水力发电2026，Vol.52Issue(5)：75-82,8.
基于离散元法的沥青混凝土心墙与过渡层接触面剪切作用机制研究
Shear Mechanism of Contact Surface between Asphalt Concrete Core Wall and Transition Layer Based on Discrete Element Method
张立建 1孔锐 2陈健 1赵尉博 3杨金龙 1柏晨爽 2张振亚2
作者信息
- 1. 中核新华黄龙抽水蓄能发电有限公司,甘肃 天水 741000
- 2. 中国电建集团西北勘测设计研究院有限公司,陕西 西安 710054
- 3. 西安理工大学水利水电学院,陕西 西安 710048
- 折叠
摘要
Abstract
The contact surface between the asphalt concrete core wall and the transition layer is a key weak zone.In this study,a mesoscopic numerical model of the contact surface between the asphalt concrete core wall and the transition layer is established using discrete element software PFC.By simulating multi-ring shear tests,the shear mechanism of the contact surface is investigated.The mesoscopic contact parameters are calibrated based on actual experimental data,verifying the consistency between the numerical model and laboratory test results.Through analysis of force chain evolution,particle displacement and rotation characteristics during shearing,the mechanical response mechanism of the contact surface at different shear stages is revealed.The results indicate that:(a)the shear resistance of the contact surface is closely related to the force chain network,and with the increase of normal pressure,the strong force chains gradually form and enhance the interface strength;(b)during shearing,the particle displacement progresses from local compression to global slippage,forming a distinct shear band.;and(c)under high normal stress,the interface failure manifests as the propagation of slippage bands and displacement concentration.关键词
沥青混凝土心墙/过渡料/接触面/力学性能/颗粒破碎/孔隙分布/PFCKey words
asphalt concrete core wall/transition material/contact surface/mechanical properties/particle breakage/pore distribution/PFC分类
建筑与水利引用本文复制引用
张立建,孔锐,陈健,赵尉博,杨金龙,柏晨爽,张振亚..基于离散元法的沥青混凝土心墙与过渡层接触面剪切作用机制研究[J].水力发电,2026,52(5):75-82,8.
