（广州珠江外资建筑设计院有限公司， 广州 510060）

［摘要］地铁车辆段上盖结构普遍存在底部刚度突变、竖向构件大量转换等技术难题。以实际工程为例，引入“强下部弱上部”的概念，采用并缝技术合并转换层，分析了地铁上盖全框支转换结构在小、中和大震作用下的抗震性能，并预测其在超越大震作用下的破坏机理。经分析可知，采用“强下部弱上部”结构概念可有效提高全框支转换结构抗震性能，并可引导结构按照预设破坏模式失效，为今后类似工程提供了一定的借鉴和参考。

［关键词］强下部弱上部； 性能设计； 全框支转换结构； 车辆段

中图分类号：TU318文献标识码：A文章编号：1002-848X(2020)10-0109-06

Application of performance design with “strong lower part and weak upper part” in the full-frame support transition structure of the metro depot

YANG Jian, LIN Peng, YANG Kun, ZHU Lixiong

(Guangzhou Pearl River Foreign Investment Architectural Designing Institute Co., Ltd., Guangzhou 510060, China)

Abstract:Technical problems such as sudden changes in stiffness at the bottom and a large number of vertical members are common in the upper structure of metro depots. Taking the actual project as an example, the concept of “strong lower part and weak upper part” was introduced, and the transition layer is merged using the joint seam technology. The seismic performances of the full-frame support transition structure  of metro depots under the frequent, design and rare earthquakes were analyzed and its failure mechanism of the earthquake was predicted. It is concluded that the concept of "strong lower part and weak upper part" can effectively improve the seismic performance of the full-frame support transition structure, and can guide the structure to fail according to the preset failure mode, providing a certain reference and reference for similar projects in the future.

Keywords:strong lower part and weak upper part; performance-based design; full-frame support transition structure; depot

通讯作者：林鹏，硕士，高级工程师，一级注册结构工程师，Email:Linp@pearlriver.com。