Novel and Emerging Technologies for Sustainable and Seismically Resilient Infrastructure

可持续和抗震基础设施的新技术和新兴技术

• 批准号: RGPIN-2020-05034
• 负责人: Alam, Shahria
• 金额: $ 3.13万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=761637
• 关键词: Novel; Emerging; Technologies; Sustainable; Seismically

A major portion of Canadian civil infrastructure has passed its service life. Our infrastructure deficit is increasing at $2B/year. The Insurance Bureau of Canada 2013 report estimated the probable loss after a 9-magnitude earthquake in BC at $75B and a $61B after a 7-magnitude earthquake in the Quebec City-Montreal-Ottawa corridor - a clear reflection of our vulnerable infrastructure. Hence, it is imperative to take immediate measures to develop innovative, low-cost, and reliable construction and retrofit solutions for our infrastructure. The proposed research program aims to reduce seismic vulnerability through innovations in structural systems and transfer of knowledge to practice. Although conventional structural design can save lives during earthquakes, the infrastructure suffers major damage and often requires replacement which negatively impacts sustainability. Hence, it is absolutely critical to bring innovation to structural design so that our infrastructure is not compromised during earthquakes. The proposed program objectives will enable leading-edge research to develop (a) innovative low-cost segmental post-tensioned structural systems having self-centering capability to reduce the risk of major damage following an earthquake; (b) novel friction-based self-centering bracing device to substantially reduce potential damage and improve the service life of new and deficient infrastructure; and (c) innovative isolation and damping devices for seismic protection of structures. In current construction practice, buildings and bridges are designed such that they will dissipate seismic energy by undergoing large lateral drift and yielding of critical components causing substantial damage during a major earthquake. In most cases, the structures are not repairable, resulting in significant economic loss. The rebuilding is also economically and environmentally costly and time-consuming. The proposed research will address this critical need by developing innovative construction techniques using vertically post-tensioned prefabricated elements and connection details, and novel retrofitting techniques for older structures. Besides, superelastic shape memory alloy (SMA) in the form of rebar, strand and cable will be utilized along with regular steel for developing self-centering devices that can help the structure bring back to its plumb position after earthquakes. This research program is well aligned with the global demand in innovative systems, technologies, and processes, and entrepreneurship, and finally, sustainable development. This research program will provide excellent opportunities to train multiple highly qualified personnel made up of a diversified group at UBC who will constitute the next generation of Canada's high-tech engineering workforce.

加拿大民用基础设施的大部分已经过了使用寿命。我们的基础设施赤字每年增加 20 亿美元。加拿大保险局 2013 年报告估计，BC 省发生 9 级地震后的可能损失为 $75B，魁北克市 - 蒙特利尔 - 渥太华走廊发生 7 级地震后的可能损失为 $61B - 这清楚地反映了我们脆弱的基础设施。因此，当务之急是立即采取措施，为我们的基础设施开发创新、低成本、可靠的建设和改造解决方案。拟议的研究计划旨在通过结构系统创新和知识转化为实践来减少地震脆弱性。尽管传统的结构设计可以在地震期间挽救生命，但基础设施会遭受重大损坏，并且经常需要更换，这会对可持续性产生负面影响。因此，为结构设计带来创新绝对至关重要，这样我们的基础设施在地震期间不会受到损害。拟议的计划目标将使前沿研究能够开发（a）具有自定心能力的创新低成本节段后张结构系统，以降低地震后重大损坏的风险； (b) 新型摩擦式自定心支撑装置，可大幅减少潜在损害并提高新的和有缺陷的基础设施的使用寿命； (c) 用于结构抗震保护的创新隔离和阻尼装置。在当前的建筑实践中，建筑物和桥梁的设计使得它们能够通过承受大的横向位移和关键部件的屈服来消散地震能量，从而在大地震期间造成严重损坏。在大多数情况下，建筑物无法修复，从而造成重大经济损失。重建在经济和环境方面也成本高昂且耗时。拟议的研究将通过开发使用垂直后张预制构件和连接细节的创新施工技术以及针对旧结构的新颖改造技术来满足这一迫切需求。此外，钢筋、钢绞线和电缆形式的超弹性形状记忆合金（SMA）将与普通钢材一起用于开发自定心装置，帮助结构在地震后恢复到垂直位置。该研究项目非常符合全球对创新系统、技术、流程、创业精神以及可持续发展的需求。该研究项目将为在 UBC 培养由多元化团队组成的多名高素质人才提供绝佳的机会，他们将构成加拿大下一代高科技工程劳动力。