DBPapers
DOI: 10.5593/SGEM2014/B11/S5.058

CONTROL STRATEGIES FOR SEISMIC ENERGY DISSIPATION

S. G. Luca, C. Pastia, I. O .Toma, M. Budescu
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-07-0 / ISSN 1314-2704, June 19-25, 2014, Book 1, Vol. 1, 435-442 pp

ABSTRACT
This paper presents design criteria of passive, semi-active or active control strategies taking into account the energy characteristics for the whole system (control mechanism and structure) subjected to seismic action (NS component recorded at El Centro). If passive control systems are used for enhancing the structural damping or stiffness, the other control techniques employ controllable forces to add or to dissipate energy in a structure due to the specific devices integrated with sensors, controllers and real-time processes to operate. The numerical analyses of the shear-type model of a single-degree-of freedom (SDOF) structure have been carried out to mitigate the energy dissipation demand for the primary structural elements in the following four cases: 1) the non-linear behavior of the primary structural system; 2) a passive hysteretic damper attached at the primary structural system; 3) an active system that applied control forces on the structural mass; 4) a semi-active fluid damper attached at the primary structural system. Design decisions in order to choose a right control strategy regarding the reduction of energy requirement and the decreasing of the displacement response for a SDOF structure will be discussed.

Keywords:damping, energy concept, energy dissipation, ductility, seismic action.