Article(id=1322636313078120689, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322636274364698818, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20200049, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1580400000000, receivedDateStr=2020-01-31, revisedDate=1583683200000, revisedDateStr=2020-03-09, acceptedDate=null, acceptedDateStr=null, onlineDate=1793270670431, onlineDateStr=2026-10-29, pubDate=1605801600000, pubDateStr=2020-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793270670431, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793270670431, creator=13701087609, updateTime=1793270670431, updator=13701087609, issue=Issue{id=1322636274364698818, tenantId=1146029695717560320, journalId=1263187385517883426, year='2020', volume='48', issue='11', pageStart='1689', pageEnd='1864', issueExtLink='null', onlineDate='null', pubDate='1605801600000', pubDateStr='2020-11-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793270661202, creator='13701087609', updateTime=1793277186220, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322663642319930111, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322636274364698818, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322663642319930112, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322636274364698818, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1740, endPage=1746, ext={EN=ArticleExt(id=1322636314827145458, articleId=1322636313078120689, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Scale Effect of Flexural Strength on Ultra-high Performance Concrete, columnId=1322636275505549507, journalTitle=Journal of the Chinese Ceramic Society, columnName=Special Issue for Ultra-high Performance Concrete Ⅱ, runingTitle=null, highlight=null, articleAbstract=

The flexural strength of ultra-high performance concrete prism specimens with three kinds of strength grades, two types of steel fibers and four groups of fiber contents was determined to investigate the effects of strength grade, steel fiber and fiber content on the flexural strength and its size effect of ultra-high performance concrete. The results show that the size effect of the flexural strength becomes more obvious as the strength grade increases. The scale effect of the flexural strength of the specimen with a strength grade of R160 is 1.26 times greater than that of the specimen with a strength grade of R120. The content of steel fiber has an effect on the size effect of the flexural strength. The larger the content of steel fiber is, the more pronounced the size effect will be. The flexural strength of specimens with straight fiber and hook fiber and strength grade of R120 at a fiber content 3% (volume fraction) is 71% and 78% greater than that of the specimens without steel fiber reinforcement, respectively. The size conversion factor for the flexural strength of ultra-high performance concrete with different strength grades was given. The calculation formulas for the size effect law of the flexural strength of ultra-high performance concrete were proposed.

, authors=Jie SU1, 2, Caijun SHI1, 2, Hongjie QIN1, Xiang ZHANG1, authorsList=Jie SU, Caijun SHI, Hongjie QIN, Xiang ZHANG, authorCompany=null, correspAuthors=null, authorNote=

SU Jie (1979-), male, Ph. D., Associate Professor. E-mail:

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通过3个强度等级、2种钢纤维类型和4组钢纤维掺量超高性能混凝土(UHPC)小梁试件的抗折试验,研究了强度等级、钢纤维类型和体积掺量对超高性能混凝土抗折强度及尺寸效应的影响。结果表明:随UHPC强度等级的增加,小梁试件抗折强度尺寸效应趋于明显,R160级试件抗折强度尺寸效应约为R120试件的1.26倍。钢纤维掺量对UHPC抗折强度尺寸效应有较大影响,钢纤维掺量越大,尺寸效应越明显,掺入3%(体积分数)平直型钢纤维和端勾型钢纤维的R120级UHPC小梁试件抗折强度尺寸效应比未掺加钢纤维的试件提高了71%和78%。建议了UHPC抗折强度尺寸换算系数,提出了UHPC抗折强度尺寸效应律计算公式。

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苏捷(1979—),男,博士,副教授。

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超高性能混凝土抗折强度尺寸效应
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苏捷 1, 2 , 史才军 1, 2 , 秦红杰 1 , 张祥 1
硅酸盐学报 | 超高性能混凝土专题Ⅱ 2020,48(11): 1740-1746
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硅酸盐学报 |超高性能混凝土专题Ⅱ 2020 , 48 (11) : 1740 -1746
超高性能混凝土抗折强度尺寸效应
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苏捷1, 2 , 史才军1, 2, 秦红杰1, 张祥1
作者信息
  • 1.湖南大学绿色先进土木工程材料及应用技术湖南省重点实验室,长沙 410082
  • 2.湖南大学土木工程学院,长沙 410082
作者简介:

