Performance and Optimization of Timber Assemblies Subjected to Near-Field Dynamic Loads

受近场动态载荷影响的木材组件的性能和优化

• 批准号: RGPIN-2022-04942
• 负责人: Viau, Christian
• 金额: $ 1.97万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749120
• 关键词: Performance; Optimization; Timber; Assemblies; Subjected

Developments in design provisions, improvements in engineered wood products, along with the need for sustainable structures have led to a shift in the public's perspective regarding the use of wood in construction. Wood is no longer limited to low-rise construction, and is now used by engineers for mid- and high-rise construction. Due to their lightweight and modular nature, wood structures can be quickly built on-site, making their application appealing as temporary military shelters, and disaster relief stemming from natural and anthropogenic events. Published studies by the applicant have impacted blast-related design code requirements and provisions; however, more research is needed to understand the behaviour of timber structures under hazardous loading events. The overarching objective of this research program is to understand and mitigate hazards associated with impacts, near-field and contact blast loads, and ballistics, referred to as near-field dynamic loads, on timber structures. This objective will be achieved through experimental and computational studies by developing innovative and effective strengthening techniques for easily deployable modular timber structures. The research program will generate new insights into effective force protection design of timber structures and will form the foundation of research training of multiple HQP. The focus of the research program will be on establishing the behaviour and design provisions of timber members and connections, both in isolation and within assemblies, under near-field dynamic loads. The analytical component of the proposed research program will include the development of material-predictive and dynamic analysis models. The models will be used for parametric studies of timber structures subjected to near-field dynamic loads, and damage predictions under these conditions. This research will support the growth of Canada's construction and forestry sectors, which account for 10% of Canada's GDP. An increase in use of timber from sustainably managed forests will aid in the reduction of CO2 emissions from the construction sector, which currently accounts for 39% of global carbon emissions. The research program will significantly contribute to the field of force protection design of timber structures. Specifically, the results from the research will aid in the development and refinement of new and existing design provisions for near-field dynamic loads. Quantification of the dynamic effects and establishing the localized and system-level failure modes will contribute to significant developments in the field. Developed and validated modelling tools will allow designers to properly assess the structural vulnerabilities of timber structures without the need for costly full-scale experimentations. Furthering the knowledge on the behaviour of timber structures under extreme loads will improve public safety whilst developing experienced professionals for the Canadian workforce.

设计条款的发展，工程木制品的改进，以及对可持续结构的需要，导致公众对建筑中使用木材的看法发生了转变。木材不再局限于低层建筑，现在工程师们正在为中高层建筑使用木材。由于其轻便和模块化的性质，木结构可以在现场快速建造，使其作为临时军事避难所和自然和人为事件的救灾应用具有吸引力。申请人发表的研究已经影响了与爆炸相关的设计规范要求和规定；然而，还需要更多的研究来了解木结构在危险加载事件下的行为。该研究计划的总体目标是了解和减轻与木结构上的撞击、近场和接触爆炸载荷以及弹道学(称为近场动态载荷)相关的危险。这一目标将通过实验和计算研究来实现，方法是开发易于部署的模块化木结构的创新和有效的加固技术。该研究项目将对木结构的有效受力保护设计产生新的见解，并将为多个HQP的研究性培训奠定基础。研究计划的重点将是建立近场动态载荷下木构件和连接的行为和设计规定，无论是在隔离状态下还是在组件内。拟议研究方案的分析部分将包括开发材料预测和动态分析模型。该模型将用于木结构在近场动力荷载作用下的参数研究，以及在这些条件下的损伤预测。这项研究将支持加拿大建筑业和林业部门的增长，这两个部门占加拿大GDP的10%。增加使用来自可持续管理森林的木材将有助于减少建筑业的二氧化碳排放，目前建筑业的二氧化碳排放量占全球碳排放量的39%。该研究成果对木结构的受力保护设计具有重要的指导意义。具体地说，研究结果将有助于开发和完善新的和现有的近场动态负载设计规定。动态影响的量化和建立局部和系统级的故障模式将有助于该领域的重大发展。开发和验证的建模工具将使设计者能够适当地评估木结构的结构脆弱性，而不需要进行昂贵的全面试验。进一步了解木结构在极端荷载下的行为将提高公共安全，同时为加拿大劳动力培养经验丰富的专业人员。