Gusset plate friction damper with double plate core buckling-restrained brace

IF 4.3 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-09-18 DOI:10.1016/j.istruc.2025.110243

Makoto Sakai , Hiroshi Tagawa , Xingchen Chen , Makoto Uehara , Makoto Nishimura

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引用次数: 0

Abstract

Buckling-restrained braces (BRBs) are widely applied in building structures to control vibrations during major earthquakes. However, conventional BRBs do not yield or dissipate energy at low vibration amplitudes. To address this concern, this study proposes gusset plate friction dampers (GPFDs) with a double-plate core buckling-restrained brace (BRB). To delay the BRB action, gusset plates with multiple slot holes were used. Under a small vibration, a friction force is generated at the brace-end connection portions, whereas under a large vibration, the bolts contact the gusset plates, and the core plates of the BRB yield with a delay. Therefore, a BRB with GPFDs can provide a double-stage energy-dissipation mechanism for various earthquake intensities. Cyclic loading tests were performed for the test specimens of the BRB with GPFDs, and the results revealed a superior hysteretic performance, exhibiting double-stage energy dissipation. Furthermore, loading tests and finite element analyses were performed for connections with misaligned slot holes in the gusset plate to investigate the manufacturing accuracy requirements of slot holes for a safer design.

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扣板摩擦阻尼器与双板核心屈曲约束支撑

抗屈曲支撑（brb）广泛应用于建筑结构中，以控制大地震时的振动。然而，传统的brb在低振动幅值时不产生或耗散能量。为了解决这一问题，本研究提出了带有双板核心屈曲约束支撑（BRB）的扣板摩擦阻尼器（GPFDs）。为了延迟BRB的作用，使用了带有多个槽孔的扣板。小振动时，支座端部连接处产生摩擦力，大振动时，螺栓与扣板接触，BRB芯板延迟屈服。因此，具有GPFDs的BRB可以在不同烈度下提供双级耗能机制。对加了GPFDs的BRB试件进行了循环加载试验，结果表明BRB具有较好的滞回性能，表现为双级能量耗散。此外，还对扣板槽孔错位连接进行了加载试验和有限元分析，研究了槽孔的制造精度要求，以实现更安全的设计。

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.