Article(id=1223196805106618868, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20221347, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1656604800000, receivedDateStr=2022-07-01, revisedDate=1665936000000, revisedDateStr=2022-10-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1769562444234, onlineDateStr=2026-01-28, pubDate=1692892800000, pubDateStr=2023-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769562444234, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769562444234, creator=13701087609, updateTime=1769562444234, updator=13701087609, issue=Issue{id=1223196803663778281, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='8', pageStart='1', pageEnd='222', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769562443888, creator=13701087609, updateTime=1769563793740, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223202465391166440, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223202465391166441, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=156, endPage=160, ext={EN=ArticleExt(id=1223196806780146177, articleId=1223196805106618868, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Research on Meso Parameters of Concrete Direct Shear Test Based on Discrete Element Simulation, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

The shear performance of heterogeneous concrete is very important. In this paper, the parallel bonding model of particle discrete element was used to simulate the direct shear test process of concrete to reveal the shear characteristic and failure mechanism of concrete. The impacts of meso parameters, such as contact modulus, contact stiffness ratio, particle friction coefficient, tensile strength, ratio of cohesive strength to tensile strength, and contact friction angle, on the results of concrete direct shear test results were studied by controlling the variable parameters. The shear deformation resistance of specimen has a significant linear relationship with the contact elastic modulus. The contact stiffness ratio has little impact on the shear test results. Particle friction coefficient, contact tensile strength, ratio between cohesion strength and tensile strength, and contact friction angle have a significant effect on the shear strength parameters. Contact tensile strength, ratio between cohesion strength and tensile strength, and contact friction angle could affact the curve form after peak of shear stress vs. horizontal displacement. This paper provided a reference for particle discrete element simulation of direct shear test of concrete specimens.

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非均质材料混凝土的剪切性能十分重要,为揭示混凝土抗剪性能和破坏机理,采用颗粒离散元的平行黏结模型模拟混凝土的直剪试验过程,通过控制变量法,研究了接触模量、接触刚度比、颗粒摩擦系数、抗拉强度、黏聚强度与抗拉强度比、接触摩擦角等细观参数对混凝土直剪试验结果的影响。结果表明,试件抵抗剪切变形能力与接触弹模有显著的线性关系,接触刚度比对剪切试验结果的影响较小;颗粒摩擦系数、接触抗拉强度、黏聚强度与抗拉强度比、接触摩擦角对剪切强度参数的摩擦系数和粘聚力影响显著;接触抗拉强度、黏聚强度与抗拉强度比、接触摩擦角影响剪切应力与水平位移关系曲线的峰值后形式。研究结果为混凝土试件直剪试验的颗粒离散元模拟提供了参考。

, correspAuthors=null, authorNote=null, correspAuthorsNote=
徐千军(1967-),男,博士、教授、博导,研究方向为混凝土与水工结构等,E-mail:
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覃茜(1993-),女,博士、工程师,研究方向为混凝土与水工结构等,E-mail:

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覃茜(1993-),女,博士、工程师,研究方向为混凝土与水工结构等,E-mail:

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基于离散元模拟的混凝土直剪试验细观参数研究
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覃茜 1, 2 , 徐千军 2
水电能源科学 | 水利水电工程 2023,41(8): 156-160
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水电能源科学 | 水利水电工程 2023, 41(8): 156-160
基于离散元模拟的混凝土直剪试验细观参数研究
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覃茜1, 2 , 徐千军2
作者信息
  • 1.长江科学院材料与结构研究所,湖北 武汉 430010
  • 2.清华大学水沙科学与水利水电工程国家重点实验室,北京 100084
  • 覃茜(1993-),女,博士、工程师,研究方向为混凝土与水工结构等,E-mail:

通讯作者:

