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

北美的基础设施正在老化，许多建筑亟需维修或更换。加拿大市政当局联合会目前估计，基础设施赤字--资助加拿大老化基础设施的必要维修和更换所需资金--超过1000亿美元。其中许多结构是用钢筋混凝土(RC)建造的，是在引入现代抗震设计标准(1970年代或80年代之前)之前设计的，这使得它们容易受到地震危险的影响。 无论是要修复还是替换有缺陷的结构，工程师都需要高性能的设计解决方案，以减轻地震危险并提高弹性。在新的建筑中，人们对钢铁和混凝土的可持续替代品有需求，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，Discovery赠款过程中的调查将侧重于用于抗震和已建基础设施恢复的高性能结构系统，特别针对两个研究主题：(1)使用外部粘结的碳纤维增强聚合物(CFRP)片材对旧RC剪力墙结构进行抗震评估和修复；(2)新结构的高性能组合重型木材-钢结构体系。为期5年的补充项目将解决加拿大现有建筑库存中关于旧RC剪力墙建筑抗震性能的知识空白，研究以前未考虑过的新型CFRP配置，并为创新的钢管锚固系统制定第一个全面的设计指南。对于新的(即替代的)结构，研究开发创新的重型木材-钢结构系统将满足加拿大和国外对可持续和有弹性的木材结构日益增长的需求。 通过将新颖的实验、强大的计算机模型和先进传感器的创新应用相结合，该研究计划将为观察、解释和量化这些结构系统的系统级地震行为做出开创性的贡献。这项研究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体系，将地震脆弱性降至最低，减少对环境的影响，并提高复原力。 这项研究计划将培训10名HQP(2名博士，3名硕士和5名UG)，拥有结构和地震工程方面的高级知识和技能，以满足这些领域对专家的大量需求。这一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、项目管理、强大的沟通技能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.