Seismic Response And Cable-Tower Anchorage Detailed Stress Analysis Of Special-Shaped Leaning Tower Cable-Stayed Bridge

This thesis is based on the research of special-shaped leaning tower cable-stayed bridge with a span of 70+80+200+80+70m, and the finite element model of the whole bridge is established by using MIDAS/CIVIL,a professional bridge analysis software.The model takes into account the pile-soilinteraction, and can accurately simulate the bridge’s substructure and support according to the actual situation.On the basis of the full bridge model, using the influence matrix method and the inverse analysis method, the reasonable cable force of the bridge stage and the construction stage are determined respectively.The feasibility of the inverted analysis method is verified by comparing with the stage of the bridge construction and the stage of construction.Afterwards, the natural vibration characteristics of the bridge state are calculated and analyzed.Response spectrum method, linear time history method and nonlinear time history analysis method are used to analyze the seismic response of structures respectively.And the response spectrum method_and linear time history method are compared and analyzed to test the consistency of the two methods.The linear time history method and the nonlinear time history method are compared and analyzed to obtain the influence of the structure under the ground motion by using Seismic isolation support.Finally, the finite element model of the whole tower combination element based on the beam element, the plate element and the solid element is established by using ALGOR,a finite element software,and the steel anchor box area is refined.Then,on the basis,the stress of cable-pylon anchorage zone is analysed to check the rationality of the steel anchor box design, and put forward suggestions.