Publications / 2008 Proceedings of the 25th ISARC, Vilnius, Lituania

Seismic Responses of Civil Structures under Magnetorheological-Device Direct Control

M. T. Nguyen, H. Dalvand, Ying-Hao Yu, Q. P. Ha
Pages 106-112 (2008 Proceedings of the 25th ISARC, Vilnius, Lituania, ISBN 978-9955-28-304-1, ISSN 2413-5844)
Abstract:

This paper presents an efficient control strategy for magnetorheological (MR) dampers embedded in building structures to mitigate quake-induced vibrations. In this work, MR dampers are used as semi-active devices, taking the advantages of the fail-safe operation and low power requirement. By using a static hysteresis model for the MR damper, a suitable controller is proposed here for direct control of the supply currents of the MR dampers using feedback linearization. The dampers are configured in a differential mode to counteract the force-offset problem from the use of a single damper. The effectiveness of the proposed technique is verified in simulation by using a ten-storey building model subject to quake-like excitations.

Keywords: Structural control, MR dampers, semi-active control, seismic response