Natural Hazards Engineering Research Infrastructure: Experimental Facility with Large, Mobile Dynamic Shakers for Field Testing 2021-2025

自然灾害工程研究基础设施：配备大型移动动态振动台进行现场测试的实验设施 2021-2025

• 批准号: 2037900
• 负责人: Kenneth Stokoe
• 金额: $ 424.22万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Cooperative Agreement
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-01-01 至 2025-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2037900&HistoricalAwards=false
• 关键词: Natural; Hazards; Engineering; Research; Infrastructure

The Natural Hazards Engineering Research Infrastructure (NHERI) is supported by the National Science Foundation (NSF) as a distributed, multi-user national facility to provide the natural hazards engineering research community with access to research infrastructure that includes earthquake and wind engineering experimental facilities, cyberinfrastructure (CI), computational modeling and simulation tools, high performance computing resources, and research data, as well as education and community outreach activities. Originally funded under program solicitations NSF 14-605 and NSF 15-598, NHERI has operated since 2015 through separate, but coordinated, five-year research infrastructure awards for a Network Coordination Office, CI, Computational Modeling and Simulation Center, and Experimental Facilities, including a post-disaster, rapid response research facility. Information about NHERI resources are available at the NHERI web portal (https://www.DesignSafe-ci.org). Awards made for NHERI contribute to NSF's role in the National Earthquake Hazards Reduction Program (NEHRP) and the National Windstorm Impact Reduction Program (NWIRP). NHERI Experimental Facilities will provide access to their experimental resources, user services, and data management infrastructure for NSF-supported research and education awards. This award will renew support for the NHERI Experimental Facility located at the University of Texas at Austin from January 1, 2021, to September 30, 2025. Through this award, researchers will have access to large, mobile dynamic shakers and associated instrumentation for field experimental studies in natural hazards engineering. These large mobile shakers can be used to study and develop novel, in-situ testing methods for subsurface imaging and determining in-situ soil properties, evaluate the vulnerability of existing civil infrastructure to natural hazards, and optimize the design of future infrastructure. These advances will result in communities that are more resilient to earthquakes and other natural hazards. While small- to large-scale laboratory testing can provide valuable research data, there remains the need to field test a wide variety of infrastructure, as constructed, in its current state. The facility's equipment will support in-situ testing and allow for research tools to be developed in critical areas such as three-dimensional (3D) subsurface imaging (with applications such as rapid levee evaluation and void/cavity detection) and non-destructive testing (with applications such as advanced soil liquefaction evaluation and soil-foundation-structure interaction studies for buildings and bridges). Progress in these areas will lead the nation to the next frontier of resilient and sustainable infrastructure, which will benefit society and support continued economic, intellectual, and scientific growth. Experimental data generated from research conducted at this facility will be archived in the Data Depot on the NHERI web portal. The facility will conduct annual user workshops and will host Research Experiences for Undergraduate students. The facility will enable researchers to address three main challenges to making in-situ testing advancements that, if accomplished, could transform the ability to rehabilitate and build more resilient and sustainable communities. These three main challenges are: (1) significantly improving the accuracy and resolution of shallow-to-deep (greater than 1,000 meters) two-dimensional (2D) and 3D subsurface imaging; (2) characterizing the nonlinear dynamic response and liquefaction resistance of complex geomaterials in-situ; and (3) developing rapid, in-situ methods for non-destructive structural evaluations and for soil-foundation-structure interaction studies. While more heavily weighted toward addressing earthquake hazards, the ability to solve these challenges will also affect multi-hazard resiliency. For example, the challenge of performing rapid 2D and 3D subsurface imaging will apply directly to prioritizing rehabilitation of the nation's existing levee systems, many of which are currently not resilient to traditional flooding, hurricane storm surges, or earthquakes. The next frontier of natural hazards research requires that engineers develop practical solutions for complex problems, which will necessitate testing civil infrastructure systems over a wide range of actual field conditions. This in-situ testing can be accomplished using the mobile dynamic shakers and associated instrumentation of this facility. Additionally, to develop more resilient and sustainable communities, the facility will conduct outreach to engage and cultivate a diverse and talented group of future engineers who can address the challenges that face a rapidly growing population supported by aging infrastructure at risk to natural hazards.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.

