【摘要】 针对已有研究方法的不足,开展土-地铁车站结构静、动力耦合作用理论和计算方法的初步研究,建立土-地下结构静、动力耦合非线性相互作用的物理力学分析模型,在此基础上开展一般场地上双层多跨大型地铁车站结构在静、动力耦合作用下的力学反应及其地震成灾机制研究。研究结果表明:在静、动力耦合作用下,双层多跨大型地铁车站结构构件出现地震震害的先后顺序为:中板与侧墙连接部位处的下表面、中柱顶底端、顶板与侧墙的连接部位下表面、底板侧跨中部上表面、顶板中跨与柱的连接部位上表面;(2)中柱的顶、底端和侧墙的底部为抗震最不利的部位,当输入地震动强度较小时,这些部位只发生局部受拉或受压破坏,当输入地震动强度增强时,这些部位往往会发生受拉和受压破坏交替出现的严重破坏;(3)具有脉冲特性的近场地震波更易造成地铁车站结构的动力损伤或地震破坏。更多还原

【Abstract】 According to the limitation of existed methods used to analyze the earthquake response of soil-structure dynamic interaction,the nonlinear static and dynamic coupling interaction of soil-underground structure theory and calculation model are developed.Based on the model,the earthquake response and damage mechanism of subway station with two layers and three spans are analyzed,respectively.The research results show that:(1) Under the static and dynamic coupling loadings,the damage orders of subway station members are obtained in detail.The lower surface of middle slab near to the lateral wall is damaged firstly;and the severely damages take place on the ends of middle columns.The lower surface of the top slab near to the lateral wall,the upper surface of bottom slab on the side span,and the upper surface of top slab near to the middle column are damaged in turns.(2) As a whole,the ends of middle columns and the bottoms of lateral walls are damaged more easily and severely.The members of subway station are almost damaged by tensioning or compressing respectively when weak earthquake ground motion is inputted.However,when the earthquake ground motion become stronger,these members are damaged by tensioning and compressing simultaneously.(3) At the same time,the subway station may be damaged more easily and severely by near field earthquake.更多还原