（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］海口美兰国际机场T2航站楼场地设防烈度为8度（0-30g），属于高烈度区，同时建筑功能决定其属于人流密集的大型公共建筑，抗震设防类别为重点设防类。项目首次采用跨层设置隔震层的隔震方案，隔震层采用普通橡胶支座、铅芯橡胶支座及弹性滑板支座组合,通过隔震相关的计算分析及验算，设防地震作用时隔震后上部结构楼层剪力及楼层加速度降低至非隔震时的35%以下，达到隔震层上部的混凝土框架及屋盖钢结构支承结构满足降低设防烈度一度设计的相关要求。同时对跨层位置的竖向构件进行罕遇地震的变形及承载力验算，确保竖向构件满足抗剪弹性、抗弯不屈服的承载力要求，确保跨层隔震的隔震效果及相关构件的性能满足设计预期。

［关键词］跨层隔震； 减震系数； 概念设计； 弹性滑板支座

中图分类号：TU393-3文献标识码：A文章编号：1002-848X(2018)20-0079-04

Study on  cross-layer isolation design on T2 terminal of Haikou Meilan International Airport

 Bu Longgui, Wu Zhongqun, Shu Weinong, Zhu Zhongyi, Liu Fei

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

Abstract:The fortification intensity of T2 terminal of Haikou Meilan International Airport is 8   degree(0.3g), which belongs to the high intensity area. At the same time, the building function determines that it  is a large public building with dense crowds. The seismic fortification category is the key fortification class. The project adopts the cross-layer isolation for the first time. Common rubber bearings, lead rubber bearings and elastic slide bearing are used in the isolation layer. Through the isolation related calculation and analysis, the shear strength and floor acceleration of upper structure after isolation  under inter-mediate earthquake are reduced to less than 35% of those without isolation. The upper concrete frame and roof steel structure supports meet the design requirements for reducing the fortification intensity design. The calculation of the deformation and bearing capacity of the vertical components at the cross-layer position under the rare earthquake is carried out to ensure that the vertical components meet the requirements and to ensure that the vibration isolation effect and the performance of related components meet the design expectations. 

Keywords:cross-layer isolation; damping coefficient; conceptual design; elastic sliding bearing

作者简介：卜龙瑰，硕士，高级工程师，一级注册结构工程师，Email：99790522@qq.com。