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超过了使用寿命。我们的基础设施赤字正在以每年20亿美元的速度增长。加拿大保险局2013年的报告估计，不列颠哥伦比亚省9级地震后可能造成的损失为750亿美元，魁北克市-蒙特利尔-渥太华走廊7级地震后可能造成的损失为610亿美元-这清楚地反映了我们脆弱的基础设施。因此，必须立即采取措施，为我们的基础设施开发创新、低成本和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的创新和将知识转化为实践来减少地震脆弱性。虽然传统的结构设计可以在地震中挽救生命，但基础设施遭受重大破坏，往往需要更换，这对可持续性产生了负面影响。因此，将创新引入结构设计至关重要，这样我们的基础设施就不会在地震中受损。拟议的计划目标将使前沿研究能够开发（a）创新的低成本分段后张结构系统，具有自定心能力，以减少地震后重大破坏的风险;（B）新型的基于摩擦的自定心支撑装置，以大大减少潜在的破坏，并提高新的和有缺陷的基础设施的使用寿命;以及（c）为建筑物提供抗震保护的创新隔离和减震装置。在当前的施工实践中，建筑物和桥梁的设计使得它们将通过经受大的侧向漂移和关键部件的屈服来耗散地震能量，从而在大地震期间造成实质性破坏。在大多数情况下，结构是不可修复的，造成重大的经济损失。重建工作在经济和环境方面也是昂贵和耗时的。拟议的研究将通过开发创新的施工技术来解决这一关键需求，这些技术使用垂直后张预制构件和连接细节，以及旧结构的新型改造技术。此外，超弹性形状记忆合金（SMA）的形式，钢筋，绞线和电缆将被用于沿着与普通钢材开发自定心装置，可以帮助结构恢复到其垂直位置后，地震。该研究计划与创新系统，技术和流程，创业精神以及可持续发展的全球需求保持一致。该研究计划将提供极好的机会，培养由UBC多元化团队组成的多名高素质人员，他们将构成加拿大下一代的高科技工程劳动力。