Semiactive Control Using MR Dampers of a Frame Structure under Seismic Excitation

Journal Article · Tue Jul 08 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2963781· OSTI ID:21148927

Gattulli, Vincenzo; Lepidi, Marco; Potenza, Francesco ^[1]; Carneiro, Rubia ^[2]

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1. DISAT, University of L'Aquila, Monteluco di Roio (Italy)
2. ENC, University of Brasilia (Brazil)

The paper approaches the multifaceted task of semiactively controlling the seismic response of a prototypal building model, through interstorey bracings embedding magnetorheological dampers. The control strategy is based on a synthetic discrete model, purposely formulated in a reduced space of significant dynamic variables, and consistently updated to match the modal properties identified from the experimental response of the modeled physical structure. The occurrence of a known eccentricity in the mass distribution, breaking the structural symmetry, is also considered. The dissipative action of two magnetorheological dampers is governed by a clipped-optimal control strategy. The dampers are positioned in order to deliver two eccentric and independent forces, acting on the first-storey displacements. This set-up allows the mitigation of the three-dimensional motion arising when monodirectional ground motion is imposed on the non-symmetric structure. Numerical investigations on the model response to natural accelerograms are presented. The effectiveness of the control strategy is discussed through synthetic performance indexes.

• OSTI ID: 21148927
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1020; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
BUILDINGS
COEFFICIENT OF PERFORMANCE
DAMPING
EXCITATION
GROUND MOTION
MASS DISTRIBUTION
OPTIMAL CONTROL
SEISMOLOGY