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(北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045)

［摘要］以西安某地鐵上蓋項(xiàng)目為工程背景，對(duì)高烈度地區(qū)采用下部框架+隔震層+上部剪力墻體系的地鐵上蓋結(jié)構(gòu)設(shè)計(jì)的關(guān)鍵技術(shù)要點(diǎn)進(jìn)行介紹。本項(xiàng)目主體結(jié)構(gòu)存在大底盤多塔、剛度突變、扭轉(zhuǎn)不規(guī)則、承載力突變等多項(xiàng)超限；同時(shí)存在首層為軟弱層和薄弱層、隔震層下一層框架剛度難以滿足對(duì)隔震層上一層剪力墻結(jié)構(gòu)的嵌固要求、樓面超長(zhǎng)、裙房框架和地基基礎(chǔ)的抗震設(shè)計(jì)要求高等眾多設(shè)計(jì)難點(diǎn)。針對(duì)以上結(jié)構(gòu)超限項(xiàng)和設(shè)計(jì)難點(diǎn)，在合理調(diào)整結(jié)構(gòu)體系、采用層間隔震技術(shù)減小上部結(jié)構(gòu)地震作用的基礎(chǔ)上，對(duì)蓋上蓋下各部分結(jié)構(gòu)構(gòu)件進(jìn)行抗震性能化包絡(luò)設(shè)計(jì)，并結(jié)合罕遇地震動(dòng)力彈塑性分析結(jié)果對(duì)結(jié)構(gòu)的抗震性能進(jìn)行了詳細(xì)的分析與評(píng)價(jià)。結(jié)果表明，在高烈度地區(qū)應(yīng)用上述結(jié)構(gòu)體系的地鐵上蓋項(xiàng)目技術(shù)可行，采用隔震技術(shù)結(jié)合構(gòu)件性能化設(shè)計(jì)等技術(shù)措施可有效保證結(jié)構(gòu)的抗震性能。 

［關(guān)鍵詞］地鐵上蓋結(jié)構(gòu)；結(jié)構(gòu)轉(zhuǎn)換；層間隔震；動(dòng)力彈塑性分析 

中圖分類號(hào)：TU375 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)19-0072-05

Research on interlayer isolation design of subway superstructure in high seismic intensity region  

SHU  Weinong,  LU  Qinggang,  GE  Dongdong,  ZHAO  Fan,  SHI  Yansheng,  ZHAN  Yanjie,  HUYAN  Chenzhao 

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

Abstract: Taking a subway superstructure project in Xi′an as the engineering background, the key technical points of the subway superstructure design using the lower frame+seismic isolation layer+upper shear wall structure system in high seismic intensity region were introduced. The main structure of the project has multiple out-of-code items such as large chassis with multi-tower, stiffness mutation, torsional irregularity, bearing capacity mutation, etc. At the same time, there are many design difficulties, such as the first floor is soft layer and weak layer, the stiffness of the frame below the seismic isolation layer is difficult to meet the embedded requirements of the shear wall structure above the seismic isolation layer, the exceeding of floor length, the high seismic design requirements of the podium frame and the foundation, etc. In view of the above structural out-of-code items and design difficulties, based on the reasonable adjustment of the structural system and the use of inter-layer seismic isolation technology to reduce the seismic action of the upper structure, the seismic performance envelope design of the structural members of the upper structure and the lower structure was carried out. And the seismic performance of the structure was analyzed and evaluated in detail in combination with the results of the dynamic elastic-plastic analysis of rare earthquakes. The results show that it is feasible to apply the above-mentioned structural system to the subway superstructure project in high seismic intensity areas, and the seismic performance of the structure can be effectively guaranteed by using the seismic isolation technology combined with the performance-based design of components. 

Keywords:subway superstructure； structure transfer； inter-layer seismic isolation； dynamic elastic-plastic analysis

作者簡(jiǎn)介：束偉農(nóng)，碩士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email： shuweinong1@sina.com； 通信作者：趙帆，碩士，工程師，Email：zhaofan@biad.com.cn。