Analysis And Research On Near Field Seismic Response Of Long Span Continuous Rigid Frame Bridge Based On ANSYS

Along with our country economy growth,the transportation convenience is more and more important,especially in recent years the development of the western development,the necessity of highway facilities in the mountains built more and more urgent,so the continuous rigid-frame bridge will become one of the selection object.The continuous rigid frame with its great spanning capacity,better economical advantages widely used in highway and city Bridges,especially after the highway in a mountainous area is a large span bridge across the valleys of the most common.The beam body of continuous rigid frame is the continuous bridge pier,the bridge pier participates in the bending deformation,improves the integrity of the bridge and makes the vehicle safer.In this paper,the analysis of seismic design is very important and urgent to study the dynamic characteristics of the earthquake.In combination with the above,the main work of this article is:Firstly,the genesis of earthquakes and seismic waves and seismic hazards in detail,emphatically introduces the near-field earthquake,indicates the high pier continuous rigid frame bridge is the necessity of research on the influence of the near field seismic action.Secondly,in this paper,the progress of the research field of high piers in the field of high piers is described,and the progress of the research on seismic method is described.And then introduces the research progress of seismic design method,to domestic a continuous rigid frame bridge as an example,on both ends of the bridge is established by using finite element analysis software ANSYS respectively generally simply supported and spring simply supported constraints two entity model of the bridge.Thirdly,the rationality of the design of static analysis is performed by using the model of the simple constraint of the two ends,and then the modal analysis of the two models is based on ANASYS.The dynamic response data of the bridge was obtained by using the reaction spectrum method and the time-path analysis method.Fourthly,the study analyzes the two kinds of structure model under the effect of multi-dimensional earthquake dynamic response of the difference,it is concluded that the high pier continuous rigid frame bridge restrain some changes can contribute to the whole bridge seismic preliminary conclusion,for the same type bridge structure seismic design and analysis of research provide reference and reference.