Hybrid CFD-Wind Tunnel Platform for Wind Load Evaluation of Tall Buildings

用于高层建筑风荷载评估的混合 CFD 风洞平台

• 批准号: RGPIN-2019-05569
• 负责人: Aboshosha, Haitham
• 金额: $ 2.26万
• 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: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=738376
• 关键词: Hybrid; CFD; Wind; Tunnel; Platform

Design codes have limitations when it comes to wind load evaluation for tall buildings. For example, the codes (i) consider only basic building shapes, (ii) can't account for local surrounding configuration which can be of a significant effect, and (iii) do not distinguish between synoptic (regular) and non-synoptic (thunderstorm) winds. Wind Tunnel (WT) and Computational Fluid Dynamic (CFD) tools can be used in those cases. WT has gone through a long journey of over five decades of validation and utilization. However, conducting a WT study requires a long lead time (several weeks) for the model construction and instrumentation. CFD can overcome this challenge especially when the parallel computational power is properly utilized. However, because of its relatively newer introduction to wind load evaluation, CFD still needs more validation. This proposal focuses on coupling CFD and WT tools to combine the merits of both in terms of robustness and accuracy to study tall buildings aerodynamics. In this research proposal, three research programs have been introduced to investigate wind load evaluation of tall buildings considering snoptic and non-synoptic (thunderstorm) winds as follows: (i) Develop and validate a High-Performance (HP) CFD code tailored for aerodynamic wind load evaluation on Shared Memory Multi-Processor (SMMP) systems. SMMP systems prove to be 3-4 times faster than systems based on Message Passing Interface (MPI) widely used in current CFD codes; (ii) Develop, calibrate and automate a platform for WT testing at the subsonic WT at Ryerson U, which will be utilized to validate the CFD code in Program i; (iii) Develop and validate an analysis platform to couple the aerodynamic data from CFD/WT with climate and structural dynamic analyses to predict building responses and equivalent static loads. The anticipated CFD/WT platform will be employed to analyze several building shapes and surrounding configurations to cover the gaps in the design codes mentioned above and to develop a simplified analytical wind load evaluation approach suitable for practitioner engineers and/or for adoption in design codes. In addition, the platform enables users from both academia and industry to use the platform through a cyber interface at no cost to obtain their building loads. This will ultimately benefit our society to have buildings more resilient to natural wind-related disasters frequently driven by the climate change, which are two of the priority research areas of the Canadian Government.

在高层建筑的风荷载评估方面，设计规范存在局限性。例如，这些规范（i）仅考虑基本的建筑形状，（ii）无法考虑可能产生重大影响的局部周围配置，以及（iii）不区分天气（常规）和非天气（雷暴）风。在这些情况下可以使用风洞 (WT) 和计算流体动力学 (CFD) 工具。 WT已经经历了五十多年的验证和使用的漫长历程。然而，进行小波变换研究需要很长的准备时间（几周）来构建模型和使用仪器。 CFD 可以克服这一挑战，特别是在正确利用并行计算能力的情况下。然而，由于 CFD 风荷载评估相对较新，因此仍需要更多验证。该提案的重点是结合 CFD 和 WT 工具，结合两者在鲁棒性和准确性方面的优点来研究高层建筑空气动力学。在本研究提案中，引入了三个研究项目来研究考虑天气和非天气（雷暴）风的高层建筑的风荷载评估，如下：（i）开发和验证针对空气动力学量身定制的高性能（HP）CFD代码共享内存多处理器 (SMMP) 系统的风荷载评估。事实证明，SMMP 系统比当前 CFD 代码中广泛使用的基于消息传递接口 (MPI) 的系统快 3-4 倍； (ii) 开发、校准和自动化瑞尔森大学亚音速WT测试平台，该平台将用于验证计划i中的CFD代码； (iii) 开发并验证一个分析平台，将 CFD/WT 的空气动力学数据与气候和结构动态分析相结合，以预测建筑响应和等效静载荷。 预期的 CFD/WT 平台将用于分析多种建筑形状和周围配置，以弥补上述设计规范中的空白，并开发适合从业工程师和/或在设计规范中采用的简化分析风荷载评估方法。此外，该平台使学术界和工业界的用户能够通过网络界面免费使用该平台来获取其建筑负载。这最终将使我们的社会受益，使建筑物能够更有效地抵御由气候变化引起的与风有关的自然灾害，这是加拿大政府的两个优先研究领域。