...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Construction and Building Materials >Evaluation of concrete fracture procedure based on acoustic emission parameters
【24h】

Evaluation of concrete fracture procedure based on acoustic emission parameters

机译：基于声发射参数的混凝土断裂过程评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Acoustic emission (AE) acquiring technique was employed to explore the concrete fracture procedure in this study. Several parameters were evaluated through three-point bending beam tests using concrete fracture experiments. Acoustic emission instrument and strain gauges were used to monitor the initial and final fracture loads during crack propagation stage of specimens. In addition, the parameter values associated to crack propagations were obtained from the well-developed formula and test results. The typical trend curves and failure forms of each group of specimens were accompanied based on the crack-propagation theory. The designated concrete tests used in this study conducted a general process of crack fracture propagation. The experimental results indicated that AE detection system could well reflect the internal defects and cracks of the specimen. Additionally, the results illustrated that AE technology could reflect the initial fracture moment and final structure failure at a relatively low loading rate, and consequently could acquire the initial and failure fracture loadings. Based on this limited study, it can be found that, in most cases, concrete AE parameter characteristic could reflect the concrete crack propagation and its complete structure failure during the loading procedure. Additionally, it was found that the test results from AE method were similar to those from strain gauge method.
机译：在这项研究中，采用声发射（AE）获取技术来探索混凝土的破裂过程。通过使用混凝土断裂实验的三点弯曲梁测试评估了几个参数。使用声发射仪器和应变仪监测样品裂纹扩展阶段的初始和最终断裂载荷。另外，与裂纹扩展相关的参数值是从完善的公式和测试结果中获得的。基于裂纹扩展理论，给出了每组试样的典型趋势曲线和破坏形式。本研究中使用的指定混凝土测试进行了裂纹扩展的一般过程。实验结果表明，声发射检测系统可以很好地反映出试样的内部缺陷和裂纹。此外，结果表明，AE技术可以在相对较低的加载速率下反映初始断裂力矩和最终结构破坏，因此可以获得初始和破坏断裂载荷。基于这项有限的研究，可以发现，在大多数情况下，混凝土AE参数特征可以反映混凝土在加载过程中裂纹的扩展及其完整的结构破坏。另外，发现AE方法的测试结果与应变仪方法的测试结果相似。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号