• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>NDT & E international >Using ground penetrating radar and time-frequency analysis to characterize construction materials
【24h】

Using ground penetrating radar and time-frequency analysis to characterize construction materials

机译：使用探地雷达和时频分析来表征建筑材料

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

For decades, applications of nondestructive evaluation-civil engineering (NDE-CE) focus on object identifications (such as steel bars, tendon ducts and backwall reflections) in infrastructures. Because of the advantage of efficient visualization of internal structure, utilization of these methods can probably be extended to material characterization (MC) of aging and adversely exposed infrastructures. However, two factors yield a big gap between NDE and MC. First, for the ease of visualization, the primary focus of NDE-signal processing is object identification, which usually alters the originality of the signal. Second, there is lack of relationship and inverse models bridging the NDE-derived and conventional material properties compared to other disciplines of science, such as geophysics. These disadvantages make laboratory and field-scale NDE-MC still a far-reaching holy grail and is possibly the greatest hurdle to be regularly adopted in CE structures. This paper attempts to address this gap from object identification to MC using ground penetrating radar (GPR) as one of the most frequently used NDE-CE methods, and signal processing with joint time-frequency domain (JTFA) analysis. Three examples of material property characterization regarding the individual effects of steel bar corrosion in concrete, hydration and moisture content distribution of construction materials are given.
机译：数十年来，非破坏性评估土木工程（NDE-CE）的应用一直专注于基础架构中的对象识别（例如钢筋，腱导管和后壁反射）。由于内部结构的有效可视化的优势，这些方法的使用可能会扩展到老化和不良暴露的基础结构的材料表征（MC）。但是，有两个因素导致NDE和MC之间存在很大差距。首先，为便于可视化，NDE信号处理的主要重点是对象识别，这通常会改变信号的原始性。其次，与地球物理等其他科学学科相比，缺乏将NDE派生的材料特性与常规材料特性联系起来的关系和逆模型。这些缺点使实验室和现场规模的NDE-MC仍然是一个深远的圣杯，并且可能是CE结构中经常采用的最大障碍。本文试图通过使用探地雷达（GPR）作为最常使用的NDE-CE方法以及联合时频域（JTFA）分析的信号处理来解决从目标识别到MC的这一差距。给出了三个有关混凝土中钢筋腐蚀，水合和建筑材料水分分布的个体影响的材料特性表征的例子。

著录项

  • 来源
    《NDT & E international》 |2011年第1期|p.111-120|共10页
  • 作者

    W.L.Lai; T. Kind; H. Wiggenhauser;

  • 作者单位

    BAM, Federal Institute for Materials Research and Testing, Division VIII.2, Unter den Eichen 87, 12205 Berlin, Germany;

    BAM, Federal Institute for Materials Research and Testing, Division VIII.2, Unter den Eichen 87, 12205 Berlin, Germany;

    BAM, Federal Institute for Materials Research and Testing, Division VIII.2, Unter den Eichen 87, 12205 Berlin, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ground penetrating radar; time-frequency analysis; construction materials; short time fourier transform;

    机译：探地雷达时频分析;建筑材料;短时傅立叶变换;

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