Seismic Responses Analysis And Isolation Research Of Prestressed Concrete Curved Box-girders Bridge

Along with the social economic and development of city construction, urbanviaducts and interchange constructions are increasing a lot. In order to meet theelevated linear demand or function requirement, curved box-girders bridges, asnecessary means which realize the direction of traffic connections, are used moreand more widely. But there is still a lot of work to do to understand the seismicresponse specialty of prestressed concreted curved box-girders bridges, theapplication of isolation bearing in prestressed concreted curved box-girders bridges,which has the important practical significance for the curved bridge anti-seismicdesign. Effects of traveling wave is a very important influence factors which shouldnot be neglected in seismic analysis of big span structure. For multi-spanprestressed concrete curved box-girders bridges are widely used in urban viaductand interchange construction, if we do not consider the effects of traveling wave,the seismic checking can not be satisfied. This paper mainly choose arepresentative and practical interchange project, by using large-scale structuralanalysis program MIDAS/Civil, finite element model is built against theparticularity of prestressed curved box-girders bridge, In order to study thedynamic seismic response、effects of traveling wave and the relevant factors, tosummarize some rules for the design and construction of the prestressed curvedbox-girders Bridges.The main contents of this paper are as following:Prestressed curvedbox-girders bridge application situation investigation.Building hydrodynamicmodel of prestressed curved box-girders bridge、 selecting seismic wave andanalyzing vibrationmode.Effects of traveling wave on seismic responses ofprestressed curved box-girders bridge.The influences of curvature radius and pierheight on the dynamic seismic response of prestressed curved box-girders bridges.Seismic isolation analysis of prestressed curved box-girders bridges.By analyzing, especially in the earthquake-prone area, when designing thecurved beam bridge, we should consider various factors, and some vibratingisolation measures should be taken, to effectively reduce the seismic responses ofcurved beam bridges and extend the service time.