| With the continuous development of society and economy, the need of transportation is growing. Because of functional degradation, a large number of bridges are difficult to meet the need of transportation development, which limits the development of our society and economy. The bridge reinforcement gradually becomes an important part of the traffic construction and has important practical significance. Due to the characteristics of simple, convenient installation, low cost, and low building height, in our country prestressed hollow slab beam bridges, as one of the most popular bridge types in service, are widely applied in bridge engineering. With the increase of engineering practice and theory, there are many kinds of strengthening methods applied in the prestressed hollow slab beam bridges, including enlarged cross section method, pasting steel plate reinforced method, external prestressed strengthening method, transverse prestressing reinforcement method, changing structural system reinforcement method, etc. These strengthening methods have different features, but also have limitations. In recent years, the engineering reinforcement technique based on polymer materials are rising, and they will be applied widely. This thesis intends to study on this aspect, and the main research contents are as follows:1. Summarize the HTRCS’s mixing method, the basic mechanical properties, the composite structure after toughening and the application of beam reinforcement.2. Use the strip method and the finite element method to analyze the service performance of reinforced beam.3. Conduct full-scale static load test on 20 m prestressed reinforcement beam.The results show that the reinforcement beam body is in the elastic state before cracking. With the increase of load, the strain of concrete at the bottom of the reinforced beam reached the ultimate tensile strain of concrete material firstly, and cracks. Subsequently, the HTRCS’s strain also reached its ultimate tensile strain, and cracks. |
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