Stress wave transmission across a filled joint with different loading/unloading behavior
Stress wave transmission across a filled joint with different loading/unloading behavior
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DOI：
10.1016/j.ijrmms.2012.12.046
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发表时间：
2013-06-01
影响因子：
7.2
通讯作者：
Wong, L. N. Y.
中科院分区：
文献类型：
--
作者：
Fan, L. F.;Wong, L. N. Y.
本文对具有不同加载/卸载特性的岩石节理中应力波的传播进行了理论研究。引入了两个Bandis-Barton （B-B）模型，分别描述了岩石节理在加载和卸载情况下的应力闭合关系。提出了一种研究应力波传播的特征方法。分析了卸载效应对能量传输的幅值依赖性和频率依赖性。分析了不同波形应力波和多正数应力波的卸载效应。结果表明，特征值法可用于研究不同加卸载特性岩石节理中波浪的传播规律。卸载行为对能量传输的影响是幅值和频率相关的。矩形波形的应力波受卸荷特性的影响小于其他波形的应力波。卸载行为对单脉冲和多脉冲应力波的能量传递都有显著影响。但在多脉冲应力波时间间隔足够小的情况下，卸荷行为对波的衰减有影响。(C) 2013 Elsevier Ltd.版权所有。
This paper presents a theoretical study of stress wave propagation across a rock joint with different loading/unloading behavior. Two Bandis-Barton (B-B) models are introduced to describe the stress-closure relationships of a rock joint under loading and unloading situations, respectively. A characteristics method is proposed to investigate the stress wave transmission. Amplitude-dependence and frequency-dependence of unloading effect on the energy transmission are analyzed. The unloading effect on stress waves with different waveforms and stress waves with multiple pluses are evaluated. The results show that the characteristics method can be used to investigate the wave propagation across a rock joint with different loading/unloading behavior. The effect of unloading behavior on energy transmission is amplitude- and frequency-dependent. The stress wave with a rectangular waveform is less influenced by the unloading behavior than the stress waves with other waveforms. Unloading behavior has a significant effect on the energy transmission for the stress wave with both single pulse and multiple pulses. However, unloading behavior has an effect on the wave attenuation provided that the time interval of multiple pulses stress wave is sufficiently small. (C) 2013 Elsevier Ltd. All rights reserved.