宁波恒大大厦振动台试验及抗震性能

IF 1.8 3区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Structural Design of Tall and Special Buildings Pub Date : 2022-09-18 DOI:10.1002/tal.1987

B. Zhao, Yi-Chian Lin, Xin Li, Ying Zhou

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引用次数: 1

摘要

宁波恒大大厦位于中国宁波市，是一座超高层建筑。它有91层，总高度为450米。该建筑的结构体系由钢筋混凝土核心、外框架体系和连接核心墙与外框架的支腿桁架三部分组成。独特的外框架系统是轴形斜柱。支腿桁架位于地面以上三个不同的高度，从而加强了建筑，并在建筑高度上形成了结构刚度的不规则性。建筑的抗震设计和分析面临着巨大的挑战。对1/40比例的建筑物模型进行了振动台试验，在一系列不同振幅的基础激励下进行了振动台试验。研究了结构的动力特性、地震反应和破坏机制。试验结果表明，该结构在设计水平地震作用下表现良好。根据试验模型的可见损伤，找出了结构的薄弱环节，并提出了改善建筑物抗震性能的建议。建议采取措施提高建筑物71层至79层及相邻楼层的延性。

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Shaking table test and seismic behavior of Ningbo Hengda Tower

A super tall building named Ningbo Hengda Tower is located in Ningbo City, China. It has 91 stories with a total height of 450 m. The structure system of the building consists of three parts, that is, the reinforced concrete core, the outer frame system, and the outrigger trusses connecting the core wall and outer frame. The unique outer frame system is spindle shaped with oblique columns. The outrigger trusses are located at three different levels above the ground, thus strengthening the building and creating irregularities in the stiffness of the structure along the building height. Great challenges are existed in seismic design and analysis of the building. Shaking table test was carried out for a 1/40 scaled model of the building under a series of different base excitations with increasing amplitudes. The dynamic properties, seismic responses, and failure mechanism of the structure are investigated. Test results show that the structure behaved well under designed level earthquakes. The weak points of the structure are identified based on visible damage of the tested model, and some suggestions are made for the improvement of the seismic behavior of the building. It is suggested that measures be taken to improve the ductility of the building from floor 71 to floor 79 and the adjacent floors.

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来源期刊

Structural Design of Tall and Special Buildings 工程技术-工程：土木

CiteScore

5.30

自引率

4.20%

发文量

审稿时长

6-12 weeks

期刊介绍： The Structural Design of Tall and Special Buildings provides structural engineers and contractors with a detailed written presentation of innovative structural engineering and construction practices for tall and special buildings. It also presents applied research on new materials or analysis methods that can directly benefit structural engineers involved in the design of tall and special buildings. The editor''s policy is to maintain a reasonable balance between papers from design engineers and from research workers so that the Journal will be useful to both groups. The problems in this field and their solutions are international in character and require a knowledge of several traditional disciplines and the Journal will reflect this. The main subject of the Journal is the structural design and construction of tall and special buildings. The basic definition of a tall building, in the context of the Journal audience, is a structure that is equal to or greater than 50 meters (165 feet) in height, or 14 stories or greater. A special building is one with unique architectural or structural characteristics. However, manuscripts dealing with chimneys, water towers, silos, cooling towers, and pools will generally not be considered for review. The journal will present papers on new innovative structural systems, materials and methods of analysis.