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With the rapid development of transport services , traffic increasing , the bridge career development is facing a severe test . Process of bridge construction in China , some problems , such as lack of cracks under torsion structure carrying capacity , the bridges disease and serious injury , and how to ensure the safety and durability of the bridge operator , is significant for the reinforcement and repair of the bridge is very important. According to the bridge reinforcement design principles and methods , describes the common method of reinforcement of the old bridge , and detailed analysis of the the bridge reinforcement three main reinforcement methods evaluation Concrete Composite reinforced carbon fiber reinforcement and external prestressing reinforcement, and pointed out that some of the issues , the key technology in the design of the bridge reinforcement reinforcement design exploration and research . This paper studies the bridge strengthening design of the three key technologies , the laminated layer of concrete reinforcement , carbon fiber reinforcement and external prestressing reinforcement technology , analyze them explore . Laminated layer of concrete reinforcement, prestressed hollow slab bridge , for example , the analysis of the bridge deck pavement on the carrying capacity of the bridge structural integrity , the stiffness of the bridge deck and structure ; design of carbon fiber reinforced prestressed concrete T-beams , for example , through simulation analysis and specification of the formula for the calculation of contrast , discusses the impact of the validity of the height of the compression zone of flexural capacity of the structure ; of external prestressing reinforcement design , continuous rigid frame bridge strengthening , for example , by analog the reinforcement design structures the stress analysis to optimize the design of external prestressing anchor end , further explore external prestressing instance in engineering research .
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