EAGER: Use of Advanced Imaging to Discover Deformation, Temperature and Moisture Behavior of Fire Exposed RC Walls

EAGER：使用先进成像发现暴露在火中的 RC 墙的变形、温度和湿度行为

• 批准号: 1049577
• 负责人: Michael McGinnis
• 金额: $ 2.5万
• 依托单位: University of Texas at Tyler
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1049577&HistoricalAwards=false
• 关键词: EAGER; Use; Advanced; Imaging; Discover

The goal of the research is to investigate the application of new imaging technologies to capture the complete response of reinforced concrete walls exposed to fire. Several reinforced concrete walls are planned to be tested at the University of Notre Dame under a National Science Foundation sponsored project. These walls will be instrumented with traditional strain gages and temperature sensors. This project augments the existing measurements by using advanced photographic methods to provide more complete description of the surface movements and temperatures, and using nuclear magnetic resonance imaging to measure moisture distributions through the thickness of the walls. The comparison of the measurements made by traditional sensors and the proposed new technology will validate this new experimental data collecting approach for future applications. The images generated by the new approach will also be used to develop better visualization of the test specimen response and aid in correlating the temperatures, moisture movement, strains, cracking, and concrete spalling with structural failure. Simultaneous measurements of the deformations, temperatures and humidity with the proposed technology will provide a complete description of the response, leading to better modeling methods, improved performance prediction approaches, and enhanced design procedures for reinforced concrete walls exposed to fires. The project, when successfully completed, is expected to provide a more versatile approach to make accurate and comprehensive response measurements in structural testing. The new approach is also expected to avoid the use of the traditional lead wired sensors used in structural testing that are sometimes difficult to manage. The project will provide a more convenient method to collect much needed data to develop better methods for fire resistant design of structures. With this new research and testing capability, the project will enhance the research infrastructure at the University of Texas at Tyler, a primarily undergraduate institution, to provide advanced knowledge and training to undergraduate and graduate students.

该研究的目的是研究新成像技术的应用，以捕获暴露于火的钢筋混凝土壁的完全响应。 计划在国家科学基金会赞助的项目下，在巴黎大学的圣母院测试几个钢筋混凝土墙。 这些墙壁将用传统的应变仪和温度传感器进行仪器。 该项目通过使用先进的照相方法来增强现有的测量结果，以提供对表面运动和温度的更完整描述，并使用核磁共振成像通过墙壁的厚度来测量水分分布。 传统传感器和拟议的新技术进行的测量值的比较将验证这种新的实验数据收集方法，以实现未来的应用。新方法产生的图像也将用于更好地可视化测试标本响应，并有助于将温度，水分运动，压力，破裂和混凝土剥落与结构性衰竭相关联。与拟议技术的变形，温度和湿度的同时测量将提供对响应的完整描述，从而导致更好的建模方法，改进的性能预测方法以及增强的设计程序，以增强暴露于火灾的钢筋混凝土壁。 该项目成功完成后，预计将提供一种更通用的方法，以在结构测试中进行准确，全面的响应测量。 还希望这种新方法避免使用有时难以管理的结构测试中使用的传统铅有线传感器。 该项目将提供一种更方便的方法来收集急需的数据，以开发更好的结构耐火方法的方法。 借助这项新的研究和测试能力，该项目将增强主要是本科机构泰勒分校的研究基础设施，以向本科生和研究生提供高级知识和培训。