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（廣州珠江外資建筑設(shè)計(jì)院有限公司， 廣州 510060）

［摘要］地鐵車(chē)輛段上蓋結(jié)構(gòu)普遍存在底部剛度突變、豎向構(gòu)件大量轉(zhuǎn)換等技術(shù)難題。以實(shí)際工程為例，引入“強(qiáng)下部弱上部”的概念，采用并縫技術(shù)合并轉(zhuǎn)換層，分析了地鐵上蓋全框支轉(zhuǎn)換結(jié)構(gòu)在小、中和大震作用下的抗震性能，并預(yù)測(cè)其在超越大震作用下的破壞機(jī)理。經(jīng)分析可知，采用“強(qiáng)下部弱上部”結(jié)構(gòu)概念可有效提高全框支轉(zhuǎn)換結(jié)構(gòu)抗震性能，并可引導(dǎo)結(jié)構(gòu)按照預(yù)設(shè)破壞模式失效，為今后類(lèi)似工程提供了一定的借鑒和參考。

［關(guān)鍵詞］強(qiáng)下部弱上部； 性能設(shè)計(jì)； 全框支轉(zhuǎn)換結(jié)構(gòu)； 車(chē)輛段

中圖分類(lèi)號(hào)：TU318文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

通訊作者：林鵬，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:Linp@pearlriver.com。