Eventos Anais de eventos
MecSol 2017
6th International Symposium on Solid Mechanics
OPTIMUM DESIGN OF MULTIPLE FRICTION TUNED MASS DAMPERS UNDER SEISMIC EXCITATIONS
Submission Author:
Giancarlo Mantovani , SC
Co-Authors:
Leandro Fadel Miguel, Rafael Holdor Lopez, Letícia Miguel, André Torii
Presenter: Giancarlo Mantovani
doi://10.26678/ABCM.MecSol2017.MSL17-0024
Abstract
External passive energy dissipation systems have been widely used in order to reduce vibrations in structures subjected to seismic excitations. Within this context, the performance of passive tuned mass dampers in vibration mitigation due to earthquakes is the study object of many researchers. This paper presents a study on global optimization of multiple friction tuned mass dampers (MFTMDs) to control vibrations in structures subjected to seismic excitations. Computational codes for calculating the dynamic response of structures with MFTMDs are elaborated considering nonlinear analysis in the time domain. For the optimization scheme, because of the nonconvex nature of the problem, a hybrid algorithm composed of the algorithms Firefly (FA) and Nelder-Mead (NMA) is applied. The seismic excitations are treated as a stationary stochastic process. Real seismic records are also considered. A numerical example on a ten story shear building with one, two and five dampers is demonstrated. The quantity and positioning of the MFTMDs in the structure are previously fixed. Results show that the use of multiple dampers is more efficient than the use of only one and the proposed approach demonstrates to be a suitable alternative to furnish the optimum MFTMDs parameters in structures subjected to seismic excitations.
Keywords
seismic excitations, Optimization, MFTMDs, nonlinear analysis
