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

该奖项是NSF 08-519项目招标的结果，“小乔治·e·布朗地震工程模拟（NEES）研究网络（NEESR）”竞赛，包括华盛顿大学（牵头机构）、明尼苏达大学（次级奖项）和纽约州立大学布法罗大学（次级奖项）。​该项目的目标是开发一种智能且具有弹性的钢板剪力墙（SR-SPSW）系统，该系统有可能改变中高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势，创造了一个坚固、延展性好、易于修复的系统，这将降低建筑物的生命周期成本。大多数传统的抗震体系在地震事件中会遭受结构破坏；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是自定心技术的理想应用对象；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我感知概念，这样就可以在最小破坏的情况下做出关于腹板更换的事后决策。地震荷载作用下SPSW的性能高度非线性，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重新定心机制中的力之间的相互作用。采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提供对系统响应的新层次的理解，并有助于消除过于保守的设计过程。为了确保新的SR-SPSW系统的实施，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，包括对耦合SPSW行为的理解和多层SPSW的预期产量分布。该项目还包括一系列活动，这些活动将促进NEES的教育、外联和培训目标。通过与西雅图mesa的合作，该项目将吸引来自代表性不足的少数民族的高中生参与结构工程和实验室实验，最终有助于促进工程和科学的多样性。项目团队还包括来自西雅图大学的教师和本科生，这是一个以本科生为主的机构，他们将为研究工作做出贡献。该项目将通过Wicked Walls项目的发展激发K-5学生对科学和工程的兴趣；这是一项动手学习活动，向学生展示了墙壁在抗震方面的好处。最后，与AISC合作，通过地震规定委员会、会议演讲和研讨会，向执业结构工程师进行外展。研究团队在制定国家和国际规范方面的经验确保了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。

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).