徐千军(1967-),男,博士、教授、博导,研究方向为混凝土与水工结构等,E-mail:
Research on Meso Parameters of Concrete Direct Shear Test Based on Discrete Element Simulation
Xi QIN1, 2 , Qian-jun XU2
Affiliations
  • 1.Department of Material and Structure, Changjiang River Scientific Research Institute, Wuhan 430010, China
  • 2.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
出版时间: 2023-08-25 doi: 10.20040/j.cnki.1000-7709.2023.20221347
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非均质材料混凝土的剪切性能十分重要,为揭示混凝土抗剪性能和破坏机理,采用颗粒离散元的平行黏结模型模拟混凝土的直剪试验过程,通过控制变量法,研究了接触模量、接触刚度比、颗粒摩擦系数、抗拉强度、黏聚强度与抗拉强度比、接触摩擦角等细观参数对混凝土直剪试验结果的影响。结果表明,试件抵抗剪切变形能力与接触弹模有显著的线性关系,接触刚度比对剪切试验结果的影响较小;颗粒摩擦系数、接触抗拉强度、黏聚强度与抗拉强度比、接触摩擦角对剪切强度参数的摩擦系数和粘聚力影响显著;接触抗拉强度、黏聚强度与抗拉强度比、接触摩擦角影响剪切应力与水平位移关系曲线的峰值后形式。研究结果为混凝土试件直剪试验的颗粒离散元模拟提供了参考。

混凝土  /  离散元模型  /  细观参数  /  剪切强度  /  破坏形式

The shear performance of heterogeneous concrete is very important. In this paper, the parallel bonding model of particle discrete element was used to simulate the direct shear test process of concrete to reveal the shear characteristic and failure mechanism of concrete. The impacts of meso parameters, such as contact modulus, contact stiffness ratio, particle friction coefficient, tensile strength, ratio of cohesive strength to tensile strength, and contact friction angle, on the results of concrete direct shear test results were studied by controlling the variable parameters. The shear deformation resistance of specimen has a significant linear relationship with the contact elastic modulus. The contact stiffness ratio has little impact on the shear test results. Particle friction coefficient, contact tensile strength, ratio between cohesion strength and tensile strength, and contact friction angle have a significant effect on the shear strength parameters. Contact tensile strength, ratio between cohesion strength and tensile strength, and contact friction angle could affact the curve form after peak of shear stress vs. horizontal displacement. This paper provided a reference for particle discrete element simulation of direct shear test of concrete specimens.

concrete  /  discrete element model  /  meso parameters  /  shear strength  /  damage form
覃茜, 徐千军. 基于离散元模拟的混凝土直剪试验细观参数研究. 水电能源科学, 2023 , 41 (8) : 156 -160 . DOI: 10.20040/j.cnki.1000-7709.2023.20221347
Xi QIN, Qian-jun XU. Research on Meso Parameters of Concrete Direct Shear Test Based on Discrete Element Simulation[J]. Water Resources and Power, 2023 , 41 (8) : 156 -160 . DOI: 10.20040/j.cnki.1000-7709.2023.20221347
  • 国家自然科学基金项目(52009011; 52090084)
  • 湖北省自然科学基金项目(2021CFB154)
  • 武汉市科技知识创新项目(CKSD2023556/CL)
2023年第41卷第8期
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doi: 10.20040/j.cnki.1000-7709.2023.20221347
  • 接收时间:2022-07-01
  • 首发时间:2026-01-28
  • 出版时间:2023-08-25
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出版历史
  • 收稿日期:2022-07-01
  • 修回日期:2022-10-17
基金
国家自然科学基金项目(52009011; 52090084)
湖北省自然科学基金项目(2021CFB154)
武汉市科技知识创新项目(CKSD2023556/CL)
作者信息
    1.长江科学院材料与结构研究所,湖北 武汉 430010
    2.清华大学水沙科学与水利水电工程国家重点实验室,北京 100084

通讯作者:

徐千军(1967-),男,博士、教授、博导,研究方向为混凝土与水工结构等,E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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