Innovative Hybrid Bracing Systems for Enhancing Infrastructure Resilience

相当数量的市政基础设施状况堪忧。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至10年里，修复或更换这些资产是必不可少的，以确保其提供的服务继续满足社会的期望。更大比例的市政基础设施被认为状况良好，需要在中期和长期内予以注意和执行程序。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，必须立即采取措施，开发创新的、低成本的、可靠的建筑和改造方案来解决目前的状况。除了建筑设计、使用、年龄和建筑材料固有的风险外，还有许多情况下，地震以外的危险因素可能使建筑物处于危险之中，从技术故障到恶劣天气。强风、冻雨和大雪载荷以及其他环境条件可能对现有结构施加压力。虽然这些事件中的大多数可能不会导致倒塌，但这些极端事件可能超过建筑规范中在可服务性方面定义的阈值。它们可能导致功能丧失以及非结构性损伤。拟议的研究计划旨在通过结构系统的创新和知识向实践的转移来减少整体脆弱性。提出的研究将开发创新的混合侧向力抵抗系统。超弹性形状记忆合金（SMA）将与常规增强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直立位置。此外，还将使用其他智能材料，如摩擦弹簧（FS）和聚氨酯。通过在这些混合器件中使用两种或两种以上的材料来开发不同的组合，以获得更好的性能。将在不同的载荷条件下进行构件试验。在实验测试和结果的基础上，进一步完善数值模型，并进行广泛的动态模拟。调查响应修正因素，进行脆弱性评估。这项研究将有助于加拿大满足对智能结构的需求，并在此类结构及其组件的开发方面培养高素质的人才。这将为基础设施行业提供固有的可持续性和吸收极端负荷事件后果的能力。这项研究的意义是至关重要的，因为它确保了对各种不同程度的危害的安全性和安全性的提高，并将引导加拿大为基础设施及其管理提供可持续的解决方案。

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.