Enhancing the Seismic Resilience of Canada's Built Environment through Comprehensive Risk-Based Assessments of New and Existing Tall Buildings

通过对新建和现有高层建筑进行基于风险的综合评估，增强加拿大建筑环境的抗震能力

• 批准号: RGPIN-2019-04599
• 负责人: MolinaHutt, Carlos
• 金额: $ 2.26万
• 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: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=737728
• 关键词: Enhancing; Seismic; Resilience; Canada; Built

Studies on the impacts of likely earthquake scenarios in the Canadian West and East Coasts suggest that direct financial losses can exceed $70 billion and $60 billion, respectively. These losses, primarily due to seismic damage to buildings and infrastructure, highlight the need for our built environment to be more resilient to earthquakes. One of the primary objectives of building codes is to provide acceptable safety in extreme earthquakes. However, significant building damage is considered acceptable as long as the life-safety objective is met. As a result, both existing and newly designed buildings are susceptible to damage from strong earthquakes, which could result in extensive downtime and potential need for demolition and reconstruction. This research program aims to enhance the seismic resilience of Canada's built environment by improving our understanding of the seismic risks posed by new and existing tall buildings, which play a key role in our socio-economic activity and their resilience is vital to ensuring effective post-earthquake recovery of our cities. While many cities in Canada recognize their seismic vulnerability, programs to improve their resilience are often challenged by a lack of understanding of the expected seismic performance of their building stock or the costs associated with adopting different strategies. This research program aims to enable seismic policy decision-making with explicit consideration of the societal and economic impacts of the performance of the built environment during major earthquakes. The long-term objectives are to develop new methodological approaches to assess seismic risk in buildings and their implications on urban resilience. These will be achieved by focusing on short-term structural engineering aspects related to tall buildings, which are required to develop earthquake disaster resilience: (1) advance the quality and accuracy of urban risk models by developing tools and data specific to the tall building stock in Canada; (2) quantify costs and benefits of performance-based seismic design of future tall buildings; and (3) develop seismic resilience indicators to advise design decisions related to future buildings, promoting more resilient construction. The results from Objective 1 will serve to evaluate different retrofit interventions in seismically vulnerable existing tall buildings to cost-effectively mitigate their risk; results which will be distilled to inform seismic policy. Objectives 2 and 3 will highlight whether the implicit life-safety objective of building codes is sufficient to ensure the seismic resilience of cities and will inform discussions by the Standing Committee on Earthquake Design of the National Building Code of Canada related to enhanced seismic performance objectives and performance-based design requirements for future construction. This program will also provide state-of-the-art training to future members of Canada's earthquake engineering community.

对加拿大西海岸和东海岸可能发生的地震影响的研究表明，直接经济损失可能分别超过 700 亿美元和 600 亿美元。这些损失主要是由于地震对建筑物和基础设施造成的破坏，凸显了我们的建筑环境需要更具抗震能力。建筑规范的主要目标之一是在极端地震中提供可接受的安全性。然而，只要满足生命安全目标，重大建筑物损坏就被认为是可以接受的。因此，现有的和新建的建筑都容易受到强烈地震的破坏，这可能会导致长时间的停工，并可能需要拆除和重建。该研究计划旨在通过提高我们对新建和现有高层建筑所带来的地震风险的了解来增强加拿大建筑环境的抗震能力，这些建筑在我们的社会经济活动中发挥着关键作用，其抗震能力对于确保有效的后期重建至关重要。我们城市的地震恢复。 尽管加拿大的许多城市认识到其地震脆弱性，但提高其抗震能力的计划往往因缺乏对其建筑群的预期抗震性能或与采用不同策略相关的成本的了解而受到挑战。该研究计划旨在使地震政策决策能够明确考虑大地震期间建筑环境性能的社会和经济影响。长期目标是开发新的方法来评估建筑物的地震风险及其对城市复原力的影响。这些目标将通过关注与高层建筑相关的短期结构工程方面来实现，这是发展抗震能力所必需的：（1）通过开发针对高层建筑群的工具和数据来提高城市风险模型的质量和准确性在加拿大； (2) 量化未来高层建筑基于性能的抗震设计的成本和效益； (3) 制定抗震指标，为与未来建筑相关的设计决策提供建议，促进更具弹性的建筑。 目标 1 的结果将用于评估现有高层建筑中易受地震影响的不同改造干预措施，以经济有效地降低其风险；结果将被提炼出来，为地震政策提供信息。目标 2 和 3 将强调建筑规范隐含的生命安全目标是否足以确保城市的抗震能力，并将为加拿大国家建筑规范地震设计常设委员会有关增强抗震性能目标和未来施工的基于性能的设计要求。该计划还将为加拿大地震工程界的未来成员提供最先进的培训。