Seismic Response Analysis And Shock Absorption Research For Long Span Cable-Stayed Railway Bridges

With the development of transport facilities, large-span cable-stayed bridge has been widely used in the field of railway bridges. Cable-stayed bridge across its superior capabilities and advantages of growing their own good to the long-span direction. Earthquake is a kind of natural disaster which is difficult to predict and the damage is very great. Occurrence of the strong motion often leads to the tremendous loss of life and property. The earthquake disaster of bridge is especially huge. Therefore, it is of great theoretical and practical significance to conduct comprehensive and systematic investigation on the earthquake-resistance of bridge.In this Paper, a study of long-span cable-stayed bridge, the establishment of spatial finite element model of cable-stayed bridge, the application of general-purpose finite element analysis of large-span cable-stayed bridge and its dynamic characteristics of the earthquake response, the main research contents are as follows:1. Summarize the development of the large-span bridge antiseismic theory. the response spectrum for antiseismic analysis and time-history method are presented and discussed.2. Set up full-space finite element model simulation for one River Bridge by MIDAS,,and then analyze its free vibration.3. The dynamic time-history analysis of the one Bridge with long-span has been finished. The response characteristics under the different seismic wave input are analyzed in details. Results in the calculation based on the results of the bridge analysis, to draw pertinent conclusions to sum up their Performance under seismic response, such as after the construction of a bridge for reference.