Innovative Hybrid Bracing Systems for Enhancing Infrastructure Resilience

用于增强基础设施弹性的创新混合支撑系统

• 批准号: RGPIN-2022-04084
• 负责人: Issa, Anas
• 金额: $ 1.75万
• 依托单位: Lakehead University
• 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=749363
• 关键词: Innovative; Hybrid; Bracing; Systems; Enhancing

A concerning volume of municipal infrastructure is in deplorable condition. Thus, infrastructure requires immediate and necessary action, as the rehabilitation or replacement of these assets is essential in the following 5-10 years to ensure that the services it provides continue to meet the community's expectations. An even larger proportion of municipal infrastructure is considered in fair condition, requiring attention and procedures to be implemented in the medium and long term. Infrastructure reports published in Canada and the US reflects the vulnerability of our existing infrastructure. Hence, it is imperative to take immediate measures to develop innovative, low-cost, and reliable construction and retrofitting solutions for addressing the current situation. Apart from the risks inherent to building design, use, age and construction material, there are many instances where hazards other than earthquakes may put buildings at risk, ranging from technical failures to severe weather. High winds, freezing rain and heavy snow loads, and other environmental conditions may impose stresses on existing structures. Although most of these events may not result in a collapse, these extreme events could exceed the threshold defined in the Building Code in terms of serviceability. They may result in the loss of functionality as well as non-structural damages. The proposed research program aims to reduce overall vulnerability through innovations in structural systems and the transfer of knowledge to practice. The proposed research will develop innovative hybrid lateral force resisting systems. Super-elastic Shape Memory Alloy (SMA) will be utilized along with regular reinforcement materials for developing self-centring bracing devices that can help structure bring back to its upright position after lateral loads. In addition, other smart materials will be utilized, such as Friction Springs (FS) and Polyurethane. Different combinations will be developed by employing two or more materials in these hybrid devices to achieve better performance. Component testing will be carried out under different loading conditions. Based on the experimental testing and results, the numerical models will be further refined, and extensive dynamic simulations will be conducted. Response modification factors will be investigated, and vulnerability assessment will be conducted. This research will help Canada to meet the need for smart structures and train high quality personnel on the development of such structures and their components. This will provide the infrastructure industry with inherent sustainability and ability to absorb the consequences of extreme load events. The significance of this research is paramount as it ensures improved safety and security against a variety of hazards of different magnitudes and will lead Canada to a sustainable solution for infrastructure and its management.

大量市政基础设施状况不佳。因此，基础设施需要立即采取必要的行动，因为在接下来的 5-10 年内修复或更换这些资产至关重要，以确保其提供的服务继续满足社区的期望。更大比例的市政基础设施被认为状况良好，需要中长期关注和实施程序。加拿大和美国发布的基础设施报告反映了我们现有基础设施的脆弱性。因此，当务之急是立即采取措施，开发创新、低成本、可靠的建筑和改造解决方案来应对当前的情况。除了建筑设计、使用、年限和建筑材料固有的风险外，在许多情况下，地震以外的灾害也可能使建筑物面临风险，包括技术故障和恶劣天气。大风、冻雨和大雪荷载以及其他环境条件可能会对现有结构施加压力。尽管大多数此类事件可能不会导致倒塌，但这些极端事件可能会超出建筑规范中规定的适用性阈值。它们可能会导致功能丧失以及非结构性损坏。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整体脆弱性。拟议的研究将开发创新的混合横向力抵抗系统。超弹性形状记忆合金（SMA）将与常规加固材料一起用于开发自定心支撑装置，该装置可以帮助结构在侧向载荷后恢复到直立位置。此外，还将使用其他智能材料，例如摩擦弹簧（FS）和聚氨酯。通过在这些混合器件中采用两种或多种材料来开发不同的组合，以实现更好的性能。组件测试将在不同的负载条件下进行。根据实验测试和结果，将进一步完善数值模型，并进行广泛的动态模拟。将调查响应修改因素，并进行脆弱性评估。这项研究将帮助加拿大满足智能结构的需求，并培训开发此类结构及其组件的高素质人才。这将为基础设施行业提供固有的可持续性和吸收极端负载事件后果的能力。这项研究的意义至关重要，因为它确保提高针对不同程度的各种危害的安全性，并将引导加拿大为基础设施及其管理找到可持续的解决方案。