RAPID: Geotechnical Engineering and Geo-Sciences Response to the 6 February 2023 Turkiye Earthquake Sequence

RAPID：岩土工程和地球科学对 2023 年 2 月 6 日土耳其地震序列的响应

• 批准号: 2331127
• 负责人: Jonathan Stewart
• 金额: $ 8.82万
• 依托单位: University of California-Los Angeles
• 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: 2023-06-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2331127&HistoricalAwards=false
• 关键词: RAPID; Geotechnical; Engineering; Geo; Sciences

The 6 February 2023 Türkiye Earthquake Sequence involved large-magnitude, strike-slip earthquakes along plate boundary faults. Similar strike-slip plate boundary faults exist in many other areas globally, including California. While the presence of the faults is known, much remains unknown about the effects of earthquakes on those faults, both in terms of the associated seismic hazards (levels of ground motion) and the impacts on people and infrastructure. As such, it is essential that the earthquake engineering and seismology communities learn from this devastating and seminal event. That learning began with a coordinated, multi-nation and multi-institution reconnaissance program jointly organized between the US and Turkey (Cetin et al. 2023, GEER Association Report 082). This Grant for Rapid Reponse Research (RAPID) project builds upon the reconnaissance work to investigate sites that are of special interest, developing the available data to the point that it can be used to advance seismological and engineering modeling, and thereby influence seismic risk reduction. This RAPID award supports researchers conducting targeted investigations at specific locations in the regions affected by two large earthquakes on 6 February 2023. The investigations include: (1) Documenting surface fault rupture by developing Structure from Motion (SfM) models of the full length of the rupture to supplement in-field evaluations at specific locations. (2) Fault trenching/dating near the southern end of the East Anatolian Fault (ruptured in 2023 event) as it transitions to the Dead Sea Fault (did not rupture) to understand how offsets between fault segments can arrest rupture and the “loading” of non-ruptured faults. (3) Characterizing ground motion station sites close to the ruptured fault using surface wave and seismic cone penetration testing, where such data is currently lacking. (4) Performing limited additional reconnaissance at targeted sites such as port facilities. The broader impact of this work is to inform recovery, inform our understanding of multi-fault rupture sequences with application in parts of the US, and populate databases used to build predictive models for surface fault rupture, ground motions, seismic dam performance, seismic lifelines performance, liquefaction triggering and deformations, and seismic foundation performance among others.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.

2023年2月6日，Türkiye地震序列涉及沿板边界断层的大型降压，滑移地震。在包括加利福尼亚在内的全球许多其他领域，也存在类似的滑移板边界断层。尽管已知断层的存在，但在相关的地震危害（地面运动水平）以及对人和基础设施的影响方面，地震对这些断层的影响尚不清楚。因此，地震工程和地震学社区必须从这一破坏和第二个事件中学习。该学习始于美国和土耳其之间共同组织的协调，多国和多机构侦察计划（Cetin等，2023年，Geer Association报告082）。这项用于快速响应研究（Rapid）项目的赠款基于侦察工作，以调查具有特殊关注的地点，开发可用数据，以便可以用于推进地震学和工程建模，从而影响地震风险的降低。这项快速奖项支持研究人员在2023年2月6日在受两次大地震影响的地区进行针对性调查的研究人员。投资包括：（1）通过发展结构（SFM）模型来记录表面故障破裂（SFM）的全长模型，以补充特定位置的现场评估。 （2）由于它过渡到死海断层（没有破裂），以了解断层段之间的偏移如何阻止破裂和非破裂断层的“加载”，因此它在东安那托利亚断层的南端附近的断层沟槽/约会时（在2023年发生的事件发生破裂）。 （3）使用地面波和地震锥穿透测试来表征接近破裂断层的地面运动站点，目前缺乏此类数据。 （4）在港口设施等目标地点进行有限的额外侦察。这项工作的更广泛的影响是为恢复提供信息，告知我们对美国部分地区应用多型破裂序列的理解，并填充用于建立表面断裂，地面运动，地面运动，地震性能绩效的预测模型的数据库基金会的智力优点和更广泛的影响审查标准。