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Failure Modes and Construction checklist for Prestressed I-beam Bridges
Using automation equipment to build concrete bridge or powerful-span steel bridge has become the 1st choice of bridge constructing method in recent years.
However, the local governments are limited by the financial resources and the scale of basic level constructions. They always use precast and prestressed girder bridges as the 1st choice. Among them I-girder constructing method is the most popular. Firstly, it is because this method has been used since years long past. The past constructing practice can provide us with many experiences for reference. Secondly, it is because the doorsill is not high (the conditions as a qualified constructer is not strict). The C grade constructer already possesses the constructing ability. Therefore, most of the public works units of basic level adopt this method.
At the beginning this essay will make a brief introduction and conclusion on several construction methods which are often used. Then, it selects the upper structure of the precast and prestressed I-grider bridge as well as the constructing work for study. In connection with easy damage and the key points of causing problems during construction, this essay will discuss it further, and sum up the causes of the problems and their countermeasures. A self-inspection list which suits the constructing flow path will be made, and provided to the executives as a reference when they use this constructing method for work. Besides, the structural destruction mode when the work is completed under this constructing method is will be discussed. From the possible structural destruction mode, a theory will be inferred. The best sectional structure will be searched as a reference for sectional design.
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