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。加拿大联邦政府目前估计，基础设施赤字-为加拿大老化基础设施的必要维修和更换提供资金所需的资金-超过1000亿美元。这些结构中的许多是由钢筋混凝土（RC）建造的，并且是在现代抗震设计标准引入之前（20世纪70年代或80年代之前）设计的，这使得它们容易受到地震灾害的影响。 无论是修复还是更换有缺陷的结构，工程师都需要高性能的设计解决方案，以减轻地震危害并提高弹性。在新建筑中，需要可持续的钢材和混凝土替代品，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，在这个发现补助金的过程中，调查将集中在高性能结构系统的地震保护和建筑基础设施的弹性，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，以及（2）高性能组合重型木材-新结构的钢结构系统。为期5年的补充项目将解决加拿大现有建筑存量中旧钢筋混凝土剪力墙建筑抗震性能的知识差距，研究以前未考虑过的新型CFRP配置，并为创新钢管锚系统制定第一个全面的设计指南。对于新的（即替换）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弹性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，该研究计划将支持观测，解释和量化这些结构系统的系统级地震行为的开创性贡献。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准则和结构系统，最大限度地减少地震脆弱性，减少环境影响，提高复原力。 该研究计划将培养10名HQP（2名博士，3名硕士和5名UG），他们在结构和地震工程方面具有先进的知识和技能，以满足对这些领域专家的大量需求。该研究计划的毕业生预计将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，强大的沟通技巧和合作研究的重要性，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.