Seismic performance of braced mega frame-core tube structure system

被引：0

作者：

Zhou X. ^{[1
]}

Shan W. ^{[1
]}

Liu J. ^{[1
]}

Lin X. ^{[2
]}

Fu X. ^{[3
]}

机构：

[1] School of Civil Engineering, Chongqing University, Chongqing

[2] Institute of Engineering Mechanics, China Earthquake Administration, Harbin

[3] College of Civil and Transportation Engineering, Shenzhen University, Shenzhen

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2021年 / 42卷 / 01期

关键词：

Braced mega frame-core tube structure system; Elasto-plastic time-history analysis; Seismic performance; Super high-rise building;

D O I：

10.14006/j.jzjgxb.2020.0036

中图分类号：

学科分类号：

摘要：

Considering the structure of Shenzhen Ping An Finance Center (PAFC) as the prototype building, a new system, i.e. braced mega frame-core tube structure system, was proposed. The corresponding seismic performance was studied and compared with the existing common structure system of mega frame-core tube-outrigger truss for super high-rise buildings. The results indicate that this new kind of structure can reduce the steel consumption significantly when the two comparative structures own similar lateral stiffness. The typical yielding sequence under rare earthquakes is core tube→mega column→mega brace→outrigger truss. The stiffness and the sustained shear force of the outside mega-frame are increased obviously. The lateral stiffness of the outside mega frame and inside core tube is balanced significantly.The requirements of shear connections are reduced, which protect the inside core tube and reduce the sectional area and stiffness of outrigger truss. The sudden changes of the inter-story stiffness between outrigger truss stories and adjacent upper and lower stories are reduced significantly. The braced mega frame-core tube is a kind of composite structure systems with superior seismic performance, which is suitable for super high-rise buildings of more than 500 m. © 2021, Editorial Office of Journal of Building Structures. All right reserved.

引用

页码：75 / 83

页数：8

共 14 条

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