In order to study the seismic dynamic response law of subway station under above-ground building,shaking table test with similarity ratio of 1∶40 was carried out in silty sand,and the acceleration,strain and dynamic earth pressure during the test are analyzed in detail.It is shown that:(1)With the increase of earthquake intensity,the peak acceleration at the same monitoring point is gradually increasing,but the amplification coefficient and variation amplitude of acceleration are gradually decreasing;(2)The maximum acceleration amplification coefficient of soil is located on the ground surface.With the increase of earthquake intensity,the position of the minimum acceleration amplification coefficient gradually transits from the bottom of the model to the location of the structure;(3)The strain of the model structure gradually increased with the increase of seismic intensity,and the relatively large strains mainly appeared at the intersection of side walls,middle columns and plates,especially at the end of middle columns;(4)The peak value of dynamic earth pressure in the middle of side wall is greater than the top and bottom,and the lateral stiffness or anti deformation capacity at the middle plate of the station should be appropriately enhanced.The research results can provide a reference for the seismic design and analysis of similar subway station structure.
关键词
地铁车站结构/地震响应/加速度/振动台试验/动土压力
Key words
subway station structure/seismic response/acceleration/shaking table test/dynamic earth pressure
维普
万方数据