期刊论文

NUMERICAL ANALYSIS FOR DIRECT SHEAR TEST OF BOLTED JOINT BASED ON PARTICLE FLOW CODE

中文

工程地质学报

1004-9665

2019

27

2

302-310

10.13544/j.cnki.jeg.2017-564

51774322:国家自然科学基金 51474249:国家自然科学基金

本校为其他机构

为探究锚固节理在直剪加载作用下的细观力学响应,利用颗粒流数值计算方法建立不同锚固角度下的锚固节理数值模型,并进行不同法向荷载下的直剪试验。之后,通过分析和对比剪切-位移曲线和峰值剪切强度来对锚固节理宏观力学性质进行研究。与此同时,基于微裂纹分布规律,从细观角度揭示了剪切荷载下不同锚固角度的岩石节理面的破坏特征;研究结果显示。(1)不同于非锚固节理,锚固节理的剪切-位移曲线在剪切后期呈现出一定的增长趋势,且粗糙度不同曲线变化特征存在一定的差异。(2)不同锚固角度下,锚固节理的破坏模式存在着较为明显的差异。当锚固角为90°时,锚固节理模型的破坏主要集中于锚杆与上下节理...

This paper investigates the micro-mechanical response of supported joint under direct shear loading with the particle flow code. It builts the supported joint and unsupported joint numerical model successfully. It investigates the mechanical properties and failure mode of supported joint under direct shear tests and under different normal stresses. At the same time,based on the shear-displacement curve and peak shear strength of the numerical model,it investigates the macro-mechanical properties. Moreover,the failure characteristics of the bolt...