NEESR-SG: Performance-Based Design and Real-time Large-scale Testing to Enable Implementation of Advanced Damping Systems

该奖项是NSF 08-519项目征集乔治·e·布朗地震工程模拟（NEES）研究网络（NEESR）竞赛的结果，包括普渡大学（牵头机构）、利哈伊大学（次级奖项）、伊利诺伊大学香槟分校（次级奖项）、纽约城市大学（次级奖项）和康涅狄格大学（次级奖项）。该项目将利用利哈伊大学的NEES设备站点。先进的阻尼系统在减轻地震灾害方面表现出了巨大的希望。使用这些多功能装置的结构对恶劣载荷条件的适应性有望促进实现基于性能的结构设计能力的重大进步。然而，由于缺乏适当的设计程序和足够的测试方法来验证这些系统，这种创新系统在实践中应用缓慢。该技术的有效实施需要建立和验证基于性能的设计方法，以最好地利用其独特的阻尼能力。大型结构的伪动态（PSD）试验方法是实现模型验证和性能评估的最佳方法。然而，当这些阻尼器集成到结构系统中时，它们会表现出几种复杂的行为，而这些行为在不到实时的情况下无法充分再现。最近开发的实时混合测试方法允许在可测试的结构和系统类型方面具有更大的能力。这些方法需要对复杂的结构体系进行验证。这些都是进行一项综合研究的令人信服的理由，重点是对配备了这种阻尼装置的结构进行大规模测试，以：i)展示采用先进阻尼装置的结构系统的典型基于性能的设计方法；Ii)验证适当的大规模测试技术，以验证和接受新的阻尼系统；iii)验证本课程中大型结构系统的新型实时PSD测试方法；iv)对从业者和学生进行这些技术的教育，使先进的阻尼系统在美国得以实施。磁流变流体装置是一种特别有前途的阻尼系统，将在实验中使用，以利用先前的资金。如果使用得当，这些设备还可以模拟各种各样的被动阻尼系统，为未来的研究人员建立一个测试平台。该项目将开发适当的基于性能的设计程序和先进阻尼系统的仿真能力，并验证此类土木工程应用的阻尼技术，实现NEES背后的基本愿景。大规模复杂结构的有效实时PSD测试方法的成功验证，将打破目前阻碍此类创新系统大规模验证的障碍，并将使整个NEES的实时PSD测试成为可能，从而实现比以前测试过的更复杂结构的复杂测试。与欧洲、日本和中国的研究人员建立了国际合作伙伴关系，以借鉴相关专业知识，提高这一综合研究和教育计划的影响。工业合作者将为实践工程社区提供观点和需求。教育和技术转让计划的重点是针对各个层次的不同受众，包括：通过研究、课程模块和测试程序和设备培训的研究生和本科生；区域K-12学生通过现有的合作伙伴关系；和实习工程师通过NEES网络研讨会。为了进一步增加代表性不足的学生参与这些研究和教育机会，纽约城市学院（少数族裔机构，西班牙裔服务机构和LSAMP成员）是这一努力的各个方面的合作伙伴。该项目网站将为感兴趣的研究人员、实践工程师和学生提供教育成果和信息。NEES工具和能力将在进行实验、项目执行以及数据存档和共享方面发挥不可或缺的作用。该项目的数据将通过NEES数据存储库（http://www.nees.org）提供。

This award is an outcome of the NSF 08-519 program solicitation George E. Brown Jr. Network for Earthquake Engineering Simulation (NEES) Research (NEESR) competition and includes Purdue University (lead institution), Lehigh University (subaward), the University of Illinois Champaign-Urbana (subaward), City University of New York City College (subaward), and the University of Connecticut (subaward). This project will utilize the NEES equipment site at Lehigh University. Advanced damping systems have demonstrated great promise for seismic hazard mitigation. The adaptability of structures using these versatile devices to severe loading conditions is expected to facilitate major advances in the ability to achieve performance-based design of structures. However, such innovative systems have been slow to be used in practice due to a lack of appropriate design procedures and adequate testing methods to validate these systems. Effective implementation of this technology will require establishing and validating performance-based design methodologies that best exploit their unique damping capabilities. Large-scale testing for model validation and performance assessment can best be achieved through pseudo dynamic (PSD) test methods on large scale structures. However, when these dampers are integrated into a structural system, they exhibit several types of complex behaviors that cannot adequately be reproduced at less than real-time. Recently developed real-time hybrid testing methods allow greater abilities regarding the types of structures and systems that can be tested. These methods need to be validated for complex structural systems. These are compelling reasons for conducting an integrated study focusing on large-scale testing of structures equipped with such damping devices to: i) demonstrate a typical performance-based design methodology for a structural system employing advanced damping devices; ii) validate an appropriate large-scale testing technique for validation and acceptance of new damping systems; iii) validate novel real-time PSD testing methodologies for large-scale structural systems in this class; and iv) educate practitioners and students on these technologies, enabling implementation of advanced damping systems in the United States. Magnetorheological fluid devices, a particularly promising damping system, will be used in the experiments to leverage prior funding. With proper use, these devices can also mimic a wide variety of passive damping systems, allowing for establishment of a testbed for future researchers. This project will result in the development of appropriate performance-based design procedures and simulation capabilities regarding advanced damping systems, as well as validation of such damping technologies for civil engineering applications, realizing the fundamental vision behind NEES. The successful validation of an effective real-time PSD testing method for large-scale, complex structures will break down the barriers currently preventing the validation of such innovative systems at large-scale, and will enable real-time PSD testing throughout NEES, leading to the possibility of sophisticated testing of more complex structures than have ever been tested before. International partnerships with researchers in Europe, Japan and China are established to draw upon relevant expertise and to enhance the impact of this integrated research and education program. Industrial collaborators will provide the perspective of and needs for the practicing engineering community. Education and technology transfer plans are focused on targeting a diverse audience at all levels including: graduate and undergraduate students through research, course modules, and training on testing procedures and equipment; regional K-12 students through existing partnerships; and practicing engineers through a NEES webinar. To further increase the participation of underrepresented students in these research and educational opportunities, City College of New York (a minority institution, a Hispanic serving institution and LSAMP member) is a partner in all aspects of this effort. The project website will house educational outcomes and information for interested researchers, practicing engineers and students. NEES tools and capabilities will play an integral role in conducting the experiments, project execution, and archiving and sharing the data. Data from this project will be made available through the NEES data repository (http://www.nees.org).