Development of High-Performance Structural Steel Systems for Resilient and Sustainable Buildings

开发用于弹性和可持续建筑的高性能钢结构系统

• 批准号: RGPIN-2019-05605
• 负责人: Moradi, Saber
• 金额: $ 1.89万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=681445
• 关键词: Development; Performance; Structural; Steel; Systems

Experience with past earthquakes has shown that buildings are susceptible to structural damage. Economic losses associated with the repair, downtime, and demolition of buildings have significant consequences on the community functionality especially in urban regions. A recent report by the Insurance Bureau of Canada highlighted that British Columbia could experience economic losses as high as $75 billion under an earthquake of the magnitude expected for the West Coast. In view of potential socio-economic impacts, it is critical to develop new seismic force resisting systems that can protect built infrastructure from damage and disruption. ***The proposed research program enhances the resilience and sustainability of civil engineering infrastructure by developing new structural systems that can minimize structural damage and reduce earthquake losses and downtime. One promising approach is the application of Shape Memory Alloys (SMAs) as seismic damping and recentering elements. SMAs exhibit several unique characteristics, such as self-centering (the ability to return to their original position after experiencing large deformations). Despite promising results and a growing interest over the last 2 decades in using SMAs for seismic design and retrofit of structures, the practical applications of SMAs remain at an early stage. This is due to challenges, such as material cost, limitations in analysis tools, and lack of design guidelines and comprehensive assessments of the life-cycle benefits of using SMAs. This research program addresses the challenges with the practical application of SMAs in steel moment frames. Over the next 5 years, comprehensive research will be performed, including both numerical and experimental studies that span component-level modeling and testing to building-level performance-based design and assessment. The specific objectives are to: (1) develop and experimentally validate predictive models, design and assessment tools that can be used in practice; (2) systematically characterize and optimize the seismic response; and (3) quantify the benefits of using SMAs in steel buildings through comparative life-cycle seismic performance assessment.***The long-term objective of this research program is to facilitate the practical applications of seismic damage-avoidance systems. The developed design guidelines for SMA-based steel frames from this research will be recommended for implementation into the Canadian design standard for steel structures (CSA-S16) and the National Building Code of Canada. While the focus of this proposed research is on new steel buildings, research findings will be useful for both new construction and seismic retrofit of deficient framed structures. The research program will benefit the broader society by training highly qualified personnel as well as developing building systems with resilient and sustainable features that exceed the minimum performance level found in the current Canadian design standards.

过去地震的经验表明，建筑物容易受到结构损害。与建筑物的维修，停机时间和拆除相关的经济损失对社区功能尤其是在城市地区产生重大影响。加拿大保险局最近的一份报告强调，不列颠哥伦比亚省的经济损失可能会在西海岸预期的地震下高达750亿美元。鉴于潜在的社会经济影响，至关重要的是，开发可以保护建筑基础设施免受破坏和破坏的新型地震力系统至关重要。 ***拟议的研究计划通过开发新的结构系统来最大程度地减少结构性破坏并减少地震损失和停机时间，从而增强了土木工程基础设施的韧性和可持续性。一种有希望的方法是形状记忆合金（SMA）作为地震阻尼和最近的元素的应用。 SMA表现出几种独特的特征，例如自我核心（经历大变形后能够恢复其原始位置的能力）。尽管在过去的20年中，人们对使用SMA进行地震设计和结构改造的有希望的结果和日益增长的兴趣，但SMA的实际应用仍在早期。这是由于挑战，例如材料成本，分析工具的限制以及缺乏设计指南以及对使用SMA的生命周期收益的全面评估。该研究计划解决了SMA在钢矩框架中实际应用的挑战。在接下来的5年中，将进行全面的研究，包括跨越组件级建模和测试的数值和实验研究，以进行基于建筑级的绩效设计和评估。具体目标是：（1）开发和实验验证可以在实践中使用的预测模型，设计和评估工具； （2）系统地表征和优化地震反应； （3）通过比较生命周期的地震绩效评估来量化在钢结构中使用SMA的好处。***该研究计划的长期目标是促进避免地震损伤系统的实际应用。该研究的基于SMA的钢框架的开发设计指南将建议使用加拿大钢结构设计标准（CSA-S16）和《加拿大国家建筑法典》。虽然这项拟议的研究的重点是新的钢结构，但研究结果对于不足的框架结构的新建筑和地震改造都是有用的。该研究计划将通过培训高素质的人员以及开发具有弹性和可持续性功能的建筑系统来使更广泛的社会受益，这些建筑系统超过了当前加拿大设计标准中最低绩效水平。