ICorps: Metamaterial for enhanced seismic protection of buildings

该项目为现有和新结构的隔震和耗能技术提供了一种经济实惠的替代方案。这支创新队（I-Corps）将探索一种新型超材料的商业化，以增强建筑物的抗震保护。超材料是一种人造材料，由于其内部结构的优化设计而具有不同寻常的特性。超材料在包括汽车、航空航天和重型机械工业在内的广泛领域都有应用。例如，当插入建筑物时，该项目的超材料能够吸收地震时地面震动产生的大部分振动能量，并释放结构元件的应力，从而防止结构损坏。这种超材料通过低成本的制造工艺生产，是一种经济实惠的技术，可以将新建和现有结构的抗震保护提高到目前为止仅在关键建筑和基础设施中实现的水平。建筑业主将从这项技术的使用中受益，因为它提高了安全性，降低了维修成本，并在地震后延长了可操作性。大规模使用这项技术将使社区对地震更有弹性，并减少美国和世界各地地震事件的社会和经济影响。超材料通常由塑料和金属等复合材料组装而成，以获得增强的材料性能。然而，该团队的技术依赖于使用高温钎焊从现成的钢组件制造的超材料，以降低成本达到理想的设计要求。由壳、板和轴承芯组成的单元格的分层周期性组装用于模拟橡胶样的灵活性，通过壳的滞后变形增强能量耗散能力。通过优化各种设计参数，包括本构材料特性、几何形状、壳的数量和间距、轴承芯的尺寸和几何形状，可以对超材料特性进行微调，以适应特定的应用。在建筑市场上提供低成本的增强型地震保护技术，有可能促进增强型地震保护系统的应用。这将减少重大地震事件后个人和社区的间接损失。NSF创新团队计划（I-Corps团队）的资源将提供洞察力，通过客户访谈，这种地震技术在市场上的可行性，有关期望需求的信息，技术开发的资金，以及技术商业化的过渡计划。

This project provides an affordable alternative to current technologies for seismic isolation and energy dissipation in existing and new structures.This Innovation Corps (I-Corps) team will explore the commercialization of a new metamaterial for enhanced seismic protection of buildings. Metamaterials are man-made materials which possess unusual characteristics, stemming from the optimal design of their internal architecture. Metamaterials have applications in a broad range of areas including the automotive, aerospace, and heavy machinery industry. For example, when inserted into a building, this project's metamaterial is capable of absorbing most of the vibration energy produced by ground shaking during an earthquake and releasing stresses from structural elements, thus preventing structural damages. Produced through a low-cost manufacturing process, this metamaterial is an affordable technology that will raise the seismic protection of new and existing structures to levels so far achieved only in critical buildings and infrastructure. Building owners will benefit from the use of this technology in terms of enhanced safety, reduced repair costs, and extended operability after earthquakes. Large-scale use of this technology will enable communities to become more resilient to earthquakes and reduce social and economic impacts of seismic events in the US and worldwide. Metamaterials are typically assembled from composite materials such as plastic and metal to achieve enhanced material properties. However, this team's technology relies on a metamaterial manufactured from off-the-shelf steel components using high temperature brazing to achieve desirable design requirements at a reduced cost. A layered periodic assembly of unit cells made of shells, plates, and bearing cores is used to mimic rubber-like flexibility, with augmented energy dissipation capability through hysteretic deformation of the shells. The metamaterial properties can be fine-tuned for specific applications through optimization of a variety of design parameters, including constitutive material properties, geometry, number, and spacing of the shells, size and geometry of the bearing cores. Availability of a low-cost enhanced seismic protection technology in the construction market has the potential of fostering the application of enhanced seismic protection systems. This will reduce individual and community indirect losses after major seismic events. NSF Innovation Corps Teams Program (I-Corps Teams) resources will provide insight, through customer interviews of the viability of this seismic technology in the marketplace, information regarding desired requirements, funds for technology development, and a transition plan for commercializing the technology.