(启迪设计集团股份有限公司, 苏州 215021)

摘要: 地铁上盖建筑下部结构为了满足工艺要求一般采用框架结构,上部住宅为剪力墙结构,两种结构形式不可避免地会造成上下层刚度的突变,盖上大面积深厚覆土的巨大质量将带来强烈的地震反应,并且上部开发一般晚于下部地铁车辆段的实施,为了给后期上部开发预留一定变化的余地,本工程地铁车辆段上盖采用底部框架+隔震层+剪力墙的结构体系. 采用隔震技术的车辆段上盖具有竖向构件不连续、大底盘多塔、竖向收进等多项不规则,为了保证结构满足各项性能要求,对上部结构、隔震层、下部结构设定不同的性能目标,并采用多种切分模型进行对比分析;对隔震支座进行了应力、位移、抗整体偏心率、抗风等验算;采用动力弹塑性时程对结构进行专项分析,以确保结构的安全,通过分析计算提出上盖结构隔震设计思路.

关键词: 地铁上盖建筑; 隔震设计; 转换层; 隔震支座; 偏心率; 动力弹塑性时程分析

中图分类号:TU375 文献标志码:A 文章编号:1002⁃848X(2022)07⁃0136⁃05

DOI:10. 19701 / j.jzjg.SZY2124

Seismic isolation design of a metro depot superstructure

ZHU Yi, ZHU Liming, ZHANG Min

(Tus⁃Design Group Co., Ltd., Suzhou 215021, China)

Abstract: In order to meet the process requirements, the substructure of metro depot superstructure generally adopts framestructure while the upper dwelling is shear wall structure. The two structural forms inevitably lead to the abrupt change ofupper and lower layer stiffness, strong seismic response will be produced by the great mass of a large area of deep cover.Meanwhile, the construction of metro depot superstructure is later than that of substructure, in order to reserve a certainroom for changes in the later development of the superstructure, the metro depot superstructure of this project adopts thestructural system of bottom frame+isolation layer+shear wall. The metro depot superstructure with isolation technology hasseveral irregularities such as discontinuously vertical member, large chassis with multi⁃tower and vertical retraction. Toensure that the structure can meet the performance requirements, different performance goals were set to superstructure,isolation layer and substructure, and several sliced models were adopted for comparative analysis. The stress, displacement,anti⁃overall eccentricity of the steadies and wind resistance of isolation support were also checked. The dynamic elastic⁃plastic time history analysis was carried out for special analysis of the structure for the safety of structure. Through thoseanalysis and calculation, ideas of seismic isolation design of superstructure was proposed.

Keywords:metro depot superstructure; seismic isolation design; transition⁃storey; isolation support; eccentricity ratio;dynamic elastic⁃plastic time history analysis

第一作者:朱怡,学士,正高级工程师,一级注册结构工程师,主要从事轨道交通、复杂结构的研究,Email:yi.zhu@ siad⁃c.com.

[引用本文] 朱怡,朱黎明,张敏. 某地铁车辆段上盖结构隔震设计[ J]. 建筑结构,2022,52(7):136⁃140,85. ZHUYi,ZHU Liming,ZHANG Min. Seismic isolation design of a metro depot superstructure[ J]. Building Structure,2022,52(7):136⁃140,85.