Tuned Mass Dampers (TMDs) are aimed at mitigating vibrations of a structure under seismic or wind excitation by tuning the characteristics of the device to control specific resonance frequencies of the structure. However, the vibration modes of a structure can be considerably altered by the interaction with soil, leading to a loss of efficiency of the device. This paper shows the preliminary results of a study aimed at formulating a methodology for the design of TMDs accounting for soil-structure interaction. Taking as a reference an illustrative case study of a timber building equipped with a TMD, the results of a parametric study on the effects of soil-structure interaction are presented. This is accomplished through finite element simulations in which soil-structure interaction is described by dynamic impedance functions, in order to have computationally efficient models to study the properties of the soil-structure system. The results are expressed in terms of non-dimensional performance curves of the TMD accounting for soil-structure interaction. The performance curve describes the progressive decay of the TMD efficiency as a function of the structure-to-soil relative stiffness, highlighting the main features of the response of the soil-structure system. This also allowed a clear quantification of the relative contributions of soil stiffness and TMD to the attenuation of the structural displacements.
Effect of soil-structure interaction on seismic performance of tuned mass dampers in buildings / Gorini, DAVIDE NOE'; Chisari, Corrado. - (2019), pp. 2690-2697. [10.1201/9780429031274].
Effect of soil-structure interaction on seismic performance of tuned mass dampers in buildings
Davide Noè Gorini
Primo
;Corrado ChisariSecondo
2019
Abstract
Tuned Mass Dampers (TMDs) are aimed at mitigating vibrations of a structure under seismic or wind excitation by tuning the characteristics of the device to control specific resonance frequencies of the structure. However, the vibration modes of a structure can be considerably altered by the interaction with soil, leading to a loss of efficiency of the device. This paper shows the preliminary results of a study aimed at formulating a methodology for the design of TMDs accounting for soil-structure interaction. Taking as a reference an illustrative case study of a timber building equipped with a TMD, the results of a parametric study on the effects of soil-structure interaction are presented. This is accomplished through finite element simulations in which soil-structure interaction is described by dynamic impedance functions, in order to have computationally efficient models to study the properties of the soil-structure system. The results are expressed in terms of non-dimensional performance curves of the TMD accounting for soil-structure interaction. The performance curve describes the progressive decay of the TMD efficiency as a function of the structure-to-soil relative stiffness, highlighting the main features of the response of the soil-structure system. This also allowed a clear quantification of the relative contributions of soil stiffness and TMD to the attenuation of the structural displacements.File | Dimensione | Formato | |
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Note: https://www.crcpress.com/Earthquake-Geotechnical-Engineering-for-Protection-and-Development-of-Environment/Silvestri-Moraci/p/book/9780429031274
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