Seismic performance of steel tube confined steel reinforced concrete frame with replaceable buckling restrained braces

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research Pub Date : 2025-07-26 DOI:10.1016/j.jcsr.2025.109823

Wanqian Nie , Guozhong Cheng , Xuesong Shi , Yuanlong Yang , Huyue Zhang , Yohchia Frank Chen

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引用次数: 0

Abstract

To develop high-performance, repairable steel-concrete composite structural systems, this study proposes a highly efficient seismic-resistant, post-earthquake repairable, and highly industrialized circular steel tube confined steel reinforced concrete(STCSRC) frame structure with replaceable buckling-restrained braces(BRBs). Experimental research was conducted to investigate the seismic performance of this structure. The study clarifies the yield path and plastic energy dissipation mechanism, and evaluates the replaceability of BRBs, as well as the structural seismic performance before and after BRB replacement. The test results demonstrate that incorporating BRBs significantly enhances the lateral stiffness, load-bearing capacity, ductility, and energy dissipation capacity of the STCSRC frame. The structural yield sequence follows the order of BRB-beam-column. The BRB effectively protects the main structure, and replacing it restores the seismic performance of the structure. The BRBs, connected to the frame beam ends by pin connections, facilitate quick replacement after earthquakes, effectively enhancing the seismic resilience of the STCSRC frame.

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可更换屈曲约束支撑钢管承压钢筋混凝土框架的抗震性能

为了开发高性能、可修复的钢-混凝土组合结构体系，本研究提出了一种具有可更换屈曲约束支撑（brb）的高效抗震、震后可修复、高度工业化的圆钢管承压钢-混凝土框架结构。对该结构的抗震性能进行了试验研究。阐明了BRB的屈服路径和塑性耗能机理，评价了BRB的可替换性，以及BRB替换前后的结构抗震性能。试验结果表明，加入brb显著提高了STCSRC框架的侧移刚度、承载能力、延性和耗能能力。结构屈服顺序遵循brb -梁柱顺序。BRB有效地保护了主体结构，取代它可以恢复结构的抗震性能。brb与框架梁端通过销连接连接，便于震后快速更换，有效增强了STCSRC框架的抗震能力。

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

Journal of Constructional Steel Research 工程技术-工程：土木

CiteScore

7.90

自引率

19.50%

发文量

550

审稿时长

46 days

期刊介绍： The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.