预制纤维加固混凝土消能墙在循环荷载下的抗震性能

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2024-10-30 DOI:10.1016/j.istruc.2024.107635

Yu-Ming Zhang , Qing-Xuan Shi , Li Xin , Bin Wang , Yuan Liu , Peng Wu , Xing-Wen Liang

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引用次数: 0

摘要

消能装置用于改善高层钢筋混凝土（RC）框架的抗震性能和侧向刚度。纤维增强混凝土（FRC）具有应变硬化现象和多裂缝发展失效模式，是用作消能装置的理想材料。为研究纤维增强混凝土消能墙（FRCEDW）的抗震性能，设计并制作了四个不同长宽比、连接方法和配筋形式的试件。抗震性能包括破坏模式、承载能力、变形能力和循环试验下的耗能性能。结果表明：FRCEDW 在抗剪切破坏中占主导地位，并伴有大量细小裂缝。试样显示出良好的变形能力，延性系数大于 2，等效粘滞阻尼比大于 0.125，这意味着 FRCEDW 可用作预制结构的附加阻尼器。当长宽比从 2.27 增加到 2.83 时，延性系数从 2.14 变为 2.44，增加了 12.3%。使用 OpenSEES 进行了有限元分析。事实证明，SFI-MVLEM 建模方法能准确模拟 FRCEDW 在循环加载下的滞后响应。研究结果为 FRCEDW-RC 框架结构的进一步应用提供了参考。

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Seismic behavior of prefabricated fiber reinforced concrete energy-dissipation wall under cyclic loading

The energy dissipation devices were applied to improve the seismic performance and lateral stiffness of high-rise reinforced concrete (RC) frame. Fiber reinforced concrete (FRC) is an ideal material used as energy dissipation devices due to its strain hardening phenomenon and multi-crack development failure mode. To investigate the seismic performance of FRC energy-dissipation wall (FRCEDW), four specimens with different aspect ratio, connection method and reinforcement form were designed and fabricated. The seismic performance included damage mode, bearing capacity, deformation capacity and energy dissipation performance were investigated under cyclic test. The results show that: the FRCEDW experienced shear dominated flexural-shear failure, accompanied by a significant number of fine cracks. The specimens show good deformation capacity with a ductility coefficient greater than 2 and the equivalent viscous damping ratio greater than 0.125, which means FRCEDW can used as additional dampers in prefabricated structures. When the aspect ratio increased from 2.27 to 2.83, the ductility factor changed from 2.14 to 2.44 increased by 12.3 %. Finite element analysis was conducted using OpenSEES. The SFI-MVLEM modeling method had been proven accurately simulate the hysteresis response of FRCEDW under cyclic loading. The research results can give references to the further application of FRCEDW-RC frame structures.

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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.