Vibration Control of a Gym Floor Using Tuned Mass Dampers: A Numerical Analysis

• 作者: Daniel Valen?a Fiuza Lima Graciela Nora Doz de Carvalho Jorge Eliécer Campuzano Carmona Marcos Daniel Souza dos Santos Suzana Moreira Avila
• 来源期刊: 现代机械工程(英文)
• 学科: 医学
• 关键词: STRUCTURAL Dynamics STRUCTURAL Control Concrete SLABS Tuned MASS DAMPER
• 年，卷（期）: 2013,（3）
• 页码范围: 9-16
• 页数: 8页
• 分类号: R73

摘要

This work presents a study on excessive vibration problem occurring on concrete slabs, usually used on residential and commercial building floors. Even well designed slabs, according to ultimate and serviceability limit states criteria, can be vulnerable to undesirable vibrations that lead to user discomfort. A gym floor, that presented real excessive vibrations, located in a commercial building situated in the city of Brasilia,Brazil, was analyzed via Finite Element Method using ANSYS software. The first step in this analysis was to obtain natural frequencies and vibration modes, the structure presented low natural frequencies representing its flexible behavior. Then it was simulated a dynamic loading of people jumping, characteristic of this type of building occupation. Since it was observed the occurrence of excessive vibrations also in the numerical analysis, a Tuned Mass Damper (TMD) control system was proposed, looking for the best set of dampers to improve the control performance. The parameters for the best vibration reduction were obtained via a parametric study considering four different slabs varying dimensions and support conditions. Different models considering one and more TMDs, varying its placements and parameters, besides the frequency reference value to tune the damper were considered. An efficient control solution to this practical problem is presented to reduce its undesirable vibrations.