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

本研究的目的是研究新的成像技术的应用，以捕捉暴露于火灾的钢筋混凝土墙的完整响应。 根据美国国家科学基金会赞助的一个项目，计划在圣母大学对几堵钢筋混凝土墙进行测试。 这些墙壁将装有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增强现有的测量，以提供对表面运动和温度的更完整的描述，并使用核磁共振成像来测量壁厚上的水分分布。 传统传感器和所提出的新技术的测量结果的比较将验证这种新的实验数据收集方法，为未来的应用。新方法生成的图像也将用于开发更好的可视化测试样本响应，并有助于将温度，水分运动，应变，开裂和混凝土剥落与结构失效相关联。同时测量的变形，温度和湿度与所提出的技术将提供一个完整的描述的响应，导致更好的建模方法，改进的性能预测方法，并加强设计程序暴露于火灾的钢筋混凝土墙。 该项目成功完成后，预计将提供一种更通用的方法，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传统的导线传感器，这些传感器用于结构测试，有时难以管理。 该项目将提供一个更方便的方法来收集急需的数据，以开发更好的方法，结构的抗火设计。 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，这是一所主要的本科院校，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.