Review of approaches, opportunities, and future directions for improving aerodynamics of tall buildings with smart facades
Review of approaches, opportunities, and future directions for improving aerodynamics of tall buildings with smart facades
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DOI：
10.1016/j.scs.2021.102979
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发表时间：
2021-05
影响因子：
11.7
通讯作者：
M. Jafari;A. Alipour
中科院分区：
文献类型：
--
作者：
M. Jafari;A. Alipour
在过去的几十年里，由于文化、经济和技术方面的原因，对高层建筑的需求不断增加。这种细长的结构更灵活，更容易受到风引起的振动的影响。此外，风速随高度呈指数增长，导致较高水平和复杂湍流状态的风载荷较大。这种影响要求采用更创新的方法来增强高层建筑的弹性，同时考虑到可持续性影响。目前使用辅助阻尼器控制振动的方法通常受其适用带宽的限制。空气动力学的修改是针对特定的风向和特征，不能适应气候的变化或流动状况，因为新建筑靠近目标建筑。在世界各地，通过通风和节能应用，在使用二级建筑以实现可持续性方面取得了重大进展。这些进步导致了建筑和能源应用的适应性外墙的发展。这篇综述文章讨论了利用现有的自适应farade系统功能（用于能源应用）来改变建筑空气动力学的可用方法和潜在机会。为此，本文简要地讨论了空气动力学修改、表面粗糙度效应、可用的生物启发方法和潜在的变形材料能力，为理解此类系统的流动控制机制提供了有价值的见解，可能导致farade系统的创新设计。将这一概念与智能技术相结合，开发具有空气动力学性能的智能建筑，从而减轻高层建筑中的风致振动。对这一主题的现有研究进行回顾，为加强外墙作为主动、动态和智能系统的使用提供了机会，不仅可以提高高层建筑在风致振动下的性能，还可以实现长期节能，从而形成更具弹性和可持续发展的社区。
The demand for tall buildings has increased over the past decades for cultural, financial, and technological reasons. Such slender structures are more flexible and vulnerable to wind-induced vibrations. Additionally, wind speed exponentially increases with height, resulting in larger wind loading on higher levels and complex turbulent regimes. Such effects call for more innovative approaches to enhance the resilience of tall buildings while accounting for the sustainability implications. Current methodologies to control the vibrations using auxiliary dampers are typically limited in their applicable bandwidth. The aerodynamic modifications are specific to a particular wind direction and characteristics and cannot adapt to the changing climate or that of flow regimes due to the new construction in the proximity of the target building. There have been major advances in using secondary façades to achieve sustainability through ventilation and energy-saving applications around the world. These advances have resulted in the development of adaptive facades for architectural and energy applications. This review paper discusses the available approaches and potential opportunities to utilize the existing adaptive façade system capabilities (for energy applications) to alter building aerodynamics. For this purpose, the paper concisely discusses aerodynamic modification, surface roughness effects, available bio-inspired approaches, and potential morphing material capabilities to provide valuable insights into understanding the flow-control mechanism of such systems, potentially leading to innovative designs of façade systems. Opportunities have been identified to combine this concept with smart technologies to develop smart façades with the aerodynamic performance that leads to mitigating wind-induced vibration in tall buildings. The review of existing research on this topic opens up opportunities for enhancing the use of facades as active, dynamic, and smart systems that not only enhance the performance of the tall buildings under wind-induced vibrations but also can result in long term energy saving, leading to more resilient and sustainable communities.