Article(id=1223201269448294661, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223201250133524577, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20221459, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1657814400000, receivedDateStr=2022-07-15, revisedDate=1663084800000, revisedDateStr=2022-09-14, acceptedDate=null, acceptedDateStr=null, onlineDate=1769563508617, onlineDateStr=2026-01-28, pubDate=1690214400000, pubDateStr=2023-07-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769563508617, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769563508617, creator=13701087609, updateTime=1769563508617, updator=13701087609, issue=Issue{id=1223201250133524577, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='7', pageStart='1', pageEnd='220', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769563504012, creator=13701087609, updateTime=1769563583713, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223201584469885927, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223201250133524577, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223201584469885928, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223201250133524577, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=180, endPage=183, ext={EN=ArticleExt(id=1223201270295544130, articleId=1223201269448294661, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Damage Rate Effect of Hydraulic Concrete Based on Acoustic Emission Parameters, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

In order to study the influence of loading rate on the damage evolution of hydraulic concrete, notched cubic specimens with side lengths of 300 mm and 450 mm were tested by wedge splitting test with different loading rates of 0.1 mm/s, 0.01 mm/s, 0.001 mm/s. Acoustic emission technology was used to monitor the acoustic emission signals of concrete in the damage process. Test results show that the variation of AE event rate during failure process of concrete can be divided into quiet, active, and attenuation period, among these the active period increases with the decrease of loading rate. The damage was defined according to the AE events, and it is found that the damage process of hydraulic concrete can be divided into three stages: crack initiation, acceleration and failure. The smaller the loading rate is, the faster the growth rate of the acceleration stage is. The damage evolution model based on the AE event obeys Weibull distribution, which can better reflect the influence of loading rates on the damage evolution of hydraulic concrete.

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为研究加载速率对水工混凝土损伤演化特性的影响,对两种尺寸的带缺口水工混凝土立方体试件(边长为300、450 mm)进行不同加载速率(0.1、0.01、0.001 mm/s)下楔入劈拉试验,并采用声发射技术监测混凝土在破坏过程中的声发射信号。结果表明,在混凝土破坏过程中声发射事件率的变化可分为平静期、活跃期和衰减期,且随加载速率降低,活跃期增长。根据声发射事件数定义的损伤变量将水工混凝土的损伤过程分为裂缝萌生阶段、裂缝加速扩展阶段和破坏阶段三个阶段。加载速率越小,损伤第二阶段增长速率越快。基于声发射事件数建立的损伤演化模型服从Weibull分布,该模型能较好地反映混凝土在不同加载速率下的损伤演化特征。

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卜静武(1988-),女,博士、讲师、硕导,研究方向为水工混凝土静动态力学特性,E-mail:
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陈乾(1999-),男,硕士研究生,研究方向为水工混凝土静动态力学特性,E-mail:

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陈乾(1999-),男,硕士研究生,研究方向为水工混凝土静动态力学特性,E-mail:

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陈乾(1999-),男,硕士研究生,研究方向为水工混凝土静动态力学特性,E-mail:

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基于声发射事件数的水工混凝土损伤率效应研究
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陈乾 , 贾易横 , 陈庆华 , 卜静武 , 徐波
水电能源科学 | 水利水电工程 2023,41(7): 180-183
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水电能源科学 | 水利水电工程 2023, 41(7): 180-183
基于声发射事件数的水工混凝土损伤率效应研究
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陈乾 , 贾易横, 陈庆华, 卜静武 , 徐波
作者信息
  • 扬州大学水利科学与工程学院,江苏 扬州 225009
  • 陈乾(1999-),男,硕士研究生,研究方向为水工混凝土静动态力学特性,E-mail:

通讯作者:

卜静武(1988-),女,博士、讲师、硕导,研究方向为水工混凝土静动态力学特性,E-mail:
Damage Rate Effect of Hydraulic Concrete Based on Acoustic Emission Parameters
Qian CHEN , Yi-heng JIA, Qing-hua CHEN, Jing-wu BU , Bo XU
Affiliations
  • School of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
出版时间: 2023-07-25 doi: 10.20040/j.cnki.1000-7709.2023.20221459
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为研究加载速率对水工混凝土损伤演化特性的影响,对两种尺寸的带缺口水工混凝土立方体试件(边长为300、450 mm)进行不同加载速率(0.1、0.01、0.001 mm/s)下楔入劈拉试验,并采用声发射技术监测混凝土在破坏过程中的声发射信号。结果表明,在混凝土破坏过程中声发射事件率的变化可分为平静期、活跃期和衰减期,且随加载速率降低,活跃期增长。根据声发射事件数定义的损伤变量将水工混凝土的损伤过程分为裂缝萌生阶段、裂缝加速扩展阶段和破坏阶段三个阶段。加载速率越小,损伤第二阶段增长速率越快。基于声发射事件数建立的损伤演化模型服从Weibull分布,该模型能较好地反映混凝土在不同加载速率下的损伤演化特征。

水工混凝土  /  加载速率  /  声发射  /  损伤  /  Weibull分布

In order to study the influence of loading rate on the damage evolution of hydraulic concrete, notched cubic specimens with side lengths of 300 mm and 450 mm were tested by wedge splitting test with different loading rates of 0.1 mm/s, 0.01 mm/s, 0.001 mm/s. Acoustic emission technology was used to monitor the acoustic emission signals of concrete in the damage process. Test results show that the variation of AE event rate during failure process of concrete can be divided into quiet, active, and attenuation period, among these the active period increases with the decrease of loading rate. The damage was defined according to the AE events, and it is found that the damage process of hydraulic concrete can be divided into three stages: crack initiation, acceleration and failure. The smaller the loading rate is, the faster the growth rate of the acceleration stage is. The damage evolution model based on the AE event obeys Weibull distribution, which can better reflect the influence of loading rates on the damage evolution of hydraulic concrete.

hydraulic concrete  /  loading rate  /  acoustic emission  /  damage  /  Weibull distribution
陈乾, 贾易横, 陈庆华, 卜静武, 徐波. 基于声发射事件数的水工混凝土损伤率效应研究. 水电能源科学, 2023 , 41 (7) : 180 -183 . DOI: 10.20040/j.cnki.1000-7709.2023.20221459
Qian CHEN, Yi-heng JIA, Qing-hua CHEN, Jing-wu BU, Bo XU. Damage Rate Effect of Hydraulic Concrete Based on Acoustic Emission Parameters[J]. Water Resources and Power, 2023 , 41 (7) : 180 -183 . DOI: 10.20040/j.cnki.1000-7709.2023.20221459
  • 国家自然科学基金项目(51809227; 52079120)
2023年第41卷第7期
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doi: 10.20040/j.cnki.1000-7709.2023.20221459
  • 接收时间:2022-07-15
  • 首发时间:2026-01-28
  • 出版时间:2023-07-25
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  • 收稿日期:2022-07-15
  • 修回日期:2022-09-14
基金
国家自然科学基金项目(51809227; 52079120)
作者信息
    扬州大学水利科学与工程学院,江苏 扬州 225009

通讯作者:

卜静武(1988-),女,博士、讲师、硕导,研究方向为水工混凝土静动态力学特性,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
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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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