苏捷(1979—),男,博士,副教授。

Scale Effect of Flexural Strength on Ultra-high Performance Concrete
Jie SU1, 2 , Caijun SHI1, 2, Hongjie QIN1, Xiang ZHANG1
Affiliations
  • 1.Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, Hunan University, Changsha 410082, China
  • 2.College of Civil Engineering, Hunan University, Changsha 410082, China
  • SU Jie (1979-), male, Ph. D., Associate Professor. E-mail:

出版时间: 2020-11-20 doi: 10.14062/j.issn.0454-5648.20200049
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通过3个强度等级、2种钢纤维类型和4组钢纤维掺量超高性能混凝土(UHPC)小梁试件的抗折试验,研究了强度等级、钢纤维类型和体积掺量对超高性能混凝土抗折强度及尺寸效应的影响。结果表明:随UHPC强度等级的增加,小梁试件抗折强度尺寸效应趋于明显,R160级试件抗折强度尺寸效应约为R120试件的1.26倍。钢纤维掺量对UHPC抗折强度尺寸效应有较大影响,钢纤维掺量越大,尺寸效应越明显,掺入3%(体积分数)平直型钢纤维和端勾型钢纤维的R120级UHPC小梁试件抗折强度尺寸效应比未掺加钢纤维的试件提高了71%和78%。建议了UHPC抗折强度尺寸换算系数,提出了UHPC抗折强度尺寸效应律计算公式。

超高性能混凝土  /  抗折强度  /  尺寸效应  /  钢纤维

The flexural strength of ultra-high performance concrete prism specimens with three kinds of strength grades, two types of steel fibers and four groups of fiber contents was determined to investigate the effects of strength grade, steel fiber and fiber content on the flexural strength and its size effect of ultra-high performance concrete. The results show that the size effect of the flexural strength becomes more obvious as the strength grade increases. The scale effect of the flexural strength of the specimen with a strength grade of R160 is 1.26 times greater than that of the specimen with a strength grade of R120. The content of steel fiber has an effect on the size effect of the flexural strength. The larger the content of steel fiber is, the more pronounced the size effect will be. The flexural strength of specimens with straight fiber and hook fiber and strength grade of R120 at a fiber content 3% (volume fraction) is 71% and 78% greater than that of the specimens without steel fiber reinforcement, respectively. The size conversion factor for the flexural strength of ultra-high performance concrete with different strength grades was given. The calculation formulas for the size effect law of the flexural strength of ultra-high performance concrete were proposed.

ultra-high performance concrete  /  flexural strength  /  size effect  /  steel fiber
苏捷, 史才军, 秦红杰, 张祥. 超高性能混凝土抗折强度尺寸效应. 硅酸盐学报, 2020 , 48 (11) : 1740 -1746 . DOI: 10.14062/j.issn.0454-5648.20200049
Jie SU, Caijun SHI, Hongjie QIN, Xiang ZHANG. Scale Effect of Flexural Strength on Ultra-high Performance Concrete[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (11) : 1740 -1746 . DOI: 10.14062/j.issn.0454-5648.20200049
  • 国家重点研发计划项目(2018YFC0705400)
  • 国家自然科学基金项目(51408213)
  • 湖南省自然科学基金项目(2018JJ2042)
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2020年第48卷第11期
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doi: 10.14062/j.issn.0454-5648.20200049
  • 接收时间:2020-01-31
  • 首发时间:2026-10-29
  • 出版时间:2020-11-20
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  • 收稿日期:2020-01-31
  • 修回日期:2020-03-09
基金
国家重点研发计划项目(2018YFC0705400)
国家自然科学基金项目(51408213)
湖南省自然科学基金项目(2018JJ2042)
作者信息
    1.湖南大学绿色先进土木工程材料及应用技术湖南省重点实验室,长沙 410082
    2.湖南大学土木工程学院,长沙 410082
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
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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