Seismic behavior of assembled self-centering buckling-restrained brace based on shape memory alloy cables

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-02-07 DOI:10.1016/j.tws.2025.113044

Yu Shi , Zulong Li , Xiaowei Ran , Ziqi Zhao , Xiong Peng

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Abstract

This paper presents the development and validation of the concept of an assembled self-centering buckling-restrained brace (ASC-BRB) based on shape memory alloy (SMA) cables. It consists of a self-centering system composed of SMA cables and an energy-dissipation system comprising core plates and restraining members. All members can be reused after earthquakes, except for the core plates that undergo damage. This paper comprehensively details the configuration, working mechanism, theoretical hysteretic model, and design methodology of the ASC-BRB. Subsequently, quasi-static tests conducted to investigate the effects of mechanical training, SMA area, core plate area, and SMA cable pre-tensioning force on the performance of the ASC-BRB are described. The experimental results demonstrate that the ASC-BRB exhibits favorable energy dissipation and self-centering capabilities in comparison to the BRB (buckling-restrained brace). Experimental validation of the proposed theoretical hysteresis and finite element models are further described. Finally, some design suggestions based on the parametric analysis are summarized.

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形状记忆合金电缆组合自定心屈曲约束支撑的抗震性能

本文介绍了基于形状记忆合金（SMA）电缆的装配自定心屈曲约束支撑（ASC-BRB）概念的发展和验证。它由由SMA电缆组成的自定心系统和由芯板和约束构件组成的耗能系统组成。除了核心板块受损外，所有构件在地震后都可以重复使用。本文全面介绍了ASC-BRB的结构、工作机理、理论滞回模型和设计方法。随后，进行了准静态试验，以研究机械训练、SMA面积、芯板面积和SMA电缆预张紧力对ASC-BRB性能的影响。实验结果表明，ASC-BRB具有较好的能量耗散和自定心能力。进一步描述了所提出的理论迟滞和有限元模型的实验验证。最后，总结了基于参数分析的设计建议。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.