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

设计规定的发展，工程木制品的改进，沿着对可持续结构的需求，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，现在被工程师用于中高层建筑。由于其重量轻和模块化的性质，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引起的灾难救济的应用具有吸引力。申请人发表的研究影响了与爆破有关的设计规范要求和规定;然而，需要进行更多的研究，以了解木结构在危险荷载事件下的行为。该研究计划的总体目标是了解和减轻与木结构上的冲击，近场和接触爆炸载荷以及弹道学（称为近场动态载荷）相关的危害。这一目标将通过实验和计算研究，通过开发创新和有效的加强技术，易于部署的模块化木结构来实现。该研究计划将为木结构的有效力保护设计提供新的见解，并将为多名HQP的研究培训奠定基础。研究计划的重点将是建立行为和木构件和连接的设计规定，无论是在隔离和组件内，近场动态载荷。拟议研究计划的分析部分将包括材料预测和动态分析模型的开发。该模型将用于近场动态载荷下木结构的参数研究，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和林业部门的增长，这些部门占加拿大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量，目前建筑业占全球碳排放量的39%。该研究计划将大大有助于木结构的力保护设计领域。具体而言，研究结果将有助于开发和完善新的和现有的近场动态载荷的设计规定。量化的动态效应，并建立本地化和系统级的故障模式将有助于显着的发展领域。开发和验证的建模工具将使设计人员能够正确评估木结构的结构脆弱性，而不需要昂贵的全面实验。进一步了解木结构在极端荷载下的行为将改善公共安全，同时为加拿大劳动力培养有经验的专业人员。

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.