Seismic Response Analysis Of High Pier And Long-span Curve Continuous Rigid Frame Bridge

With the continuous development of transportation industry in our country, span and high piers-continuous rigid frame bridge are constantly increasing. More and longer curved continuous rigid frame bridges are necessary to be build in order to satisfy the request of route direction and landform. Compared with the small and medium span Bridges, long span curve continuous rigid frame bridge with high-rise piers of the seismic response and seismic design are more complicated. In Chinese standard "Seismic Design of Highway Bridges"(JTG/T B02-01-2008), relavant provisions are make for less than150meters span beam bridge and arch bridge, but no specific rules and requirements are made for more than150meters span bridge except for some design principles. As a result, the dynamic properties and seismic response analysis of this kind of bridge is of great significance. The main research content in this paper is as follows:This paper first introduces the curve continuous rigid frame bridge and its structure characteristics, and briefly expounds the characteristics and high pier large-span bridge seismic damage curve rigid frame bridge seismic research present situation. Then the paper simply introduces the basic theory of seismic response analysis of bridge, and Expounds the wide application of the dynamic response spectrum method and dynamic time history analysis method and the selection of suitable seismic waves. Taking the hei ya gou bridge as the engineering background, the bridge space finite element dynamic calculation model is established, and then the paper carry on the modal analysis of the bridge, mastering the dynamic characteristics of this bridge.Then multiple variable parameter model was established, considering the dynamic response spectrum analysis method, The structure of different radius of curvature and the direction of different earthquake excitation seismic response analysis. Studies of these factors are made on the high pier continuous rigid frame bridge in response to the impact of the earthquake. The dynamic analysis method is used to study the interaction of piles and soil seismic response law of high pier and long span curve continuous rigid frame bridge, and puts forward some design Suggestions. The paper analyzes the research object considering traveling wave effect of the seismic response characteristics, and makes compares with the callculation results using the consistent energized method. The research summarizes the influence law of seismic response of the traveling wave effect on the bridge.Finally, the paper summarizes the work and draws some conclusions, expecting to provide useful corresponding reference for the seismic design and research of similar Bridges. At the same time, the problems in the process of research are prospected.