粗糙界面岩石-混凝土组合体的压缩破坏标准和特征研究

IF 4.7 2区 工程技术 Q1 MECHANICS
Zhibiao Guo , Jingwei Gao , Jinglin You
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引用次数: 0

摘要

岩石与混凝土衬砌结构的组合是工程领域典型的复合结构。本研究基于等效应变能的概念,建立了岩石-混凝土组合结构(RCA)的力学等效模型。假设岩石和混凝土都满足莫尔-库仑准则,考虑到岩石-混凝土界面的粗糙度,我们推导出了等效模型的剪切破坏准则。通过对八种不同类型的 RCA 结构进行单轴和三轴试验,验证了该模型的适用性。研究结果表明,约束压力的增加会增强 RCA 的强度。当约束压力达到一定值时,混凝土只会出现剪切破坏,岩石不会出现宏观裂缝。RCA 的结构趋于各向同性。随着 RCA 高度比的增加,其强度也随之降低。在混凝土高度比最小时,RCA 的强度逐渐接近混凝土的强度。这项研究可为设计和评估不同地质环境下工程岩体的稳定性提供有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on compression failure criteria and characteristics of rock-concrete assemblies with rough interfaces
The combination of rock and concrete lining structures is a typical composite structure in the field of engineering. This study is based on the concept of equivalent strain energy and establishes a mechanical equivalent model for rock-concrete assemblies (RCA). Assuming that both rock and concrete satisfy the Mohr-Coulomb criterion, we derive the shear failure criterion of the equivalent model considering the roughness of the rock-concrete interface. The applicability of the model was verified through uniaxial and triaxial tests on eight different types of RCA structures. The research results indicate that an increase in confining pressure enhances the strength of the RCA. When the confining pressure reaches a certain value, concrete only experiences shear failure, and no macroscopic cracks appear in the rock. The structure of the RCA tends towards isotropy. As the height ratio of the RCA increases, its strength decreases. At minimal concrete height ratios, the strength of the RCA gradually approaches that of concrete. This study can provide valuable insights for designing and evaluating stability in engineering rock bodies within diverse geological environments.
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来源期刊
CiteScore
8.70
自引率
13.00%
发文量
606
审稿时长
74 days
期刊介绍: EFM covers a broad range of topics in fracture mechanics to be of interest and use to both researchers and practitioners. Contributions are welcome which address the fracture behavior of conventional engineering material systems as well as newly emerging material systems. Contributions on developments in the areas of mechanics and materials science strongly related to fracture mechanics are also welcome. Papers on fatigue are welcome if they treat the fatigue process using the methods of fracture mechanics.
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