（华建集团华东建筑设计研究总院， 上海 200002）

［摘要］某多层钢框架结构高度约21m，结构抗侧刚度由建筑外围的框架提供。建筑体型向外倾斜，受限于建筑效果的要求，周边框架不能设置支撑。经过方案比选，选择采用基础隔震形式，以减小上部结构的地震响应，从而降低上部结构抗侧刚度的需求，实现建筑结构一体化设计。隔震层采用铅芯橡胶支座和弹性滑板支座混合布置的形式，得到的水平向减震系数约0.5，且在风荷载作用下隔震层保持弹性工作状态。设计采取增大柱距等措施，保证隔震支座在罕遇地震作用下不致出现拔力。本工程结构自振周期较长，合理的隔震设计取得了理想的隔震效果，对同类工程有借鉴意义。

［关键词］钢框架结构； 基础隔震； 抗侧刚度； 铅芯橡胶支座； 弹性滑板支座

中图分类号：TU398-7， TU352.12文献标识码：A文章编号：1002-848X(2020)18-0109-06

Seismic isolation design and analysis of a multi-story steel framed structure shaped inclined outward

YAN Qi, BAO Lianjin, ZHU Xiaodong

(Arcplus Group PLC East China Architectural Design & Research Institute, Shanghai 200002, China)

Abstract:The height of a  multi-story steel frame structure is about 21m, and the lateral stiffness of the structure is provided by the frame around the building. The structural shape is inclined outward, due to the requirements of the building aesthetic requirements, braces cannot be adopted for the outer frame. After the comparison and selection of the scheme, the base isolation form is selected to reduce the seismic response of the upper structure, thereby reducing the demand for lateral stiffness of the superstructure and realizing the integrated design of structural design and architectural design. The seismic isolation layer adopts a mixed arrangement of lead-core rubber bearings and elastic sliding plate bearings. The obtained horizontal shock absorption coefficient is about 0.5, and the seismic isolation layer maintains an elastic working state under the wind load. The design adopts measures such as increasing the column spacing to ensure that the seismic isolation support does not appear to pull out under the action of rare earthquakes. The structure of this project has a long natural vibration period, and the reasonable isolation design has achieved ideal isolation effects, which is of reference significance for similar projects.

Keywords:steel framed structure; base seismic isolation; resistant-lateral rigidity; lead-core rubber bearing; elastic sliding plate bearing

作者简介：闫琪，硕士，工程师，Email: qi_yan@ecadi.com。