[Poster Presentation]考虑破碎效应的堆石料压缩特性颗粒流模拟研究

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

考虑破碎效应的堆石料压缩特性颗粒流模拟研究

ID：76 Submission ID：5 View Protection：ATTENDEE Updated Time：2024-04-09 22:37:10 Hits：437 Poster Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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Abstract

堆石料是堆石坝和高填方工程地基的主要填筑料，按来源可分为磨圆度较好的砂砾石和棱角突出的爆破料。这两类料在形状、破碎特性等方面有显著区别。本文根据实际工程的两类料形状建立三维颗粒流模型，从单颗粒压碎、两颗粒咬合和多颗粒侧限压缩三个层面，辅以相关的室内试验数据，对两类料的破碎特征和压缩特性进行全面分析比较。数值模拟结果表明，颗粒形状对破碎模式、侧限压缩曲线的屈服应力和模量均有显著影响；在本文讨论的试验中，砂砾石和爆破料的屈服应力分别为单颗粒特征强度的25%和35%；破碎导致的刚度折减与破碎模式密切相关，爆破料表现出明显的棱角破碎，而砂砾石以整体破碎为主，相应的刚度参数分别为3.57和1.24。本文颗粒流模拟的相关结论可为深入认识堆石料破碎特性提供一定参考。堆石料是堆石坝和高填方工程地基的主要填筑料，按来源可分为磨圆度较好的砂砾石和棱角突出的爆破料。这两类料在形状、破碎特性等方面有显著区别。本文根据实际工程的两类料形状建立三维颗粒流模型，从单颗粒压碎、两颗粒咬合和多颗粒侧限压缩三个层面，辅以相关的室内试验数据，对两类料的破碎特征和压缩特性进行全面分析比较。数值模拟结果表明，颗粒形状对破碎模式、侧限压缩曲线的屈服应力和模量均有显著影响；在本文讨论的试验中，砂砾石和爆破料的屈服应力分别为单颗粒特征强度的25%和35%；破碎导致的刚度折减与破碎模式密切相关，爆破料表现出明显的棱角破碎，而砂砾石以整体破碎为主，相应的刚度参数分别为3.57和1.24。本文颗粒流模拟的相关结论可为深入认识堆石料破碎特性提供一定参考。

Keywords

堆石料；形状；破碎；颗粒流；侧限试验

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