RII Track-4: Quantifying Seismic Resilience of Multi-Functional Floor Isolation Systems through Cyber-Physical Testing

RII Track-4：通过网络物理测试量化多功能地板隔离系统的抗震能力

• 批准号: 1929151
• 负责人: Philip Harvey
• 金额: $ 18.26万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-12-01 至 2022-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1929151&HistoricalAwards=false
• 关键词: RII; Track; Quantifying; Seismic; Resilience

Damage caused by seismic events to buildings and their contents can impact life safety and disrupt business operations following an earthquake. The resulting social and economic losses can be minimized, or even eliminated, by reducing the seismic forces on building contents through vibration isolation. Floor isolation systems (FISs), in particular, are a promising retrofit strategy for protecting vital building contents and enhancing a community's seismic resilience. This project will establish an experimental testbed and test protocol for FISs, utilizing the state-of-the-art NSF-funded Natural Hazards Engineering Research Infrastructure (NHERI) Experimental Facility at Lehigh University. Through the tests conducted during extended research visits, the PI and a graduate student will assess the performance of FISs and advance the understanding of their underlying physics, while also receiving hands-on training on the unique cyber-physical testing capabilities at Lehigh called real-time hybrid simulation. The new techniques and knowledge learned through these visits will transform the way the PI conducts research at the University of Oklahoma through the integration of real-time hybrid testing on existing facilities. This will have a lasting impact on the training of undergraduate and graduate students and researchers at the PI's home institution. A community's resilience to seismic hazards is defined by its ability to absorb an extreme event and maintain an acceptable level of functionality following the event. To help ensure a more resilient community and a safer environment, the proposed research will rigorously evaluate a design methodology developed in the PI's lab for multi-functional FISs incorporating building-FIS interactions. This will be achieved by utilizing a cyber-physical systems based approach, namely real-time hybrid simulation, leveraging the state-of-the-art facilities at Lehigh University. The overall aim of these tests is to: (a) extend real-time hybrid simulation algorithms to seismic isolation systems; (b) experimentally validate physics-based mathematical models for resilient FISs; (c) advance the understanding of the underlying nonlinear dynamics of these systems; and (d) quantify the performance of these systems incorporating multi-scale (building-FIS) interactions. The cyber-physical tests conducted during the extended research visits will help to clarify the fundamental limitations of resilient isolation systems and quantify their achievable performance with respect to resilience goals. These tests constitute the first ever real-time hybrid simulation of FISs, in particular, and multi-axial hybrid testing of seismic isolation devices, in general. This research has the potential to lower the repair and demolition costs of post-earthquake recovery, including damage to non-structural elements/contents, save lives, and provide immediate operation for critical facilities.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.

地震及其内容的地震事件造成的损害会影响生命安全，并破坏地震后的业务行动。可以通过通过振动隔离来减少建筑物内容的地震力来最大程度地减少或甚至消除所产生的社会和经济损失。尤其是地板隔离系统（FISS）是一种有希望的改造策略，可保护重要的建筑物内容并增强社区的地震弹性。该项目将利用Lehigh University的最先进的NSF资助的自然危害工程研究基础设施（NHERI）实验设施，为FIS建立实验性测试台和测试协议。通过在扩展研究访问期间进行的测试，PI和研究生将评估FISS的表现，并提高对其潜在物理学的理解，同时还接受了Lehigh在Lehigh的独特网络物理测试能力的动手培训，称为实时混合仿真。通过这些访问学到的新技术和知识将通过对现有设施的实时混合测试的整合来改变PI在俄克拉荷马大学进行研究的方式。这将对PI家庭机构的本科生和研究生以及研究人员的培训产生持久影响。社区对地震危害的韧性是由其吸收极端事件并保持事件后可接受的功能水平的能力来定义的。为了帮助确保一个更具弹性的社区和更安全的环境，拟议的研究将严格评估PI实验室中开发的设计方法，用于将建筑物 - 互动的多功能fiss进行。这将通过利用基于网络物理系统的方法，即实时混合模拟，并利用Lehigh University的最新设施来实现。这些测试的总体目的是：（a）将实时混合模拟算法扩展到地震隔离系统； （b）实验验证了基于物理的数学模型，以进行弹性裂缝； （c）提高对这些系统的基本非线性动力学的理解； （d）量化这些系统的性能，这些系统结合了多尺度（建筑物）相互作用。在扩展研究访问期间进行的网络物理测试将有助于阐明弹性隔离系统的基本局限性，并在弹性目标方面量化其可实现的性能。这些测试通常构成了植物的第一个实时混合模拟，尤其是地震隔离设备的多轴杂种测试。这项研究有可能降低地震后恢复的维修和拆除成本，包括对非结构性元素/内容的损害，挽救生命，并为关键设施提供立即的操作。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识绩效和更广泛影响的评估来通过评估来获得支持的。

项目成果

Mitigation of Seismic Risk to Critical Building Contents via Rolling Pendulum Isolation Systems: Multi-Directional Hybrid Shake Table Tests

通过滚动摆隔震系统减轻关键建筑内容的地震风险：多向混合振动台测试

• DOI: 10.17603/ds2-7cjc-5n58
• 发表时间: 2021
• 期刊: Designsafe-CI
• 作者: Torres Burgos, Daleen;Harvey, Philip;cao, liang;Villalobos Vega, Esteban;Ricles, James
• 通讯作者: Ricles, James

A dual-mode floor isolation system to achieve vibration isolation and absorption: Experiments and theory

• DOI: 10.1016/j.jsv.2022.116757
• 发表时间: 2022-01-29
• 期刊: JOURNAL OF SOUND AND VIBRATION
• 影响因子: 4.7
• 作者: Bin, P.;Harvey, P. S., Jr.
• 通讯作者: Harvey, P. S., Jr.

Characterization and real‐time hybrid simulation testing of rolling pendulum isolation bearings with different surface treatments

不同表面处理的滚摆隔震轴承的表征和实时混合模拟测试

• DOI: 10.1002/eqe.3694
• 发表时间: 2022
• 期刊: Earthquake Engineering & Structural Dynamics
• 影响因子: 4.5
• 作者: Covarrubias Vargas, Braulio A.;Harvey, Jr., P. Scott;Cao, Liang;Ricles, James M.;Al‐Subaihawi, Safwan;Villalobos Vega, Esteban
• 通讯作者: Villalobos Vega, Esteban

Research Experiences for Undergraduates (REU), NHERI 2022: 3D Model of a Concentrically Braced Frame for Real-Time Hybrid Simulation

本科生研究经验 (REU)，NHERI 2022：用于实时混合仿真的同心支撑框架 3D 模型

• DOI: 10.17603/ds2-pkq3-ck17
• 发表时间: 2022
• 期刊: Designsafe-CI
• 作者: Ricles, James;Harvey, Philip;Villalobos Vega, Esteban;Karras, Jamie
• 通讯作者: Karras, Jamie

Real-Time Hybrid Simulation Study of a Rolling Pendulum Equipment Isolation System

滚摆设备隔离系统的实时混合仿真研究

• 发表时间: 2021
• 期刊: The University of Oklahoma Libraries
• 作者: Covarrubias Vargas, B. A.