A novel framework for multi-hazard performance-based design of sustainable and resilient tall timber and hybrid buildings

一种基于多灾害性能的可持续和弹性高层木结构和混合建筑设计的新颖框架

• 批准号: RGPIN-2019-05584
• 负责人: Tesfamariam, Solomon
• 金额: $ 3.13万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=715607
• 关键词: novel; framework; multi; hazard; performance

Rapid growth of urban populations and associated environmental concerns are challenging city planners and developers to consider sustainable building systems. Timber is a sustainable material, but the 2015 National Building Code Canada (NBCC) limits height of stick frame construction to 6 storeys. With recent introduction of large-scale engineered cross-laminated timber (CLT) panels and glulam timber, mid- and high-rise timber buildings became viable option. A decision on the selection of tall building by different stakeholders should consider economics, aesthetics, technology, regulations and political factors. The political factors are indeed satisfied as the Canadian timber industry and Natural Resources Canada are backing design and construction of tall-timber buildings. With this initiative, an 18-storey UBC's Brock common (the tallest hybrid wood building in the world in 2017, at 18 storeys) and 13-sotrey Origine (the tallest all-wood condominium building in North America in 2017, at 13 storeys) buildings are constructed in Vancouver and Quebec City, respectively. Current seismic design guideline of the NBCC, however, is not suited for tall-timber buildings. In addition, tall-timber buildings are lighter and more flexible, making such buildings vulnerable to wind. The state-of-the-art global building codes and standards consider wind and earthquake design loads separately with the worst case governing the design. In a city like Vancouver, for example, both wind and seismic loads can compete and govern the design. Risk-based design and optimization, can be used as a unifying procedure for wind and earthquake hazard to meet different performance objectives (e.g. serviceability/comfort, life safety). The long-term program of the proposed research is to develop a performance-based design (PBD) frameworks for innovative tall-timber buildings under multi-hazard consideration (earthquake, wind, fire). The design framework will incorporate minimization of risk and cost, formulated as a multiobjective optimization problem. To achieve the long-term program, the short-term objectives are: A) develop a multi-hazard (earthquake and wind) PBD framework; B) develop innovative tall-timber buildings incorporating energy dissipators; C) extend the state-of-the-art on energy-based design and incorporated soil structure interaction (SSI); and D) apply advanced multi-objective structural design optimization algorithms. This research will have a significant impact on Canadian society and the engineering community. The outcome of this program is develop a new framework for multi-hazard performance-based design tall timber buildings to improve the sustainability and resiliency of cities. The applicant has been working in the area of timber-based hybrid structures, seismic risk and performance-based wind engineering.

城市人口和相关环境问题的快速增长是城市规划人员和开发商考虑可持续建筑系统的挑战。木材是一种可持续的材料，但2015年的加拿大国家建筑法规（NBCC）将棒框架建设的高度限制为6层。随着大型工程跨层压木材（CLT）和Glulam Timber的最近引入，中高层木材建筑成为可行的选择。关于不同利益相关者选择高建筑物的决定，应考虑经济学，美学，技术，法规和政治因素。由于加拿大加拿大加拿大的自然资源正在支持高音木板建筑的设计和建设，因此政治因素确实得到了满足。有了这一倡议，一座18层的UBC的Brock Common（2017年世界上最高的混合木建筑，18层）和13 sotrey Origine（2017年北美最高的全木公寓建筑，13层，位于13层）建筑物是在温哥华和Quebec City建造的。 但是，NBCC的当前地震设计指南不适合高高的建筑物。此外，高木建筑物更轻，更灵活，使这种建筑物容易受到风的影响。最先进的全球建筑法规和标准考虑了风与地震设计，而最坏的情况是设计。例如，在温哥华这样的城市中，风和地震负荷都可以竞争并控制设计。基于风险的设计和优化可以用作风和地震危害的统一程序，以满足不同的性能目标（例如，可维修/舒适性，生命安全）。拟议研究的长期计划是在多危险考虑（地震，风能，火灾）下为创新高架建筑开发基于性能的设计（PBD）框架。该设计框架将结合风险和成本的最低限制，该风险和成本被认为是一个多目标优化问题。为了实现长期计划，短期目标是： a）开发多危险（地震和风）PBD框架； b）开发富含能量耗散器的创新高架建筑； c）扩展了基于能量的设计和结合土壤结构相互作用（SSI）的最先进；和 d）应用高级多目标结构设计优化算法。 这项研究将对加拿大社会和工程界产生重大影响。该计划的结果是开发一个新的框架，用于基于多危险性能的设计高木材建筑，以提高城市的可持续性和弹性。申请人一直在基于木材的混合结构，地震风险和基于性能的风力工程领域工作。