【摘要】 为增强单柱双跨地铁车站的抗震性能,提高地铁车站的地震安全性,借鉴地上建筑隔震理念,提出在单柱双跨地铁车站的上层中柱顶部和顶板接触部位建立隔震支座的方法。应用有限元软件,建立设置隔震支座和未设置隔震支座两种工况的土-结构相互作用的三维有限元模型,分析地震作用下结构顶底板、侧墙、中柱的内力及水平变形变化规律,讨论隔震支座应用于单柱双跨地铁车站的隔震效果。结果表明,在单柱双跨地铁车站的上层中柱顶部和顶板接触部位建立隔震支座的设计理念是可行的,设置隔震支座后结构内力可降低60.9%,变形可降低22.0%,隔震效果显著。更多还原

【Abstract】 This paper proposes a novel method of setting up isolation support in the upper part of middle column and the contact part of roof—an approach which could enhance the seismic performance of the single-column double-span subway station structure and improve the seismic safety of the subway stations. The study based on the concept of the earth buildings isolation involves developing a three-dimensional finite element model of soil-structure interaction for two working conditions with and without isolation bearing set,using MIDAS-GTS software; analyzing the law underlying the internal force and horizontal deformation of roof and floor,side wall and center column of the structure under the action of earthquake; and discussing the application of isolation bearing to the single-column double-span subway station. The results validates the feasibility of establishing the design concept of isolation bearing at the contact part of the upper middle column top and roof of the single-column double-span subway station structure—a technique that could enable an internal force reduction by 60. 9% and displacement deformation reduction by 22. 0%. The isolation effect is remarkable.更多还原