Study on the bond-slip mechanism between crescent ribbed rebar and recycled aggregate concrete: rib-scale simulation and theoretical analysis

IF 6.7 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of building engineering Pub Date : 2025-04-14 DOI:10.1016/j.jobe.2025.112666

Biao Liu , Kaiwen Zhang

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引用次数: 0

Abstract

This paper focuses on the bond-slip mechanism between crescent ribbed rebar and recycled aggregate concrete (RAC) at rib scale. Firstly, the auxiliary software for parametric modeling has been developed, which can instantly create 3D rib-scale simulation models. Secondly, the development law of internal damage along longitudinal and transverse directions was revealed, and the opening displacement, interface pressure, and stress at the rib were analyzed in detail. Then, parametric study and mechanism analysis were conducted. The bond strength decreases as the anchorage length, rib spacing, and replacement rate increase, but increases as the rib height and relative thickness of protective layer increase. The influence of the angle between the rib and the axis follows a quadratic function relationship. The inclination angle of the rib side has an impact after the peak. Finally, the empirical model for the ultimate and residual bond strength of rebar in RAC, considering rib dimensions, was proposed.

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新月形带肋钢筋与再生骨料混凝土粘结滑移机理研究：肋尺度模拟与理论分析

本文重点研究了月牙形带肋钢筋与再生骨料混凝土（RAC）在肋尺度上的粘结滑移机制。首先，开发了用于参数化建模的辅助软件，可即时创建三维肋尺度仿真模型。其次，揭示了内部损伤沿纵向和横向的发展规律，详细分析了肋骨的开口位移、界面压力和应力。然后，进行了参数研究和机理分析。随着锚固长度、肋间距和置换率的增加，粘结强度降低，但随着肋高和保护层相对厚度的增加，粘结强度增加。肋条与轴线之间的夹角呈二次函数关系。肋侧的倾斜角在峰值之后有影响。最后，考虑到肋的尺寸，提出了 RAC 中钢筋极限粘结强度和残余粘结强度的经验模型。

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 building engineering Engineering-Civil and Structural Engineering

CiteScore

10.00

自引率

12.50%

发文量

1901

审稿时长

35 days

期刊介绍： The Journal of Building Engineering is an interdisciplinary journal that covers all aspects of science and technology concerned with the whole life cycle of the built environment; from the design phase through to construction, operation, performance, maintenance and its deterioration.