【摘要】 为了明确软土层厚度对地铁车站结构地震反应的影响规律,本文中对常见的两层三跨岛式地铁车站结构侧向和底部地基中存在不同厚度软土层时9种软场地条件下地铁车站结构的地震反应进行了数值模拟分析。由本文和作者之前对软土层埋深影响地铁车站结构地震反应的共同研究结果来看:软土层位于地铁车站结构侧向地基时对地铁车站结构的抗震是非常不利的,尤其是软土层位于地铁车站结构侧向地基底部时最为不利,而当软土层位于地铁车站结构底部地基中时对其抗震性能一般是有利的,起到消能减震的作用;当软土层位于地铁车站结构侧向地基顶部时,随着软土层厚度的变大,对地铁车站结构抗震性能的影响越是不利且影响程度越大,而当软土层位于地铁车站结构侧向地基底部和底部地基中时,软土层厚度的变化对地铁车站结构抗震性能的影响规律并不具有很好的一致性。更多还原

【Abstract】 To confirm how the thickness of the soft soil layer affects the earthquake response of subway station,the finite-element method is used to model the dynamic interaction system of soil-subway station,in which nine soft sites with different thicknesses of soft soil layers are used as the foundation of subway station respectively.By the research results in this paper and others given by the authors before,it is disadvantageous to the earthquake resistance of subway station when the soft soil layers are located on lateral foundation of it,and it is especially disadvantageous when the soft soil layers are located at the bottom of lateral foundation.However,it is advantageous to the earthquake resistance of subway station when the soft soil layers are located under the foundation of it.When the soft soil layers are lying at the up of lateral foundation,it is more and more disadvantageous to the earthquake resistance of subway station with the thickness of soft soil layers becoming more larger.However,when the soft soil layers are lying at the bottom of lateral foundation or under the foundation of subway station,the thickness of soft soil layers has not accordant effect on the earthquake resistance of subway station.更多还原