| 摘要: |
| 为了研究骨料砂浆交界面损伤破坏过程的损伤特征进而分析其损伤机理，采用全数字化声发射采集系统监测了其整个劈裂损伤破坏过程.在对所伴生的声发射信号进行全面系统分析的基础上，从声发射累积特性、声发射单参数时程变化规律、声发射组合参数变化规律等方面对交界面损伤过程的典型声发射特性进行了研究，这对识别混凝土损伤演化规律和损伤的物理机理都具有重要参考价值. |
| 关键词: 混凝土 交界面 劈裂 声发射 损伤 |
| DOI：103969/j.issn1007 9629201402005 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51009058）；中国博士后科学基金面上资助项目（2011M501160）；中国水利水电科学研究院开放研究基金资助项目（IWHRKF201014） |
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| Experimental Study on Acoustic Emission Characteristics ofSplit Failure Processes for Aggregate Mortar Interface |
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WANG Yan1, ZHAO Haitao1, YAO Jinxin1, CHEN Yuzhi2
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1.College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;2.School of Architecture & Civil Engineering, Jinling Institute of Technology, Nanjing 211169, China
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| Abstract: |
| In order to observe the feature of split failure process of aggregate mortar interface with a view to analyze and understand its damage mechanism, the whole split damage processes of interface specimens for granite mortar were monitored by full digital acoustic emission(AE) acquisition system. On the basis of the statistics analysis of AE signals associated with interface damage processes comprehensively, typical AE characteristics were summed up from the aspects of accumulation characteristics of AE signals, time history scatter plots of single AE parameter; and distribution analysis of combined AE parameters. The research results may be recommended for further recognition of physical mechanism of concrete damage processes, and for a deeper understanding of aggregate mortar interfacial damage mechanism. |
| Key words: concrete interface split acoustic emission(AE) damage |
