Seismic response of subway station structure in liquefiable silt layer
The structural damage of subway stations under earthquakes has been a widespread is-sue.Affected by the sedimentary environment,such as river alluvium and seawater erosion,liq-uefiable silt layers are widely distributed in the Tianjin area.Silt liquefaction exerts an influence on subway station structure,but the degree of this influence is unclear.As standard transporta-tion hubs,parallel subway station systems are becoming increasingly common in urban areas,and thus,the seismic problem of adjacent stations in a station group needs to be studied urgently.The influence of fine content on the static and dynamic characteristics of silt was studied with a triaxial test.The parameters of a silt model with varying fine content were calibrated using the bounding surface plastic constitutive model PM4Silt.Through finite difference analysis,the ad-verse effect of soil layer with low fine content on the dynamic response of a subway station was clarified.The results provided insights for the site selection of stations in a liquefiable silt layer.In addition,the influence of station spacing on the interaction between adjacent stations was stud-ied through parametric analysis.The influence of the interactions between adjacent stations was revealed,and the reference value of optimal station spacing was provided.This study can provide a theoretical basis for the design of adjacent stations.
万方数据
维普
