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Application Research of Old Bridge Reinforcement Technology in Reforming Project of Hangzhou Road Ov

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Tutor: YangJunJie
School: Ocean University of China
Course: Environmental Engineering
Keywords: old bridge reinforcement technology,prestressedcontinuous bridge,carbon fiber
CLC: U445.72
Type: Master's thesis
Year:  2013
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This thesis relies on reforming project of Hangzhou Road Overpass in Qingdao. Based on the test and inspection results of appearance, static loading, dynamic loading and free vibration characteristics of an old bridge, its structural defects and corresponding properties, position, severity level, development trend of damages and reasons for the defects and damages are analyzed. And the influence of the existing defects and damages on its quality and bearing capacity are evaluated. The reasonable and effective reinforcement measures to improve the bearing capacity and durability of the bridge are proposed on the basis of checking calculation of bridge structures.Inspection data indicate that the bearing capacity, durability and traffic capacity of the reinforced bridge have met the design requirements. The thought and method of in this thesis old bridge reinforcement technology could serve as a reference for other reinforcement projects.The main innovative results as follows:(1) Due to the complexity of finite element analyses of prestressed concrete structure, MIDAS finite element software are applied to analyze the bridge reinforcement, with the interaction between steel bars and concrete taken into consideration, which makes the model more close to reality.(2) The carbon fiber reinforcement method is a new technology in current bridge reinforcement area. The material has the advantages of high strength, light unit weight, perfect corrosion resistance and good durability. Its strength can be about10times that of common steel, while its thickness is only2mm, without significant increase in structural section or any influence in the overall appearance. This method provides a new model for bridge reinforcement.
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