Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Analysis on Wet Joints in a Segmental Prestressed Concrete Girder
In a prestressed concrete girder bridge with middle or long spans, wet joints, formed by segmentally erecting, are important structural links for its main girder. To reveal the damage mechanism and improve structural design of these joints, some failures in prestressed concrete bridges in China were introduced by summarizing engineering practice and investigating related literatures, and their failure features and causes were analyzed. Then, state-of-the-art research at home and abroad about wet joints were described, including the strength of wet joints and effect of damages of wet joints on the deflection of main girder. Finally, ideas for future study were proposed. Study showed, the pouring quality of concrete, the ratio of reinforcement, and the prestressing level were interior factors for damages of these joints, while the long-term and repeated action of overloading vehicles was the exterior factor. Recently, damages of wet joints and their influences on the structural performances of main girder or the whole bridge were of increasing concern for engineers, and some preliminary achievements had been obtained. The study on the problem of wet joints could not only provide basis for failure diagnosis and bearing capacity assessment for existing bridges, but also promote reasonable design of joint configuration in newly built bridges.
Analysis on Wet Joints in a Segmental Prestressed Concrete Girder
In a prestressed concrete girder bridge with middle or long spans, wet joints, formed by segmentally erecting, are important structural links for its main girder. To reveal the damage mechanism and improve structural design of these joints, some failures in prestressed concrete bridges in China were introduced by summarizing engineering practice and investigating related literatures, and their failure features and causes were analyzed. Then, state-of-the-art research at home and abroad about wet joints were described, including the strength of wet joints and effect of damages of wet joints on the deflection of main girder. Finally, ideas for future study were proposed. Study showed, the pouring quality of concrete, the ratio of reinforcement, and the prestressing level were interior factors for damages of these joints, while the long-term and repeated action of overloading vehicles was the exterior factor. Recently, damages of wet joints and their influences on the structural performances of main girder or the whole bridge were of increasing concern for engineers, and some preliminary achievements had been obtained. The study on the problem of wet joints could not only provide basis for failure diagnosis and bearing capacity assessment for existing bridges, but also promote reasonable design of joint configuration in newly built bridges.
Analysis on Wet Joints in a Segmental Prestressed Concrete Girder
Li, Hongjiang (Autor:in)
15th COTA International Conference of Transportation Professionals ; 2015 ; Beijing, China
CICTP 2015 ; 842-853
13.07.2015
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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