NEESR-SG: Smart and Resilient Steel Walls for Reducing Earthquake Impacts

NEESR-SG：用于减少地震影响的智能且有弹性的钢墙

• 批准号: 0830294
• 负责人: Jeffrey Berman
• 金额: $ 153.11万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-10-01 至 2014-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0830294&HistoricalAwards=false
• 关键词: NEESR; SG; Smart; Resilient; Steel

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 the University of Washington (lead institution), University of Minnesota (subaward), and University at Buffalo, SUNY (subaward). This project will utilize the NEES equipment sites at the University of Minnesota and University at Buffalo and has strong international collaboration with large-scale experiments to be performed at the National Center for Research in Earthquake Engineering (NCREE) in Taiwan. The goal of this project is to develop a smart and resilient steel plate shear wall (SR-SPSW) system with the potential to transform seismic design in areas of moderate and high seismicity. The system strategically combines the benefits of self-centering and steel plate shear wall technologies to create a robust, ductile, and easily repairable system that will reduce life-cycle costs for buildings. Most traditional seismic load resisting systems will suffer structural damage during seismic events; the cost and downtime associated with repair of that damage has led to staggering economic losses. The proposed SR-SPSW system could drastically reduce those losses. SPSWs are excellent candidates for the application of self-centering technology; they have high strength and elastic stiffness and require low re-centering forces. The buckling and yielding behavior of the web plate will also be leveraged to develop self-sensing concepts such that post-event decisions regarding web plate replacement can be made with minimal disruption. SPSW behavior under earthquake loading is highly nonlinear, and complex component interactions exist; of particular complexity are the interactions between the web plate tension field action and the forces in the re-centering mechanisms of the proposed SR-SPSWs. Large-scale testing using advanced experimental techniques and instrumentation will generate data to be used to develop numerical models anchored in physical behavior. Application of those tools in parametric analyses of SPSW systems will provide a new level of understanding of the system response and help to eliminate overly conservative design processes. To ensure that the new SR-SPSW system will be implemented, and to increase the use of conventional SPSW systems, this research will also seek to fill critical knowledge gaps in SPSW system behavior including the understanding of coupled SPSW behavior and the expected distribution of yielding in multistory SPSW. The project also includes a series of activities that will advance the NEES education, outreach, and training goals. Through collaboration with Seattle-MESA, the project will engage high school students from underrepresented minorities in structural engineering and laboratory experimentation, ultimately helping to promote diversity in engineering and science. The project team also includes faculty and undergraduates from Seattle University, a predominantly undergraduate institution, who will contribute to the research endeavor. The project will excite K-5 students about science and engineering through the development of the Wicked Walls program; a hands on learning activity showing students the benefits of walls for seismic resistance. Finally, outreach to practicing structural engineers will occur through the Seismic Provisions committee, conference presentations, and seminars with the cooperation of AISC. The research team experience in developing national and international codes ensures that research outcomes will have an immediate impact on design practice. Data from this project will be made available through the NEES data repository (http://www.nees.org).

该奖项是 NSF 08-519 项目征集“George E. Brown, Jr. 地震工程模拟 (NEES) 研究网络 (NEESR)”竞赛的结果，包括华盛顿大学（牵头机构）、明尼苏达大学（subaward）和纽约州立大学布法罗分校（subaward）。该项目将利用明尼苏达大学和布法罗大学的 NEES 设备场地，并与在台湾国家地震工程研究中心 (NCREE) 进行的大规模实验进行强有力的国际合作。该项目的目标是开发一种智能且有弹性的钢板剪力墙（SR-SPSW）系统，该系统有可能改变中度和高度地震活动地区的抗震设计。该系统战略性地结合了自定心和钢板剪力墙技术的优点，创建了一个坚固、延展且易于维修的系统，从而降低了建筑物的生命周期成本。大多数传统的抗震系统在地震过程中都会遭受结构损坏；与修复损坏相关的成本和停机时间导致了惊人的经济损失。拟议的 SR-SPSW 系统可以大大减少这些损失。 SPSW 是应用自定心技术的优秀候选者；它们具有高强度和弹性刚度，并且需要低的重新定心力。腹板的屈曲和屈服行为也将被用来开发自感知概念，以便可以在最小的干扰下做出有关腹板更换的事后决策。 SPSW在地震荷载下的行为是高度非线性的，并且存在复杂的构件相互作用；特别复杂的是腹板张力场作用与所提出的 SR-SPSW 重新定心机构中的力之间的相互作用。使用先进实验技术和仪器的大规模测试将产生数据，用于开发基于物理行为的数值模型。这些工具在 SPSW 系统参数分析中的应用将使对系统响应的理解达到一个新的水平，并有助于消除过于保守的设计过程。为了确保新的 SR-SPSW 系统得到实施，并增加传统 SPSW 系统的使用，本研究还将寻求填补 SPSW 系统行为的关键知识空白，包括理解耦合 SPSW 行为和预期的产量分布在多层 SPSW 中。 该项目还包括一系列旨在推进 NEES 教育、推广和培训目标的活动。通过与西雅图-MESA 合作，该项目将让少数族裔的高中生参与结构工程和实验室实验，最终帮助促进工程和科学的多样性。该项目团队还包括来自西雅图大学（以本科生为主的机构）的教职员工和本科生，他们将为研究工作做出贡献。该项目将通过开发 Wicked Walls 项目激发 K-5 学生对科学和工程的兴趣；一项实践学习活动，向学生展示墙壁抗震的好处。最后，将与 AISC 合作，通过抗震规定委员会、会议演讲和研讨会向执业结构工程师进行推广。研究团队在制定国家和国际规范方面的经验确保研究成果将对设计实践产生直接影响。该项目的数据将通过 NEES 数据存储库 (http://www.nees.org) 提供。