NEESR-SG: Damage Detection and Health Monitoring of Buried Pipelines after Earthquake-Induced Ground Movement

这项拟议的研究是国家科学基金会07-506项目征集“小乔治·E·布朗地震工程模拟网络(NEES)研究”竞赛的成果。该项目由密歇根大学领导，包括对梅里马克学院和普渡大学的子奖。该项目将利用康奈尔大学的NEES生命线实验设施。地震等自然灾害后生命线受损情况的评估是应急和救援工作的重要组成部分。尤其重要的是供水系统，因为水是重要的生存资源。即使对供水管道的轻微损坏也可能导致污染和疫情暴发。水在混凝土和金属管道中传输，很容易受到地面运动的破坏，因此建议对这两种管道设计损伤检测方法。快速评估这些管道的完整性对于首先规划恢复特派团和随后的基础设施重建是必要的。对管道结构健康状况的长期监测也是基础设施维护的重要组成部分。生命线损害评估的一个挑战是，大多数管道埋在土壤中。这项提议将制定检测永久地面位移对混凝土和金属管道造成损害的方法。据设想，未来的生命线将是由具有自我感知能力的材料建造的智能结构，并将使用无线技术将携带信息的信号传输到地面。提出的研究包括三个部分：地面移动作用下管道的土-结构相互作用、材料研究与设计(特别是自感知混凝土)和专注于数据采集、处理和传输的信息技术。这项研究对社会的广泛影响将通过提高自然灾害后生命线损害评估的能力以及通过更好的长期健康监测方法来实现。该项目的一个独特之处是项目团队通过密歇根州安娜堡的实践博物馆和纽约伊萨卡的科学中心参与了一项外展计划，在那里可以直接接触到年轻观众，并就工程和国家基础设施问题对他们进行教育。该项目的数据将通过NEES数据库(http://www.nees.org).)提供

This proposed research is an outcome of the National Science Foundation 07-506 program solicitation "George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Research" competition. This project is led by the University of Michigan and includes subawards to Merrimack College and Purdue University. This project will utilize the NEES lifeline experimental facilities at Cornell University. The assessment of damage to lifelines after natural disasters, such as earthquakes, is a crucial component of emergency response and rescue efforts. Of particular importance is the water supply system, as water is an important survival resource. Even minor damage to water pipelines can result in contamination and epidemic outbreaks. Water is transmitted in concrete and metal pipes, which are vulnerable to damage caused by ground motions; it is proposed that damage detection methods be devised for both kinds of pipes. Quick assessment of the integrity of these pipelines is necessary for first planning the recovery mission and subsequent infrastructure reconstruction. The long-term monitoring of the structural health of pipelines is also an important component of infrastructure maintenance. A challenge in damage assessment to lifelines is in the fact that most pipelines are buried in soil. This proposal will develop methods for the detection of damage to concrete and metal pipelines caused by permanent ground displacement. It is envisioned that future lifelines will be smart structures built of materials with self-sensing capabilities, and wireless techniques will be used to transmit the information-carrying signal to the ground surface. The research proposed has three components: soil-structure interaction of pipelines subjected to ground movement, material research and design (particularly self-sensing concrete), and information technology focused on data gathering, processing and transfer. The broad impacts of this research on society will come through increased capabilities of damage assessment to lifelines after natural disasters, and through better long-term health monitoring methods. A unique aspect of this project is the involvement of the project team in an outreach program through the Hands-On Museum in Ann Arbor, Michigan and the Sciencenter in Ithaca, New York, where a young audience can be directly reached and educated on the issues of engineering and the nation's infrastructure. Data from this project will be made available through the NEES data repository (http://www.nees.org).