【摘要】 应用有限元方法和粘弹性人工边界,建立了土-结构动力相互作用体系。对比分析了相对位置上不同的地上结构对地铁地下结构地震反应的影响。分析过程采用平面应变条件下的二维动力时程分析,选择的输入地震时程为Kobe时程。结果表明,地上结构的存在对地铁地下结构的层间相对位移、节点内力等地震反应指标产生了不可忽视的影响;且随着两者相对位置的改变,呈规律性变化。更多还原

【Abstract】 By using finite element method and viscoelastic artificial boundary,a soil-structure interaction system is established to simulate the influence of ground building on the seismic response of subway structure. The conditions of different relative positions between ground building and subway structure are analyzed. The analysis is simplified as two dimensional dynamic time-history analysis in plane strain and the Kobe seismic time-history is selected as the inputting wave. The results indicate that when considering the existence of ground building,the story relative displacements and internal forces of subway structure are greatly changed. And the influence of ground building on subway structure exhibits a regular change with the increase of their relative position.更多还原