Dynamic Response Analysis Of Elevated Rail Bridge Under Earthquake

It is very common to see such important issues as the traffic congestion, traffic jams, traffic chaos, and vehicle sewage serious in modern cities. At the same time, rail traffic is a quick, low pollution, high efficiency and large volume transport. So it is an effective means to use rail traffic to solve the traffic problems. In addition, because the urban rail viaducts can make full use of the urban space, it plays an irreplaceable role in many large and medium-sized cities to ease traffic pressure. The urban rail viaducts include Ballasted track structure and Non-ballasted track structure. The two track structure play a very important role for urban transport, in particular the non-ballasted track structure type is the development trend of the development. Our country is an earthquake-prone country; in our country the earthquake area is wide and frequent. How to enhance the seismic performance of the elevated rail bridge is an extremely harsh truth. So it is imperative to do a good job of the elevated rail bridge seismic performance.On the base of learning and analyzing the results of previous studies, this passage did a further analysis of the seismic performance of urban elevated rail bridge. The main tasks are as follows:(1) Analyzed domestic and foreign research status of the elevated rail bridge, and indicated the need for analysis of the seismic performance of urban bridge.(2) By the finite element software ANASYS, the slab track structure type, the elastic support block rail structure type, the ballasted track structure type were established. The model took into account the role in binding of the track on the bridge.(3) Took the Ninghe wave and El-centro wave for vibration, Under the role of the type of seismic acceleration, combined with the non-consider-case of the track structure, after calculated different structures, they were compared and analyzed. Then the relatively reasonable seismic structure was eventually arrived.