【摘要】 基于ABAQUS软件研发的显式有限元并行计算集群平台,建立三拱立柱式地铁地下车站结构三维精细化有限元分析模型;研究大地震近场和远场地震动作用下地铁地下车站结构三维非线性地震反应特性。结果表明:地震作用下,三拱立柱式车站立柱底部为最危险部位,两侧副拱较中间主拱安全;两侧副拱拱璧损伤没有框架式车站结构外墙损伤严重;两侧副拱与竖向轴夹角约为30°处上、下拱壁上损伤指数最大;地铁地下车站结构峰值加速度沿车站纵轴线方向呈波浪状,纵轴线中点附近峰值加速度最大;三拱立柱式地铁车站的破坏主要和结构相对位移角有关,其破坏模式主要为剪切破坏。更多还原

【Abstract】 At present,most studies on seismic responses of subway station structures are focused on framed subway stations.Based on software ABAQUS and the independently-developed 32 CPU parallel computing cluster platform,the three-dimensional refined finite element model was established for three-arch and two-column subway station structures.The 3D model was used to study the nonlinear seismic responses of the subway station structures under far-field and near-field ground motions.The results show as follows: Under ground motions,for the subway station structure,the bottoms of columns are the most dangerous position and the arches on both sides are safer than the main arch in the middle;the walls of both side archs are less damaged than the outer wall of framed subway station;the maximum seismic damage index appears on the upper and lower side arch walls at the position of the intersection angle of 30° between the side archs and vertical axes;the peak horizontal accelerations along the ordinate axis of the subway station show a wavy distribution and the maximum peak acceleration appears near the mid-section of the longitudinal axis;the damages to the three-arch and two-column subway station are mainly related to the relative displacement angle of the structure,meanwhile,the main failure mode is the shear failure.更多还原