CAREER: Rapid non-destructive assessment of concrete structures using elastic waves

职业：使用弹性波对混凝土结构进行快速无损评估

• 批准号: 9984632
• 负责人: John Popovics
• 金额: $ 20万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2002-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9984632&HistoricalAwards=false
• 关键词: CAREER; Rapid; non; destructive; assessment

This proposal offers an approach for rapid and accurate non-destructive evaluation (NDE) to assess the in-place condition of concrete structures. Sensitive and practical NDE techniques are of great value to agencies that govern the infrastructure. However, the time and effort required to perform current NDE tests and to analyze the results limit widespread application. This proposal aims to develop a rapid and robust method to collect elastic wave data from a concrete structure and an approach for imaging structures that characterizes the location, type and magnitude of damaged areas. The proposed approach makes use of several innovations including (a) use of surface-guided waves, (b) sensitive, non-contact wave reception techniques such as air-coupled transducers and laser interferometry, (c) one-sided, point source, point receiver NDE measurements such as surface wave transmission and velocity scans, and (d) an imaging approach that makes use of the developed measurement data. An educational plan is closely integrated with the proposed research. The intent of the educational plan is to design an undergraduate and graduate engineering curriculum at Drexel University that responds to current needs of the infrastructure industry. The plan also includes additional educational outreach to encourage inner-city students to pursue a career in engineering.

该建议提供了一种快速准确的无损评价（NDE），以评估混凝土结构的原位状态的方法。敏感和实用的无损检测技术对管理基础设施的机构具有重要价值。然而，执行当前NDE测试和分析结果所需的时间和精力限制了广泛的应用。该提案旨在开发一种快速可靠的方法，从混凝土结构中收集弹性波数据，并开发一种用于成像结构的方法，以表征受损区域的位置，类型和大小。所提出的方法利用了几项创新，包括（a）使用表面导波，（B）灵敏的非接触波接收技术，例如空气耦合传感器和激光干涉测量，（c）单侧、点源、点接收器NDE测量，例如表面波传输和速度扫描，以及（d）利用开发的测量数据的成像方法。教育计划与拟议的研究紧密结合。 教育计划的目的是设计一个本科生和研究生工程课程在德雷克塞尔大学，响应基础设施行业的当前需求。该计划还包括额外的教育推广，以鼓励市中心的学生追求工程事业。