长悬臂岛式地铁高架车站抗震性能研究

Research on the seismic performance of island elevated subway station with long cantilever

针对某长悬臂岛式地铁高架车站的抗震性能,采用振型分解反应谱法对钢混组合结构横向独柱高架车站、钢混组合结构横向双柱高架车站和预应力混凝土结构高架车站3种结构形式进行地震作用计算及分析。基于整体建模和结构性能设计理念,比较不同结构形式下长悬臂地铁高架车站结构在地震作用下的结构整体受力性状、位移变形及墩柱和悬臂构件的延性比等关键指标,得出长悬臂岛式地铁高架车站的设计性能控制条件。研究结果表明:钢混组合结构可以有效降低结构的地震力,具有优越的抗震性能。以期为现行地铁高架车站的性能设计提供理论指导与参考。

In this paper,the seismic performance of an island elevated subway station with long cantilever is studied.The seismic effect calculation and analysis of three structural forms of the elevated station,which are steel-composite structure with transversal single column,steel-composite structure with transversal double column and the pre-stressed concrete structure,are carried out by using the mode decomposition response spectrum method.Based on the concept of structural performance design,this paper compares the key indicators of structural behavior,deformation,ductility ratio of the pier and cantilever,as well as other key indicators of island elevated subway station with long cantilever in different structural forms.It is noted that the weak points of control conditions and design performance of island elevated subway elevated station with long cantilever,with a view to provide theoretical guidance and reference for the design of current subway elevated stations.