NEESR-SG: Evaluation of Ground Rupture Effects on Critical Lifelines

这项研究解决了影响所有地下生命线的一个根本问题，即地面大差异变形对埋地管道和管道性能的影响。这项研究将通过最先进的建模和量化地震引起的地面运动对生命线的影响来产生开创性的结果。它还将改进受山体滑坡、采矿、地下流体开采和地下建设影响的生命线的设计和施工。研究成果至少包括：1)永久地面变形下生命线性能的系统评估，2)关键生命线的适用性和最终极限状态的量化，3)设计指南，4)实验数据库，用于基准未来的数值模型和指导土壤-结构相互作用的数值模拟的演变，以及5)对先进材料以及传感器和机器人在地下管道中的部署进行验证和指导。这项研究将通过使用康奈尔生命线系统大位移土-结构相互作用设施和Rensselaer 150g吨土工离心机结合先进的计算模拟进行物理建模。这项为期4年的计划是按照矩阵管理方法组织的，在该方法中，通过大规模实验、离心机测试和数值模拟，系统地研究和检验了生命线对一套全面的地面破裂模式的响应。技术优势：康奈尔大学和伦斯勒大学的研究团队在地下生命线的设计、选址和施工以及管道/导管的实验室和现场测试方面拥有丰富的经验。他们广泛合作，在生命线、岩土工程和结构工程方面的贡献在国内和国际上享有盛誉。此外，他们将遵循一项细致而系统的研究计划，并对其进行彻底的整合和管理。他们将使用专门为这类调查建造的世界级NEES设施。通过拟议项目进行的研究投资将被用于改善水、电力、天然气和液体燃料、电信、交通和废水输送生命线的实践，这些生命线代表了数十万公里的美国设施，这些设施对提供社区资源和服务至关重要。更广泛的影响：拟议的项目解决了关键基础设施的安全和可靠性问题，同时还与纽约州伊萨卡的科学中心共同创建了一个创新的外联计划。该项目团队将开发一个300英尺长的地震工程博物馆展览，并将解释NEES现场的工程师如何使用联网的实验设备研究地震效应。一种可以由互联网上的任何人控制的交互式振动台将允许博物馆参观者、学校班级和家庭用户参与地震工程实验，估计在四年内接触到60万人。该项目将模拟其他NEES站点如何与美国各地的400个科学中心建立联系。该项目涉及与业界的大量合作，包括ADS，Inc.、康宁公司、埃克森美孚、洛杉矶水电部门、Phillips DrisCopipe，Inc.、东京天然气公司和ULC Robotics，Inc.。因此，研究结果将以行业为指导，以最大限度地在实践中产生影响，对美国劳动力进行继续教育，并在基础设施项目中在全国范围内传播。该项目将得到康奈尔大学在支持女性和少数族裔本科生暑期研究体验方面的帮助，并将受益于一个科学中心项目，该项目将支持来自服务不足社区的青少年博物馆导游。将通过NSF REU计划寻求更多的本科生支持，研究生将得到支持，研究成果将被整合到由PIs及其在康奈尔、伦斯勒和其他机构的同事教授的课程中。

The research addresses a fundamental problem affecting all underground lifelines, namely the effects of large differential ground deformation on buried pipeline and conduit performance. The research will produce a seminal outcome through state-of-the-art modeling and quantification of earthquake-induced ground movement effects on lifelines. It also will improve the design and construction of lifelines affected by landslides, mining, extraction of subsurface fluids, and underground construction. The research deliverables include, as a minimum: 1) systematic assessment of lifeline performance under permanent ground deformation, 2) quantification of serviceability and ultimate limit states for critical lifelines, 3) design guidelines, 4) experimental databases for benchmarking future numerical models and guiding the evolution of numerical simulations for soil-structure interaction, and 5) validation and guidance for advanced materials as well as sensor and robotics deployment in underground conduits. The research will be performed through physical modeling using the Cornell Large Displacement Soil-Structure Interaction Facility for Lifeline Systems and the Rensselaer 150 g-ton Geotechnical Centrifuge in combination with advanced computational simulation. The 4-year program is organized according to a matrix management approach in which lifeline response to a comprehensive suite of ground rupture patterns is systematically investigated and checked through large-scale experiments, centrifuge tests, and numerical simulation. Technical Merits: The research team at Cornell and Rensselaer has extensive experience in the design, siting, and construction of underground lifelines, as well as laboratory and field testing of pipelines/conduits. They have worked extensively together and have earned a strong national and international reputation for their contributions to lifeline, geotechnical, and structural engineering. Moreover, they will follow a meticulous and systematic plan for the research that is thoroughly integrated and managed. They will use world-class NEES facilities that were constructed specifically for this type of investigation. Research investments through the proposed project will be leveraged into improved practices for water, electric power, gas and liquid fuel, telecommunication, transportation, and wastewater conveyance lifelines representing hundreds of thousands of km of US facilities critical for the delivery of community resources and services. Broader Impacts: The proposed project addresses safety and reliability of critical infrastructure while also creating an innovative outreach program with the Sciencenter of Ithaca, NY. The project team will develop a 300-SF museum exhibition on earthquake engineering and will explain how engineers at NEES sites study earthquake effects using networked experimental facilities. An interactive shake table that can be controlled by anyone on the Internet will allow museum visitors, school classes, and home users to participate in earthquake engineering experiments, reaching an estimated 600,000 individuals over four years. The project will model a process for how other NEES sites can link with 400 science centers throughout the U.S. The project involves substantial collaboration with industry, including ADS, Inc., Corning, Inc., Exxon Mobil, Los Angeles Department of Water and Power, Phillips Driscopipe, Inc., Tokyo Gas Co., Ltd., and ULC Robotics, Inc. Hence, the research results will be guided by industry for maximum impact in practice, continuing education of the U.S. work force, and nationwide dissemination in infrastructure projects. The project will receive assistance from Cornell in supporting women and minority summer research experiences for undergraduates, and will benefit from a Sciencenter program that will support teenage museum guides from underserved communities. Additional undergraduate support will be sought through the NSF REU program, graduate students will be supported, and research results will be integrated into courses taught by the PIs and their colleagues at Cornell, Rensselaer, and other institutions.