PFI-TT: Self-Centering Seismic Dampers for Resilience-Based Earthquake Design of Buildings

这一创新-技术转化伙伴关系(PFI-TT)项目的更广泛的影响/商业潜力是创造一个全面的地震阻尼器，可以确保建筑物在强烈地震后迅速恢复和重新使用。结构在大地震后重新定位的能力强烈影响地震后建筑物的停工时间，并带来重大的经济后果。建议的系统可以缓解当前设计中的缺陷，并解决在发生危险事件后的持续功能。该项目旨在通过揭示全尺寸阻尼器的循环响应、失效行为和可维修性来推进基于形状记忆合金的地震控制装置的知识。本项目提出了一种自定心、可重复使用、实用的抗震阻尼器，提供了具有高重新定心能力的非牺牲性耗能。计算建模将补充这些实验活动，并允许模拟所建议的设备及其故障模式，并将模型纳入可靠的建筑物响应分析。该项目还将导致制定自定心减震系统的易损性规范，这将使使用这种系统设计的建筑物能够准确地进行地震损失和功能评估。这项研究将为带有所建议阻尼器的建筑物的设计提供建议，以便于实现在地震后重新入住率和功能恢复时间方面所述的高抗震性能目标。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。

The broader impact/commercial potential of this Partnerships for Innovation - Technology Translation (PFI-TT) project is to create a full-scale seismic damper that can ensure rapid recovery and reoccupation of buildings after a strong earthquake. A structure’s ability to re-center after a large seismic event strongly affects post-earthquake building downtime, with significant economic consequences. The proposed system can mitigate the drawbacks in current design and address the continued functionality after a hazard event. The proposed project seeks to advance the knowledge in shape memory alloy-based seismic control devices by revealing cyclic response, failure behavior, and repairability of a full-scale seismic damper. This project advances a self-centering, re-usable and practical seismic damper providing non-sacrificial energy dissipation with high re-centering capabilities. Computational modeling will supplement these experimental campaigns and allow simulation of the proposed devices and their failure modes and inclusion of models in reliably analyzing response of buildings. This project will also lead to formulation of fragility specifications for a self-centering damping system, which will enable accurate seismic loss and functionality assessments of buildings designed with such systems. The research will provide recommendations for the design of buildings with the proposed dampers such that high seismic performance objectives stated in terms of post-earthquake re-occupancy and functional recovery time are easily achieved.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.