Design and Study on Oblique River Crossing of Urban Viaduct
The urban viaduct is an important part of the urban three-dimensional traffic network,has the advantages of improving the traffic efficiency of the road network and integrating the new and old urban areas,urban and rural areas,etc.,and plays an important role in the development of new urbanization.In view of its bridge type required to follow the direction of the overall line,when crossing the river or ground roads and other structures under the bridge,the piers need to be crossed obliquely and the approach bridge on both sides should turn to the orthogonal direction.Taking a viaduct in Guangzhou as an example,the structural type of this type of river crossing bridge is optimized.The structural points of the oblique crossing to normal crossing heightening continuous box girder and the heterogeneity of the layout of prestressed tendons in different webs are introduced,and the seismic calculation of the beam grillage and lower part of this type of oblique bridge are discussed so as to provide some reference methods and ideas for the design of similar bridges.
urban viaductoblique river crossingstructure selectionbeam grillage analysisseismic calculation
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