Analysis of Seismic Performance of Vibration Isolation Structures on Railway Transportation Superstructure
As an effective measure to solve the vibration and noise pollution of rail transit superstructure,the base isolation technology is not widely used in domestic projects,especially for local vibration isolation structure,for which there is no normative standard to guide it.Taking a rail transit superstructure in Changle District,Fuzhou,as a background,the seismic performance indexes of non-isolated structure,overall vibration isolation structure,and local vibration isolation structure with different ratios are compared,and it is concluded that the local vibra-tion isolation structure can meet the requirements of seismic defense and the seismic performance of local vibration isolation in a small range is basically the same as that of the non-isolated structure.Through the dynamic time-course analysis,under the rare-earthquake condi-tion,the adjacent non-isolated vertical members in the vibration isolation zone of the locally vibration-isolated structure have more shear force increase,and measures need to be taken to avoid the shear damage of the members.
superstructurepassive vibration isolationintegral vibration isolationlocal vibration isolationsteel spring isolator
万方数据
维普
