含层状节理岩体力学性质数值模拟研究

doi:10.6040/j.issn.1672-3961.0.2019.393

摘要/Abstract

摘要：

采用GDEM软件分析不同角度下平行层状节理岩体力学性质，探讨节理角度与加载方向夹角的变化对试件破坏模式的影响，采用工程常见的不同层间岩体材料建立平行层状节理模型，通过静载单轴压缩、双轴压缩和纯剪切3种加载方式，分析此类岩体模型在不同倾斜角度情况下破坏形式、加载过程应力应变关系和峰值载荷变化趋势。分析结果表明平行层次节理岩体的力学性质和峰值强度与节理倾角有直接关系，并通过模拟发现在3种加载情况下平行层次节理岩体表现出明显的弹脆性力学的特点。

关键词: 节理, 离散元方法, 破坏模式, 力学性质, 各向异性

Abstract:

GDEM software was used to analyze the mechanical properties of parallel layered jointed rock masses from different angles, and explore the influence of the change of the angle between the joint angle and the loading direction on the failure mode of the specimen, the parallel layered joint model was established by using different interlayer rock materials commonly in engineering. Through three loading methods, such as static load uniaxial compression, biaxial compression and pure shear, failure forms of such rock mass model at different inclined angles, the stress-strain relationship in the loading process and the variation trend of peak load were analyzed. This study found that the mechanical properties and peak strength of the parallel-level jointed rock mass were directly related to the joint inclination angle. It was found by simulation that the parallel-level jointed rock mass obvious elastic-brittle mechanics under three loading conditions.

Key words: joints, discrete element method, failure mode, mechanical properties, anisotropy

中图分类号:

TU45

徐子瑶,虞松,付强. 含层状节理岩体力学性质数值模拟研究[J]. 山东大学学报 (工学版), 2020, 50(3): 66-72.

Ziyao XU,Song YU,Qiang FU. Numerical simulation of mechanical properties of layered jointed rock mass[J]. Journal of Shandong University(Engineering Science), 2020, 50(3): 66-72.

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介质	密度/(kN·m^-3)	弹性模量/GPa	泊松比	内摩擦角/(°)	粘聚力/MPa
泥岩	14	30	0.3	30	7.3
砂岩	25	12	0.25	40	4.2
石灰岩	22	37	0.4	37	4.0
节理	10	10	0.1	20	0.6

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