Article(id=1322636297202679897, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322636274364698818, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20200227, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1585497600000, receivedDateStr=2020-03-30, revisedDate=1587484800000, revisedDateStr=2020-04-22, acceptedDate=null, acceptedDateStr=null, onlineDate=1793270666646, onlineDateStr=2026-10-29, pubDate=1605801600000, pubDateStr=2020-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793270666646, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793270666646, creator=13701087609, updateTime=1793270666646, 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=1732, endPage=1739, ext={EN=ArticleExt(id=1322636297416589402, articleId=1322636297202679897, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Flexural Properties of Ultra-high Performance Concrete Under Different Temperatures, columnId=1322636275505549507, journalTitle=Journal of the Chinese Ceramic Society, columnName=Special Issue for Ultra-high Performance Concrete Ⅱ, runingTitle=null, highlight=null, articleAbstract=

The bending properties of ultra-high performance concrete (UHPC) at ambient and low temperatures (i.e., 20 ℃ and-20 ℃) were investigated. The results show that the strength and elastic modulus of UHPC increase with decreasing the temperature, and the strength increases more significantly than the elastic modulus. Compared to the corresponding results at 20 ℃, the cubic compressive strength, the prism compressive strength, the splitting tensile strength, the flexural cracking strength, the flexural limit strength and the elastic modulus of UHPC at -20 ℃ are increased by 7.3%, 8.0%, 10.8%, 13.7%, 9.0% and 4.1%, respectively. The flexural deformability and ductility of UHPC decrease with decreasing the temperature. Compared to the corresponding results at 20 ℃, even though the initial crack strain of UHPC at -20 ℃ is increased by 6.3%, resulting from that the flexural cracking strength of UHPC increases more significantly than its elastic modulus, and the peak strain, limit strain, residual strain and ductility index of UHPC at -20 ℃ are decreased by 2.9%, 8.2%, 5.5% and 6.4%, respectively.

, authors=Zhi FANG1, 2, Shaokun LIU1, Zhengyu HUANG1, Junting CHEN1, authorsList=Zhi FANG, Shaokun LIU, Zhengyu HUANG, Junting CHEN, authorCompany=null, correspAuthors=null, authorNote=

FANG Zhi (1963-), male, Ph.D., Professor. E-mail:

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为明确常温和低温环境下超高性能混凝土(UHPC)材料弯拉性能的不同特征,对-20 ℃和20 ℃两种温度下UHPC的弯曲性能进行了研究。结果表明:随着温度的降低,UHPC的强度和弹性模量均有所提高,且强度的提高幅度更为显著。与20 ℃时的相应值相比,-20 ℃时UHPC的立方体抗压强度、棱柱体抗压强度、劈裂抗拉强度、弯拉开裂强度、弯拉极限强度和轴压弹性模量分别提高了7.3%、8.0%、10.8%、13.7%、9.0%和4.1%;随着温度的降低,UHPC材料的变形性能和延性性能总体上有所降低。与20 ℃时的相应值相比,-20 ℃时虽然由于UHPC的开裂强度较其弹性模量提高的幅度更大使得弯拉试件的初裂应变提高了6.3%,但其峰值应变、极限应变、残余应变以及延性系数则分别降低了2.9%、8.2%、5.5%和6.4%。

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方志(1963—),男,博士,教授。

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不同温度下超高性能混凝土的弯拉性能
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方志 1, 2 , 刘绍琨 1 , 黄政宇 1 , 陈俊廷 1
硅酸盐学报 | 超高性能混凝土专题Ⅱ 2020,48(11): 1732-1739
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硅酸盐学报 |超高性能混凝土专题Ⅱ 2020 , 48 (11) : 1732 -1739
不同温度下超高性能混凝土的弯拉性能
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方志1, 2 , 刘绍琨1, 黄政宇1, 陈俊廷1
作者信息
  • 1.湖南大学土木工程学院,长沙 410082
  • 2.湖南大学风工程与桥梁工程湖南省重点实验室,长沙 410082
作者简介:

