[Poster Presentation]基于离散元方法的间断级配土峰值强度机理及预测研究

Organized By

Hohai University

Monash University

Co-organized by

Southeast University

Jiangxi University of Science and Technology

Northeast University

DUT-BSU Scientific Research and Innovation Center

Suzhou University of Science and Technology

State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment

Sponsoring agency

KELI SDEM Software (Dalian) Co., Ltd.

Sugon Smart Computing Information Technology Co., Ltd.

Beijing Paratera Technology Co., Ltd.

Simpop Information Technology Co., Ltd.

Important Dates

Conference Announcement

December 2023, release First Round Announcement
Abstract Submission Deadline
March 31^th, 2024
Paper Submission Deadline
April 30^th, 2024
Registration
From January 1^st, 2024
Conference Schedule
May 31^st (Friday), 2024 On-Site Registration
June 1^st to 3^rd, 2024 Conference

基于离散元方法的间断级配土峰值强度机理及预测研究

ID：166 Submission ID：255 View Protection：ATTENDEE Updated Time：2024-04-10 17:24:00 Hits：518 Poster Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

Session：[No Session] » [No Session Block]

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Abstract

间断级配土广泛存在于基础工程及水利工程中，不同围压（P）、粒径比（SR）及细粒含量（FC）是影响间断级配土力学性能变化的重要因素。本文采用离散元方法，通过重构试样法建立不同粒径比与细粒含量的间断级配土颗粒模型，在不同围压下模拟常规三轴压缩排水试验，揭示间断级配土在轴向压缩过程中的力学性能演变规律与不同影响因素下的峰值强度变化，从颗粒接触各项异性的角度解释试样峰值强度差异的原因。结果表明，围压单独影响间断级配土的峰值强度，粒径比和细粒含量对试样峰值强度有强耦合关系。存在一个界限粒径比，小于界限粒径比时，间断级配土峰值强度不随细粒含量的增减而变化。当粒径比大于等于界限粒径比时，间断级配土的峰值强度随细粒含量增加呈先增加后减少的趋势，达到峰值时的细粒含量为25%左右。从微观上看，间断级配土的峰值强度与结构各向异性参数正相关。此外，峰值强度较大时，颗粒细-细、细-粗、粗-粗颗粒间法向接触力大小分布更加均匀。最后，本文提出了根据围压、粒径比和细粒含量预测峰值摩擦角的计算公式与变量参考范围，为涉及间断级配土的工程设计提供参考。

Keywords

离散元法；间断级配土；峰值强度；宏观和微观参数；预测公式

Speaker

胡凌恺

浙江工业大学

Submission Author

胡凌恺浙江工业大学

徐山琳浙江工业大学

Sponsored By

Hohai University

Panel of Computational Mechanics on Granular Materials, Working Party of Computational Mechanics, Chinese Society of Theoretical and Applied Mechanics

Jiangsu Society of Theoretical and Applied Mechanics