(北京市建筑设计研究院有限公司， 北京 100045)

［摘要］以西安某地铁上盖项目为工程背景，对高烈度地区采用下部框架+隔震层+上部剪力墙体系的地铁上盖结构设计的关键技术要点进行介绍。本项目主体结构存在大底盘多塔、刚度突变、扭转不规则、承载力突变等多项超限；同时存在首层为软弱层和薄弱层、隔震层下一层框架刚度难以满足对隔震层上一层剪力墙结构的嵌固要求、楼面超长、裙房框架和地基基础的抗震设计要求高等众多设计难点。针对以上结构超限项和设计难点，在合理调整结构体系、采用层间隔震技术减小上部结构地震作用的基础上，对盖上盖下各部分结构构件进行抗震性能化包络设计，并结合罕遇地震动力弹塑性分析结果对结构的抗震性能进行了详细的分析与评价。结果表明，在高烈度地区应用上述结构体系的地铁上盖项目技术可行，采用隔震技术结合构件性能化设计等技术措施可有效保证结构的抗震性能。 

［关键词］地铁上盖结构；结构转换；层间隔震；动力弹塑性分析 

中图分类号：TU375 文献标识码：A文章编号：1002-848X(2021)19-0072-05

Research on interlayer isolation design of subway superstructure in high seismic intensity region  

SHU  Weinong,  LU  Qinggang,  GE  Dongdong,  ZHAO  Fan,  SHI  Yansheng,  ZHAN  Yanjie,  HUYAN  Chenzhao 

(Beijing Institute of Architectural Design, Beijing 100045， China) 

Abstract: Taking a subway superstructure project in Xi′an as the engineering background, the key technical points of the subway superstructure design using the lower frame+seismic isolation layer+upper shear wall structure system in high seismic intensity region were introduced. The main structure of the project has multiple out-of-code items such as large chassis with multi-tower, stiffness mutation, torsional irregularity, bearing capacity mutation, etc. At the same time, there are many design difficulties, such as the first floor is soft layer and weak layer, the stiffness of the frame below the seismic isolation layer is difficult to meet the embedded requirements of the shear wall structure above the seismic isolation layer, the exceeding of floor length, the high seismic design requirements of the podium frame and the foundation, etc. In view of the above structural out-of-code items and design difficulties, based on the reasonable adjustment of the structural system and the use of inter-layer seismic isolation technology to reduce the seismic action of the upper structure, the seismic performance envelope design of the structural members of the upper structure and the lower structure was carried out. And the seismic performance of the structure was analyzed and evaluated in detail in combination with the results of the dynamic elastic-plastic analysis of rare earthquakes. The results show that it is feasible to apply the above-mentioned structural system to the subway superstructure project in high seismic intensity areas, and the seismic performance of the structure can be effectively guaranteed by using the seismic isolation technology combined with the performance-based design of components. 

Keywords:subway superstructure； structure transfer； inter-layer seismic isolation； dynamic elastic-plastic analysis

作者简介：束伟农，硕士，教授级高级工程师，一级注册结构工程师，Email： shuweinong1@sina.com； 通信作者：赵帆，硕士，工程师，Email：zhaofan@biad.com.cn。