Background

Façade technologies are in continuous evolution and the idea to realize buildings equipped with cladding systems capable to undergo significant displacements relatively to the main structure has been considered by many authors as an opportunity to improve their vibration performances.

Method

From a structural dynamics viewpoint, a building with a monolithic Moving Façade is essentially the same thing as a building with a Tuned Mass Damper. However, in the presence of excitations directly acting on the external surface of the building, there may be significant diferences of behavior. In this work, a first step towards a systematic comparison between the performances of buildings with Moving Façades and Tuned Mass Dampers is carried out in the simplest setting of 2 degrees of freedom modeling and harmonic excitation.

Results

Despite the deceptive simplicity of the setting, some of the aspects related to the potential applicability of moving façades to vibration damping and the correlated limitations are discussed and critically analyzed. The analyses show that, depending on the tuning of the system, monolithic Moving Façades could effectively act as vibration absorbers with a potentially high efficiency. However, it turns out that good performances could be realized at the price of extremely large displacements of the façade. The possibility to pursue potential applications of this type of systems seems therefore to be subordinated to the search of solutions to limit such displacements within functionally acceptable ranges.

中文翻译：

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谐波激励下带有活动立面的建筑物的减振性能

背景

幕墙技术正在不断发展，许多作者认为实现装备有能够相对于主要结构发生较大位移的覆层系统的建筑物的想法是改善其振动性能的机会。

方法

从结构动力学的角度来看，带有整体移动立面的建筑物与带有调谐质量阻尼器的建筑物本质上是相同的。但是，在存在直接作用于建筑物外表面的激励的情况下，行为可能会有很大差异。在这项工作中，第一步是在2自由度建模和谐波激励的最简单设置下，进行具有移动立面和调谐质量阻尼器的建筑性能之间的系统比较。

结果

尽管设置看起来简单，但仍讨论并严格分析了与将立面移动到振动阻尼上的潜在适用性以及相关限制有关的某些方面。分析表明，根据系统的调整，整体式移动外立面可以有效地充当振动吸收器，并具有潜在的高效率。然而，事实证明，以立面的巨大位移为代价可以实现良好的性能。因此，寻求这种类型系统潜在应用的可能性似乎服从于寻找解决方案以将这种位移限制在功能上可接受的范围内。