李冬生

364

  • 教授     博士生导师   硕士生导师
  • 主要任职:建设工程学院副院长
  • 其他任职:土木水利国家教学示范中心主任、辽宁省土木基础设施安全监测与控制重点实验室主任
  • 性别:男
  • 毕业院校:哈尔滨工业大学
  • 学位:博士
  • 所在单位:建设工程学院
  • 学科:结构工程. 桥梁与隧道工程
  • 办公地点:土木工程学院综合3号楼305研究室
  • 联系方式:lidongsheng@dlut.edu.cn
  • 电子邮箱:lidongsheng@dlut.edu.cn

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自愈合混凝土损伤演化声发射监测及其评价技术

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发表时间:2022-10-06

发表刊物:大连理工大学学报

所属单位:建设工程学部

卷号:52

期号:5

页面范围:701-706

ISSN号:1000-8608

摘要:The concrete ultimate load capacity is improved through
   self-repairing.Because there is a dearth of studies regarding damage
   evolution of self-repairing concrete,acoustic emission(AE) technology is
   presented to monitor its evolution process.The full-process damage of
   self-repairing concrete is monitored under three-point bending beam
   testing using AE technique.It is found that the initiation,propagation
   and evolution of self-repairing concrete cracks can be described using
   AE hits.Firstly,the corresponding relationship between the AE hits and
   load is testified by comparing with their embraceable curve.Secondly,the
   repairing effect of self-repairing concrete is judged using Kaiser
   effect and Felicity ratio.Finally,the different damage types of AE
   waveforms of self-repairing concrete are extracted and analyzed using
   wavelet singularity theory.The damage causes are analyzed according to
   the waveform frequency distribution.The testing results show the AE
   technique can provide a new testing method for self-repairing concrete
   damage judgment.

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