方志(1963—),男,博士,教授。

Flexural Properties of Ultra-high Performance Concrete Under Different Temperatures
Zhi FANG1, 2 , Shaokun LIU1, Zhengyu HUANG1, Junting CHEN1
Affiliations
  • 1.College of Civil Engineering, Hunan University, Changsha 410082, China
  • 2.Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha 410082, China
  • FANG Zhi (1963-), male, Ph.D., Professor. E-mail:

出版时间: 2020-11-20 doi: 10.14062/j.issn.0454-5648.20200227
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为明确常温和低温环境下超高性能混凝土(UHPC)材料弯拉性能的不同特征,对-20 ℃和20 ℃两种温度下UHPC的弯曲性能进行了研究。结果表明:随着温度的降低,UHPC的强度和弹性模量均有所提高,且强度的提高幅度更为显著。与20 ℃时的相应值相比,-20 ℃时UHPC的立方体抗压强度、棱柱体抗压强度、劈裂抗拉强度、弯拉开裂强度、弯拉极限强度和轴压弹性模量分别提高了7.3%、8.0%、10.8%、13.7%、9.0%和4.1%;随着温度的降低,UHPC材料的变形性能和延性性能总体上有所降低。与20 ℃时的相应值相比,-20 ℃时虽然由于UHPC的开裂强度较其弹性模量提高的幅度更大使得弯拉试件的初裂应变提高了6.3%,但其峰值应变、极限应变、残余应变以及延性系数则分别降低了2.9%、8.2%、5.5%和6.4%。

超高性能混凝土  /  低温  /  弯拉强度  /  变形  /  延性系数

The bending properties of ultra-high performance concrete (UHPC) at ambient and low temperatures (i.e., 20 ℃ and-20 ℃) were investigated. The results show that the strength and elastic modulus of UHPC increase with decreasing the temperature, and the strength increases more significantly than the elastic modulus. Compared to the corresponding results at 20 ℃, the cubic compressive strength, the prism compressive strength, the splitting tensile strength, the flexural cracking strength, the flexural limit strength and the elastic modulus of UHPC at -20 ℃ are increased by 7.3%, 8.0%, 10.8%, 13.7%, 9.0% and 4.1%, respectively. The flexural deformability and ductility of UHPC decrease with decreasing the temperature. Compared to the corresponding results at 20 ℃, even though the initial crack strain of UHPC at -20 ℃ is increased by 6.3%, resulting from that the flexural cracking strength of UHPC increases more significantly than its elastic modulus, and the peak strain, limit strain, residual strain and ductility index of UHPC at -20 ℃ are decreased by 2.9%, 8.2%, 5.5% and 6.4%, respectively.

ultra-high performance concrete  /  low temperature  /  flexural strength  /  deformability  /  ductility index
方志, 刘绍琨, 黄政宇, 陈俊廷. 不同温度下超高性能混凝土的弯拉性能. 硅酸盐学报, 2020 , 48 (11) : 1732 -1739 . DOI: 10.14062/j.issn.0454-5648.20200227
Zhi FANG, Shaokun LIU, Zhengyu HUANG, Junting CHEN. Flexural Properties of Ultra-high Performance Concrete Under Different Temperatures[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (11) : 1732 -1739 . DOI: 10.14062/j.issn.0454-5648.20200227
  • 国家重点研发计划课题(2017YFC0703008)
  • 国家自然科学基金项目(51878262)
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doi: 10.14062/j.issn.0454-5648.20200227
  • 接收时间:2020-03-30
  • 首发时间:2026-10-29
  • 出版时间:2020-11-20
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  • 收稿日期:2020-03-30
  • 修回日期:2020-04-22
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国家重点研发计划课题(2017YFC0703008)
国家自然科学基金项目(51878262)
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    1.湖南大学土木工程学院,长沙 410082
    2.湖南大学风工程与桥梁工程湖南省重点实验室,长沙 410082
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2种不同金属材料的力学参数
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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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