自然灾害工程研究基础设施(NHERI)由国家科学基金会(NSF)支持，作为一个分布式、多用户的国家设施，向自然灾害工程研究社区提供访问研究基础设施的机会，这些基础设施包括地震和风力工程实验设施、网络基础设施(CI)、计算建模和模拟工具、高性能计算资源和研究数据，以及教育和社区推广活动。NHERI最初由计划征集NSF 14-605和NSF 15-598提供资金，自2015年以来一直通过网络协调办公室、CI、计算建模和仿真中心以及实验设施(包括灾后快速反应研究设施)获得单独但协调的五年研究基础设施奖。有关NHERI资源的信息可在NHERI Web门户网站(https://www.DesignSafe-ci.org).)上找到授予NHERI的奖项有助于NSF在国家减少地震灾害计划(NEHRP)和国家减少风暴影响计划(NWIRP)中发挥的作用。NHERI实验设施将为NSF支持的研究和教育奖项提供对其实验资源、用户服务和数据管理基础设施的访问。该奖项将继续支持位于得克萨斯大学奥斯汀分校的NHERI实验设施，时间为2021年1月1日至2025年9月30日。通过这一奖项，研究人员将有机会获得大型移动动态振动器和相关仪器，用于自然灾害工程的现场实验研究。这些大型移动振动器可用于研究和开发新的现场测试方法，用于地下成像和确定现场土壤特性，评估现有民用基础设施对自然灾害的脆弱性，并优化未来基础设施的设计。这些进展将使社区对地震和其他自然灾害具有更强的适应能力。虽然从小规模到大规模的实验室测试可以提供有价值的研究数据，但仍有必要实地测试各种已建成的基础设施，使其处于目前的状态。该设施的设备将支持现场测试，并允许在关键领域开发研究工具，例如三维(3D)地下成像(具有快速堤坝评估和空洞/空洞检测等应用)和无损检测(具有高级土壤液化评估和建筑物和桥梁的土壤-基础-结构相互作用研究等应用)。这些领域的进步将把国家带入弹性和可持续基础设施的下一个前沿，这将造福社会，并支持经济、智力和科学的持续增长。在该设施进行的研究产生的实验数据将在NHERI门户网站上的数据仓库中存档。该设施将每年举办用户研讨会，并将为本科生提供研究体验。该设施将使研究人员能够解决在现场测试方面取得进展的三个主要挑战，如果取得进展，可能会改变恢复和建立更具弹性和可持续社区的能力。这三个主要挑战是：(1)显著提高从浅到深(大于1,000米)二维(2D)和三维地下成像的精度和分辨率；(2)现场表征复杂岩土材料的非线性动力响应和抗液化能力；(3)开发快速、原位的非破坏性结构评估方法和土-基础-结构相互作用研究方法。虽然更倾向于应对地震灾害，但解决这些挑战的能力也将影响多种灾害的复原力。例如，执行快速2D和3D地下成像的挑战将直接适用于优先修复国家现有的堤防系统，其中许多系统目前对传统的洪水、飓风风暴潮或地震没有弹性。自然灾害研究的下一个前沿领域要求工程师为复杂问题开发实用的解决方案，这将需要在广泛的实际现场条件下测试民用基础设施系统。这种现场测试可以使用该设施的移动式动态振动器和相关仪器来完成。此外，为了发展更具弹性和可持续发展的社区，该设施将开展外联活动，以吸引和培养一批多样化和有才华的未来工程师，他们能够应对面临自然危险风险的老龄化基础设施支持的快速增长的人口所面临的挑战。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Experimental study of passive seismic vibration isolation by trench-type periodic barrier

• DOI: 10.1016/j.engstruct.2022.115308
• 发表时间: 2023-02
• 期刊: Engineering Structures
• 影响因子: 5.5
• 作者: Nagesh Ramaswamy;Bhagirath Joshi;Jiaji Wang;Xiaoliang Li;F. Menq;Xiaonan Shan;Kalyana Babu Nakshatrala;K. Stokoe;Y. Mo

Investigation of DSSI Effects on the Dynamic Response of an Overpass Bridge through the Use of Mobile Shakers and Numerical Simulations

通过使用移动振动台和数值模拟研究 DSSI 对立交桥动态响应的影响

• DOI: 10.1061/(asce)be.1943-5592.0001856
• 发表时间: 2022
• 期刊: Journal of Bridge Engineering
• 影响因子: 3.6
• 作者: Farrag, Sharef;Gucunski, Nenad;Cox, Brady;Menq, Farnyuh;Moon, Franklin;DeVitis, John
• 通讯作者: DeVitis, John

Multidirectional Vibroseis Shaking and Controlled Blasting to Determine the Dynamic In Situ Response of a Low-Plasticity Silt Deposit

• DOI: 10.1061/(asce)gt.1943-5606.0002924
• 发表时间: 2023-03
• 期刊: Journal of Geotechnical and Geoenvironmental Engineering
• 影响因子: 3.9
• 作者: A. Jana;A. Dadashiserej;Benchen Zhang;A. Stuedlein;T. Matthew Evans;K. Stokoe;B. Cox

Two-Dimensional Finite-Element Simulation of Periodic Barriers

周期性势垒的二维有限元模拟

• DOI: 10.1061/(asce)em.1943-7889.0001891
• 发表时间: 2021
• 期刊: Journal of Engineering Mechanics
• 影响因子: 3.3
• 作者: Huang, Hsuan Wen;Wang, Jiaji;Zhao, Chunfeng;Mo, Y. L.
• 通讯作者: Mo, Y. L.

Subsurface imaging dataset acquired at the Garner Valley Downhole Array site using a dense network of three-component nodal stations

使用三分量节点站的密集网络在加纳谷井下阵列站点获取的地下成像数据集

• DOI: 10.1177/87552930231209734
• 发表时间: 2023
• 期刊: Earthquake Spectra
• 影响因子: 5
• 作者: Vantassel, Joseph P.;Crocker, Jodie A.;Cox, Brady R.;Tran, Khiem
• 通讯作者: Tran, Khiem