CAREER: Non-traditional Materials Application for Seismic and Wind Loads

职业：非传统材料在地震和风荷载中的应用

• 批准号: 1350605
• 负责人: Jason McCormick
• 金额: $ 40万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-05-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1350605&HistoricalAwards=false
• 关键词: CAREER; Non; traditional; Materials; Application

The objective of this Faculty Early Career Development (CAREER) Program award is to pursue applications of non-traditional civil engineering materials to enhance passive damping in steel structures spanning from low-rise systems to tall buildings. This work will allow for customized and controlled energy dissipation throughout the structure leading to safety and serviceability of buildings subjected to wind and seismic loads. Non-traditional materials to be considered are metal foam, rubber, and others filled in the gaps between flanges of steel beams and as filler in tubular sections. The application of non-traditional materials to multiple loading scenarios can lead to long-term welfare, economic prosperity, and safety of communities. The results will be a more homogenized design of structures that provides an optimal performance regardless of the loading or building configuration. The cross-disciplinary nature of this concept also provides a unique opportunity to increase awareness of the science, technology, engineering, and mathematics fields in young, diverse, and impressionable elementary school students. The elementary school teachers are targeted to increase understanding of science and mathematics concepts for buildings. The project will promote creativity in engineering students and to influence practitioners in future design of buildings.Dynamic loads acting on steel structures, such as those caused by earthquake or wind events, have caused significant structural and/or non-structural damage bringing into question the resiliency and robustness of these structures. Under seismic loads, steel structures are designed to dissipate input energy through the formation of 'plastic hinges' resulting in permanent deformation in buildings, while the repeated wind loads on tall buildings can result in large drifts and accelerations leading to damage to nonstructural elements and the perception of motion by building occupants. The specific goal of this project is to address these concerns of the resiliency and robustness of steel structures. To achieve this goal, the behavior of non-traditional materials such as metal foam and rubber will be characterized under a variety of loading scenarios typically caused by seismic and wind events. Finite element models that are calibrated to the material characterization findings will be used to evaluate potential placement strategies of these high damping materials to best utilize their inherent properties. Full-scale sub-assemblies containing the damping materials will be experimentally tested to evaluate the performance of the applications in a variety of structural configurations under both seismic and wind loads. These findings will allow for the development of models to evaluate the performance of the mitigation strategies in reducing the response of various structural configurations. Education modules will be developed by and for elementary school teachers to help them educate students. Education of university students will be achieved through experiences as research assistants and incorporation of research findings in the curriculum.

该学院早期职业发展（Career）计划奖的目标是追求非传统土木工程材料的应用，以增强从低层系统到高层建筑的钢结构的被动阻尼。这项工作将允许在整个结构中定制和控制能量耗散，从而使建筑物在风和地震荷载下的安全性和可维护性。要考虑的非传统材料是金属泡沫、橡胶和其他填充在钢梁法兰之间的间隙和管状截面的填料。非传统材料在多种荷载情况下的应用可以带来长期的福利、经济繁荣和社区安全。结果将是一个更加均匀的结构设计，无论负载或建筑配置如何，都能提供最佳性能。这个概念的跨学科性质也提供了一个独特的机会，以提高年轻，多样化和易受影响的小学生对科学，技术，工程和数学领域的认识。小学教师的目标是增加对建筑的科学和数学概念的理解。该项目将促进工程学生的创造力，并影响未来建筑设计的实践者。作用在钢结构上的动力载荷，如由地震或风力事件引起的动力载荷，已经造成了重大的结构和/或非结构损伤，使这些结构的弹性和稳健性受到质疑。在地震荷载下，钢结构被设计成通过形成“塑料铰链”来耗散输入能量，从而导致建筑物永久变形，而高层建筑上反复的风荷载会导致大的漂移和加速度，从而导致非结构元件的损坏和建筑物居住者对运动的感知。该项目的具体目标是解决钢结构的弹性和坚固性问题。为了实现这一目标，非传统材料（如金属泡沫和橡胶）的性能将在各种荷载情景下进行表征，这些荷载通常由地震和风力事件引起。根据材料表征结果校准的有限元模型将用于评估这些高阻尼材料的潜在放置策略，以最好地利用其固有特性。包含阻尼材料的全尺寸子组件将进行实验测试，以评估在地震和风荷载下各种结构配置下的应用性能。这些发现将有助于建立模型，以评估缓解战略在减少各种结构构型的响应方面的绩效。教育模块将由小学教师开发，并为他们开发，以帮助他们教育学生。对大学生的教育将通过担任研究助理的经历和将研究成果纳入课程来实现。