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

这项研究的目的是研究新的成像技术的应用，以捕捉暴露在火灾中的钢筋混凝土墙的完整反应。美国国家科学基金会（National Science Foundation）资助的一个项目计划在圣母大学（University of Notre Dame）对几面钢筋混凝土墙进行测试。这些墙壁将配备传统的应变计和温度传感器。该项目通过使用先进的摄影方法来提供更完整的表面运动和温度描述，并使用核磁共振成像来测量壁厚中的水分分布，从而增强了现有的测量。将传统传感器的测量结果与提出的新技术进行比较，将验证这种新的实验数据收集方法在未来的应用。新方法生成的图像也将用于更好地可视化试件响应，并有助于将温度、水分运动、应变、开裂和混凝土剥落与结构破坏相关联。同时测量变形、温度和湿度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，并增强暴露在火灾中的钢筋混凝土墙的设计程序。该项目成功完成后，预计将提供一种更通用的方法，以便在结构测试中进行准确和全面的响应测量。新方法还有望避免使用结构测试中使用的传统引线传感器，这些传感器有时难以管理。该项目将提供一种更方便的方法来收集急需的数据，以制定更好的结构防火设计方法。有了这种新的研究和测试能力，该项目将加强德克萨斯大学泰勒分校的研究基础设施，为本科生和研究生提供先进的知识和培训。

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.