Influence of loading rate on the deformation characteristics of single-fracture rock-like models

SU Zhan-dong; TANG Ning-ming; YIN Qian; TAO Zhi-gang; WANG Hong; GAN Fei

doi:10.16285/j.rsm.2025.00355

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Influence of loading rate on the deformation characteristics of single-fracture rock-like models

更新时间：2026-08-04

- Influence of loading rate on the deformation characteristics of single-fracture rock-like models
- Vol. 47, Issue 7, (2026)
- 作者机构：
  
  1. ．防灾科技学院防灾减灾工程学院,河北,三河,065201
  2. ．河北省地震灾害防御与风险评估重点实验室,河北,三河,065201
  3. ．中国矿业大学深地工程智能建造与健康运维全国重点实验室,江苏,徐州,221116
  4. ．中国矿业大学（北京）隧道工程灾变防控与智能建养全国重点实验室,北京,100083
  5. ．中国矿业大学（北京）力学与土木工程学院,北京,100083
  6. ．贵州大学土木工程学院,贵州,贵阳,550025
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2025.00355
  CLC：
- Online First：08 July 2026，
  
  Published：2026
- 稿件说明：
移动端阅览
SU Zhan-dong, TANG Ning-ming, YIN Qian, et al. Influence of loading rate on the deformation characteristics of single-fracture rock-like models[J]. 2026, 47(7).
DOI：

SU Zhan-dong, TANG Ning-ming, YIN Qian, et al. Influence of loading rate on the deformation characteristics of single-fracture rock-like models[J]. 2026, 47(7). DOI： 10.16285/j.rsm.2025.00355.

摘要

裂隙岩体的变形行为常常是引起工程岩体失稳和地质灾害频发的关键因素，而工程岩体所受荷载作用的复杂变化会触发和改变岩体变形破裂等力学响应过程。通过类岩体模型对真实岩体进行物理模拟，利用河砂、水泥、石膏和腻子粉制备含相同性状的单裂隙类岩体模型，开展加载速率影响单裂隙类岩体模型变形行为的单轴压缩试验，关注裂隙两侧介质滑移变形规律和与预制裂隙相关的破裂行为，同步使用嵌入式应变砖与数字图像技术，分别监测模型内外部变形演化过程，探究加载速率对裂隙端部变形特性和模型表面破裂行为的影响。结果表明：（1）随着加载速率增加，模型由延性破坏向脆性破坏转变，其反映了在不同加载速率下岩体承载结构调整模式的差异；（2）应变局部化启动时间与速率无关，加载速率增加模型拉压应力区应变偏转角由异步振荡转变为同步振荡；（3）低加载速率下模型破坏模式稳定，随着加载速率增加破坏模式复杂化，表面裂纹密度增加，加载速率超过一定阈值时模型破坏模式转为“X型”剪切破坏。（4）裂隙滑动速率与端部主应变偏转角有显著相关性，反映了Griffith准则下岩体损伤与应变场演化的耦合作用。

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