High-Performance Structural Systems for Seismic Protection and Resilience of Built Infrastructure

北美的基础设施正在老化，许多结构急需维修或更换。加拿大市政联合会目前估计，基础设施赤字——为加拿大老化的基础设施进行必要的维修和更换所需的资金——超过1000亿美元。许多这些结构是由钢筋混凝土（RC）建造的，并且是在引入现代地震设计标准（20世纪70年代或80年代之前）之前设计的，使它们容易受到地震危害。无论有缺陷的结构是要修复还是更换，工程师都需要高性能的设计解决方案，以减轻地震危害并提高弹性。在新建筑中，有对钢铁和混凝土的可持续替代品的需求，以减少建筑业对环境的影响，据估计，建筑业产生的温室气体排放量高达全球温室气体排放量的7%。为了解决这些问题，该发现基金的研究将集中在用于抗震保护和建筑基础设施弹性的高性能结构系统上，具体针对两个研究主题：(1)使用外部粘结碳纤维增强聚合物（CFRP）板材进行旧RC剪力墙结构的地震评估和修复；(2)用于新结构的高性能重型木钢结构组合系统。为期5年的互补项目将解决加拿大现有建筑中旧RC剪力墙建筑抗震性能方面的知识空白，研究以前未考虑过的新型CFRP结构，并为创新的钢管锚系统制定第一个综合设计指南。对于新的（即替代）结构，研究开发创新的重型木钢结构系统将解决加拿大和国外对可持续和有弹性的木结构日益增长的需求。通过结合新颖的实验，强大的计算机模型和先进传感器的创新应用，该研究计划将支持开创性的贡献观察，解释和量化这些结构系统的系统级地震行为。从这项研究中收集的知识和数据将对加拿大公众产生长期影响，有助于制定新的设计指南和结构系统，以最大限度地减少地震脆弱性，减少对环境的影响，并提高恢复力。该研究计划将培养10名HQP（2名博士，3名硕士和5名本科），具有结构和地震工程方面的先进知识和技能，以满足这些领域对专家的大量需求。本研究项目的毕业生有望被积极招聘为工程专业人员。培训将强调批判性思维、解决问题的能力、项目管理、强大的沟通技巧以及合作研究的重要性，包括公平、多样性和包容性。

North American infrastructure is aging and many structures are in dire need of repair or replacement. The Federation of Canadian Municipalities currently estimates that the infrastructure deficit - the money required to fund necessary repairs to and replacements of Canada's aging infrastructure - is more than $100 billion. Many of these structures are constructed of reinforced concrete (RC) and were designed before the introduction of modern seismic design standards (pre-1970s or 80s), leaving them vulnerable to seismic hazards. Whether a deficient structure is going to be repaired or replaced, engineers need high-performance design solutions that mitigate seismic hazards and promote resilience. In new construction, there is a demand for sustainable alternatives to steel and concrete to reduce the environmental impact of the construction industry, which is estimated to produce as much as 7% of global greenhouse gas emissions. To address these concerns, investigations over the course of this Discovery grant will focus on high-performance structural systems for seismic protection and resilience of built infrastructure, specifically targeting two research themes: (1) seismic assessment and rehabilitation of old RC shear wall structures using externally bonded carbon fibre-reinforced polymer (CFRP) sheets and (2) high-performance combined heavy timber-steel structural systems for new structures. Complementary projects over 5 years will address knowledge gaps around the seismic performance of old RC shear wall buildings in Canada's existing building stock, study novel CFRP configurations not previously considered and produce the first comprehensive design guidelines for an innovative steel tube anchor system. For new (i.e. replacement) structures, research into the development of innovative heavy timber-steel structural systems will address the growing demand for sustainable and resilient timber structures in Canada and abroad. By combining novel experiments, robust computer models and innovative applications of advanced sensors, this research program will support seminal contributions observing, explaining and quantifying the system-level seismic behaviour of these structural systems. The knowledge and data collected from this research will impact the Canadian public over the long term, contributing to new design guidelines and structural systems that will minimize seismic vulnerabilities, reduce environmental impacts and promote resilience. This research program will train 10 HQP (2 PhD, 3 MASc and 5 UG) with advanced knowledge and skills in structural and earthquake engineering to address the substantial demand for experts in these fields. Graduates of this research program are expected to be actively recruited as engineering professionals. Training will emphasize critical thinking, problem solving, project management, strong communication skills and the importance of collaborative research that embraces equity, diversity and inclusion.