry arch bridge, release energy method was applied to strengthening project. By comparing the stress and the strain before and after the strengthening project, some conclusions could be drawn that the bridge structure carrying capacity had been raised, the energy accumulated in the bridge structure was released, the structure safety margin was improved.
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