Development of aerodynamic database via CFD and wind tunnel testing: Application for the performance based wind design of high-rise wood-based buildings

加拿大主要城市的城市集约化程度不断提高，促使建筑师、业主、保险公司和市政当局增加使用更高的木质建筑。加拿大木材理事会最近进行的一项关于建筑物生命周期评估的研究建议，在当前的城市肌理中增加木质建筑，以提高其可持续性，减少其碳足迹。因此，新的加拿大国家建筑规范将木结构建筑的高度限制从四层提高到六层。然而，最近世界各地的项目表明，使用“大量木材”超越了基于规范的高度限制，并使高层木结构建筑成为现实，在技术上成为可能。为了使这一倡议对设计师来说切实可行和合理，需要一个健壮的设计指导方针。木质结构面临的预期挑战之一 它们的重量很轻，这可能会使它们容易受到强风的影响。此外，木质结构体系非常复杂，需要进行详细的风性能分析。解决这些挑战的重要步骤之一是为选定的建筑形状生成详细的风荷载。这些风荷载最好在时间和空间分布上非常详细，以便能够对这些新的木质结构进行复杂的动态分析。为此，本项目将通过基于计算流体力学的计算机模型和基于风洞的实验来建立空气动力学数据库。木材是最可持续的低碳足迹材料之一，它的广泛使用将直接为加拿大的绿色经济做出贡献，从而使加拿大实现限制碳足迹的目标。

The ever increasing urban intensification in major Canadian cities is driving architects, owners, insurers, and municipalities to increase the use of taller wood-based buildings. A recent study conducted by the Canadian Wood Council on the life cycle assessment of buildings suggested to increase wood buildings in the current urban texture to improve its sustainability and reduce its carbon foot print. Therefore, the new National Building Code of Canada increased the height limit on wood frame buildings from four to six stories. However, recent projects around the world showed the use of "mass-timber" to exceed the code based height limitations, and makes tall timber buildings reality and technically possible. To make this initiative practical and rational for designers, a robust design guideline is needed. One of the anticipated challenge for wood-based structures is their light weight and that may make them vulnerable to strong wind. In addition wood-based structural systems are complex and require detail wind performance analysis. One of the important step towards addressing these challenges is the generation of detailed wind loads for selected building shapes. These wind loads preferably should be very detailed in their temporal and spatial distribution to enable complex dynamic analysis of these new wood-based structures. To this end, this project will produce aerodynamic data-base via computational fluid dynamics based computer models and wind tunnel based experiments. Timber is one of the most sustainable material with a low carbon foot print, its wider use will directly contribute to the green economy of Canada, thus enabling Canada achieve its goal of limiting the carbon foot print.