Analysis Of A Single Concrete Tower Cable-Stayed Bridge With Steel Box Girder And Detailed Analysis Of Its Steel Anchorage Box

Taking a single tower cable-stayed bridge with a span of 130+130m as project background, a scheme design of a single concrete tower cable-stayed bridge with steel box girder was proposed, and then the steel box girder, the concrete tower and the stay cables of the bridge were designed through calculation.Firstly, after full consideration of the pile-soil interaction, the author stimulated the actual substructure and the bearings of the bridge within the model, a finite element model of the entire bridge with grillage method based on beam elements was established by using the MIDAS/CIVIL 2012, a professional bridge analysis software. Effects of the bridge were analyzed in detail under the dead load and combination of dead load, live load, temperature variations, wind load in operation. Secondly, the response spectrum method and time-history method were applied to study the seismic response of the bridge by the model above. Finally, an integrated finite element model of the entire bridge was established by using ANSYS 14.0, a finite element universal software, including solid elements, shell elements and link elements (292,033 elements). To simulate the anchorage structure of cable-girder in detail, the mesh of the steel box girder are refined in the full bridge model. The stress of the each steel plate in steel anchorage box under the dead load and combination of dead load and live load is calculated and analyzed to check the rationality of the steel anchorage box.