Performance‐based plastic design and seismic performance evaluation of twisted diagrids with shear links

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

Structural Design of Tall and Special Buildings Pub Date : 2022-07-18 DOI:10.1002/tal.1974

S. Song, Chonghou Zhang

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引用次数: 1

Abstract

Twisted diagrid tube structures have become popular due to their significant lateral resistance and esthetic potential. However, the ductility and energy dissipation capacity of twisted diagrid structures are poor. This paper presents a seismic resilient fused structural system named the twisted diagrids with shear links (TDSL), and the performance‐based plastic design (PBPD) method is introduced for designing a 24‐story prototype structure. The numerical model of the TDSL prototype is established, then nonlinear static and dynamic analyses are conducted to evaluate the seismic behavior of the prototype. The results reveal that the TDSL system can significantly improve the post‐yield performance compared to the conventional twisted diagrid structure, and the performance objectives are achieved properly. Subsequently, incremental dynamic analyses are carried out to investigate the collapse fragility of the TDSL prototype, and the collapse risk of the prototype is assessed by FEMA P695. The results indicate that the TDSL prototype has satisfactory collapse‐resisting capacity under earthquakes. It is also found that corner columns can improve the seismic safety of the prototype against collapse. In general, the TDSL system is an appealing choice for twisted buildings in seismic regions.

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基于性能的剪切连接扭斜板塑性设计和抗震性能评估

扭网筒结构由于其显著的横向阻力和美学潜力而受到欢迎。但扭网结构的延性和耗能能力较差。本文提出了一种具有抗震弹性的融合结构体系，即带剪切链接的扭曲斜桁(TDSL)，并将基于性能的塑性设计(PBPD)方法引入到24层原型结构的设计中。建立了TDSL原型的数值模型，并进行了非线性静力和动力分析，对原型的抗震性能进行了评价。结果表明，与传统的扭网结构相比，TDSL系统可以显著提高后产性能，达到了预期的性能目标。随后，采用增量动态分析方法研究了TDSL原型的倒塌脆弱性，并采用FEMA P695对原型的倒塌风险进行了评估。结果表明，TDSL原型在地震作用下具有令人满意的抗倒塌能力。还发现角柱可以提高原型的抗震安全性。一般来说，TDSL系统是地震地区扭曲建筑物的理想选择。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.