2017_-_Oliva_Barone_Lo_Iacono_Navarra_-_AIMETA_2017.pdf (468.26 kB)
Simplified design of nonlinear energy sinks for MDOF structures excited by white noise base excitations
conference contribution
posted on 2017-09-26, 09:04 authored by Maria Oliva, Giorgio Barone, Francesco Lo Iacono, Giacomo NavarraPassive control devices are often used to protect slender and flexible structures from
dynamic actions, including earthquakes, wind and waves. The Nonlinear Energy Sink (NES)
has recently received increasing attention from researchers because of its capability to passively and irreversibly absorb a significant amount of energy from the primary system over a wide range of frequencies. In this paper, the application of two NESs acting in orthogonal directions is considered to mitigate the response of a multi degree of freedom structure. Parameters for each NES are obtained by considering a single degree of freedom structure, whose mass and
frequency are designed based on the fundamental mode of the original structure along the direction of action of the device, and applying the empirical expressions proposed in Oliva et al. (2017). Compared to standard Monte Carlo simulations, the use of these expressions requires a significant lower computational effort, making their implementation suitable for practical
engineering purposes. A numerical application on a three-dimensional building is presented
to demonstrate the effectiveness of the proposed method. The NESs performance is analysed varying the direction of the ground motion, showing the potential of this passive control system in civil engineering applications. Results are reported in terms of statistics of the structural response, determined by Monte Carlo simulation, and analysis of the energy dissipated by the control devices.
History
School
- Architecture, Building and Civil Engineering
Published in
AIMETA 2017Citation
OLIVA, M. ...et al., 2017. Simplified design of nonlinear energy sinks for MDOF structures excited by white noise base excitations. IN: Ascione, L. ...et al. (eds.) AIMETA 2017 : Proceedings of the XXIII Conference of the Italian Association of Theoretical and Applied Mechanics, Salerno, Italy, 4th-7th September, Vol 5, pp. 2372-2384.Publisher
GECHI EDIZIONI by Centro Servizi d’Ateneo S.r.l.Version
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2017Notes
This paper is in closed access until it is published.ISBN
9788894248470Publisher version
Language
- en