Collaborative Research: Frame-Spine System with Force-Limiting Connections for Low-Damage Seismic Resilient Buildings

该项目将开发一种新的结构系统，在大地震中保护建筑物、建筑物内容物和居住者，并使地震后立即有人入住。这种抗震性结构系统对于医院等基本设施特别有价值，在这些设施中，必须防止建筑物和内容物受损，防止人员受伤，并且必须保持持续的入住率。新系统将使用实用的结构部件来经济地保护建筑物免受破坏性位移和加速的影响。该项目团队将与日本研究人员合作，使用位于日本三木的3D全尺寸地震测试设备(E-Defense)来研究新系统，进行全面的地震模拟，该设备由国家地球科学与灾难恢复研究所运营。该项目将通过防止人员伤亡和最大限度地减少大地震对建筑物的社会和经济破坏，促进国家的健康、繁荣和福利。将通过美国钢铁建筑学会夜校计划开发和提供一门关于弹性抗震设计的在线课程，全国各地的实习工程师、研究人员和学生将对此感兴趣。该项目的数据将存档在自然灾害工程研究基础设施(NHERI)数据仓库(https://www.DesignSafe-ci.org).该项目为国家科学基金会在国家减少地震灾害计划中的作用做出了贡献。本项目将开发的新型钢框架-脊柱限力连接(FLC)横向抗力体系将控制多振型地震反应，以保护建筑，并提供弹性结构和非结构建筑性能。这种框架-脊柱-FLC系统将依赖于一种传统的、经济的基础系统，该系统可以抵抗相当大比例的横向载荷。该系统明智地使用了地板水平的力限制可变形连接和弹性脊椎来保护基础系统。综合试验和数值模拟将提供对新的框架-脊椎-FLC体系的全面了解，包括丰富的关于三维激励下平面内、平面外和扭转组合反应的建筑抗震性能的全尺寸试验数据。这些氟碳化合物将使用利哈伊大学的NHERI设施进行测试。该项目将与日本正在进行的协同研究计划合作进行。来自这一美日一体化研究计划的广泛数据集将使我们能够对结构和非结构性能进行独特的比较，包括直接影响患者健康和安全的关键加速度敏感型医院内容。此外，该数据集将促进用于评估建筑性能的计算建模的进步，并开发用于设计的实用、准确的模型，以捕捉地震期间发生的复杂3D结构响应。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。

This project will develop a new structural system that will protect buildings, their contents, and occupants during large earthquakes and will enable immediate post-earthquake occupancy. This earthquake-resilient structural system will be particularly valuable for essential facilities, such as hospitals, where damage to buildings and contents and occupant injuries must be prevented and where continuous occupancy performance is imperative. The new system will use practical structural components to economically protect a building from damaging displacements and accelerations. The project team will collaborate with Japanese researchers to study the new system with full-scale earthquake simulations using the 3D Full-Scale Earthquake Testing Facility (E-Defense) located in Miki, Japan, and operated by the National Research Institute for Earth Science and Disaster Resilience. This project will advance national health, prosperity, and welfare by preventing injuries and loss of human life and minimizing social and economic disruption of buildings due to large earthquakes. An online course on resilient seismic design will be developed and offered through the American Institute of Steel Construction night school program, which will be of interest to practicing engineers, researchers, and students across the country. Data from this project will be archived in the Natural Hazards Engineering Research Infrastructure (NHERI) Data Depot (https://www.DesignSafe-ci.org). This project contributes to NSF's role in the National Earthquake Hazards Reduction Program. The novel steel frame-spine lateral force-resisting system with force-limiting connections (FLC) that will be developed in this project will control multi-modal seismic response to protect a building and provide resilient structural and non-structural building performance. This frame-spine-FLC system will rely on a conventional, economical base system that resists a significant proportion of the lateral load. The system judiciously employs floor-level force-limiting deformable connections and an elastic spine to protect the base system. Integrated experiments and numerical simulations will provide comprehensive understanding of the new frame-spine-FLC system, including rich full-scale experimental data on building seismic performance with combined in-plane, out-of-plane, and torsional response under 3D excitation. The FLCs will be tested using the NHERI facility at Lehigh University. This project will be conducted in collaboration with an ongoing synergistic research program in Japan. The extensive dataset from this integrated U.S.-Japan research program will enable unique comparisons of structural and non-structural performance, including critical acceleration-sensitive hospital contents that directly affect the health and safety of patients. In addition, the dataset will enable the advancement of computational modeling for the assessment of building performance and the development of practical, accurate models for use in design that capture the complex 3D structural response that occurs during an earthquake.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.