• 综合
  • 标题
  • 关键词
  • 摘要
  • 学者
  • 期刊-刊名
  • 期刊-ISSN
  • 会议名称
搜索

作者:

Jiao, Yubo (Jiao, Yubo.) | Xu, Lijun (Xu, Lijun.) | Han, Xiao (Han, Xiao.) | Yang, Hua (Yang, Hua.) | Fang, Menghan (Fang, Menghan.) | Cao, Jun (Cao, Jun.)

收录:

EI Scopus SCIE

摘要:

Ultra-high performance glass sand concrete (UHPGC) is a new composite material with superior mechanical properties and durability made by replacing quartz sand in traditional ultra-high performance concrete (UHPC) with environmentally friendly and economical glass sand recycled from waste glass. This study investigated the flexural and fracture characteristics of UHPGC notched beams with prefabricated notches at three different locations (mid-span, 100 mm off mid-span and 145 mm off mid-span) using four-point bending tests. Meanwhile, the damage evolution processes of notched beams under flex-ural load were monitored in real time and characterized by acoustic emission (AE) tech-nology. Fracture modes were automatically classified based on Gaussian mixture model (GMM) and support vector machine (SVM) of rise angle (RA) and average frequency (AF). Outlier analysis of b-value were applied to provide a warning prior to complete failure of UHPGC notched specimen. The results revealed that notched position presents significant effects on flexural strength, flexural toughness and fracture energy, and exhibit consid-erable influence on AE parameters and cracking patterns. The farther the notch is away from the mid-span, the greater the flexural strength, flexural toughness and fracture en-ergy exhibit due to the weakened stress concentration. As it takes longer to gather enough strain energy at the tip of the notch to crack, AE monitoring shows that higher amplitude and hysteretic nature of AE parameters such as accumulated energy and information entropy, etc., can be recorded as notch position away from the mid-span. The farther the notch is away from mid-span, the more shear cracks predominate at the later stages of damage. Cumulative AE energy and fracture energy throughout the damage process are found to exhibit a favorable exponential relationship. In addition, the b-value outlier analysis can provide failure warning for UHPGC notched beams. This study is of great significance in exploring the fracture behavior of UHPGC and providing reference for en-gineering applications related to UHPGC failure.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

关键词:

Notch location UHPGC Fracture behavior Acoustic emission Flexural behavior

作者机构:

  • [ 1 ] [Jiao, Yubo]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, State Key Lab Bridge Engn Safety & Resilience, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Xu, Lijun]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, State Key Lab Bridge Engn Safety & Resilience, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Yang, Hua]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, State Key Lab Bridge Engn Safety & Resilience, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Fang, Menghan]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, State Key Lab Bridge Engn Safety & Resilience, Minist Educ, Beijing, Peoples R China
  • [ 5 ] [Han, Xiao]CCCC Highway Bridges Natl Engn Res Ctr CO Ltd, Beijing, Peoples R China
  • [ 6 ] [Cao, Jun]Gansu Prov Highway Aviat Tourism Investment Grp CO, Lanzhou, Peoples R China

通讯作者信息:

电子邮件地址:

查看成果更多字段

相关关键词:

来源 :

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

ISSN: 2238-7854

年份: 2023

卷: 26

页码: 8789-8805

6 . 4 0 0

JCR@2022

被引次数:

WoS核心集被引频次:

SCOPUS被引频次:

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

近30日浏览量: 0

归属院系:

在线人数/总访问数:276/4911169
地址:北京工业大学图书馆(北京市朝阳区平乐园100号 邮编:100124) 联系我们:010-67392185
版权所有:北京工业大学图书馆 站点建设与维护:北京爱琴海乐之技术有限公司