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

该创新技术转化伙伴关系（PFI-TT）项目的更广泛影响/商业潜力是创建一个全尺寸的地震减震器，可以确保强震后建筑物的快速恢复和重新占用。在大地震事件发生后，建筑物重新集中的能力会强烈影响震后建筑物的停机时间，并带来重大的经济后果。所提出的系统可以减轻当前设计中的缺点，并解决危险事件后的持续功能。该项目旨在通过揭示全尺寸地震阻尼器的循环响应、失效行为和可修复性，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、实用的抗震减震器，具有非牺牲耗能和高定心能力。计算建模将补充这些实验活动，并允许模拟所提出的设备及其失效模式，并将模型包含在可靠地分析建筑物的响应中。该项目还将导致制定自定心阻尼系统的易损性规范，这将使使用此类系统设计的建筑物能够准确地进行地震损失和功能评估。该研究将为采用所建议的阻尼器的建筑物的设计提供建议，以便在震后重新占用和功能恢复时间方面轻松实现高抗震性能目标。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值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.