RAPID/Collaborative Research: Subsurface Characterization of Liquefaction Case Histories from the 2023 Kahramanmaras Earthquake Sequence

快速/协作研究：2023 年卡赫拉曼马拉斯地震序列液化案例历史的地下特征

• 批准号: 2338026
• 负责人: Patrick Bassal
• 金额: $ 1.4万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2338026&HistoricalAwards=false
• 关键词: RAPID; Collaborative; Research; Subsurface; Characterization

This Grants for Rapid Response Research (RAPID) award will provide well-documented case histories on building and ground performance during earthquakes. The US has not experienced a large, widely-damaging earthquake for nearly 30 years. However, advancements can be made by understanding earthquake damage in countries with similar seismic risks and infrastructure, such as Turkey. The 2023 Kahramanmaras, Turkey earthquake sequence provides a unique opportunity to evaluate the effects of earthquake shaking on diverse infrastructure in varied geologic environments subjected to a wide range of shaking intensities. The post-earthquake observations enable the study of the effects of near-fault ground motions, liquefaction-induced infrastructure damage, and the cyclic behavior of silt and clay soils. Characterization of the ground at key sites allows to develop insights that are directly applicable to US cities such as San Francisco, Seattle, and Memphis. The work will proceed collaboratively with Turkish researchers to learn as much as possible from these earthquakes. The goal of the project is to benefit society through increased resiliency, sustainability, and affordability of civil infrastructure considering seismic impacts. The award will help train the next generation of US earthquake engineering leaders by supporting the interaction of a senior researcher with three early-career researchers from four institutions across the US, as well as the mentorship of a graduate student. This project focuses on obtaining subsurface data at key sites, which is essential to developing well-documented case histories of building and ground performance during earthquakes. The subsurface information will be collected primarily through seismic piezocone penetration tests to characterize the ground conditions, including shear wave velocity, and to detect critical soil layers. Additionally, exploratory soil borings will be performed to obtain samples for soil index testing. The subsurface data collected in this project will provide critical information to significantly expand the number of comprehensive case histories of liquefaction-infrastructure interactions, focusing on (1) infrastructure affected by ground shaking and ground failure in the near-fault region, (2) liquefaction-induced building damage, and (3) liquefaction of silts and clays. These three topics represent areas of earthquake engineering with knowledge gaps due to a dearth of case histories. Additionally, the subsurface data will provide insights regarding climate change and earthquake multi-hazards by contributing to evaluations of the frequent coastal flooding of Iskenderun, presumably due to liquefaction-induced ground movements.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项授予快速响应研究（Rapid）奖的赠款将提供有关地震期间建筑和地面绩效的案例案例历史。美国在将近30年的时间里没有经历过大型，受到严重破坏的地震。但是，可以通过了解具有类似地震风险和基础设施（例如土耳其）的国家的地震损害来取得进步。土耳其地震序列的2023年卡哈拉曼马群岛序列提供了一个独特的机会，可以评估地震摇动对各种地质环境中各种基础设施的影响，并受到广泛的摇动强度。地球后观察结果可以研究近磨损地面运动，液化诱导的基础设施损害以及淤泥和粘土土壤的环状行为的影响。在关键地点的地面表征可以开发直接适用于旧金山，西雅图和孟菲斯等美国城市的见解。这项工作将与土耳其研究人员合作，以尽可能多地从这些地震中学习。该项目的目的是通过考虑地震影响的弹性，可持续性和民事基础设施的负担能力来使社会受益。该奖项将通过支持一名高级研究人员与来自美国四个机构的三名早期研究人员的互动以及研究生的指导，来帮助培训美国下一代地震工程领导者。该项目着重于在关键站点获得地下数据，这对于在地震期间开发有据可查的建筑物和地面性能的病史至关重要。地下信息将主要通过地震压电渗透测试来收集，以表征地面条件，包括剪切波速度，并检测关键的土壤层。此外，将进行探索性土壤钻孔以获取用于土壤指数测试的样品。该项目中收集的地下数据将提供关键信息，以显着扩大液化基础结构相互作用的全面案例历史的数量，重点是（1）受地面摇动和近场区域的地面故障影响的基础设施，（2）液化诱导的建筑物损坏，以及（3）SIL和CLAYS和CLAYS的液体。这三个主题代表了地震工程的领域，由于案例历史的缺乏，具有知识差距。此外，地下数据将通过评估伊斯肯德伦的频繁沿海洪水的评估，从而提供有关气候变化和地震多危险的见解，这可能是由于液化引起的地面运动，这奖反映了NSF的法定任务，并通过评估了基金会的范围和广泛的影响，并被认为是值得评估的，并具有值得的支持。