Semi-Active Vibration Control of a 3-DOF Scaled Frame with a Magneto-Rheological Damper

• Type: Article in International Conference Proceedings Book
• Date: 2010

Authors

M.B. Cesar (Author) Other; R.C. Barros (Author) FEUP

Conference proceedings International

Title: Proceedings of The Tenth International Conference on Computational Structures Technology

The Tenth International Conference on Computational Structures Technology

Valencia-Spain, 14 a 17 de Setembro de 2010

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ISI Proceedings

ISI Web of Science

Scopus

COMPENDEX

Scientific classification

FOS: Engineering and technology > Civil engineering

Other information

Resumo (PT): In the last two decades R&D of structural vibration control devices for buildings and bridges has been intensified to reply to construction market needs that demand more effective systems to decrease the damage caused by seismic and wind loading. This is the result of a public necessity to guarantee the serviceability of construction lifelines throughout and after the occurrence of a moderate or severe seismic event (Barros et al. [1]). In this paper is addressed some on-going R&D on the vibration control of a 3-DOF scaled metallic frame with a magneto-rheological (MR) damper (Barros et al. [2], Cesar and Barros [3]). The 3-DOF frame was subjected to system identification techniques using an impact hammer procedure, to obtain the experimental dynamic properties of this structural system. A laboratory tested MR damper was then assembled in the scaled frame and new identification procedures were carried out to verify the influence of this device in the frame dynamic behavior. Based on these results a numerical model was created simulating semi-active control, in order to investigate and calibrate the frame behavior with the MR damper. The Bouc-Wen model (Dyke et al. [4]) was used for the MR damper that allows modeling nonlinear hysteretic systems. To study the response of the model structure with the semi-active controller, a few characteristic earthquake records were considered and some Matlab/Simulink routines were developed. Herein El Centro earthquake record was selected as input for the Lyapunov based controller, and El Centro and Kobe-NIS earthquake records for the Clipped-Optimal control algorithm. The simulated results show that the control algorithms, based on Lyapunov stability theory and Clipped-Optimal control, resulted in an improvement over the uncontrolled system. (Paper 169)

Abstract (EN): In the last two decades R&D of structural vibration control devices for buildings and bridges has been intensified to reply to construction market needs that demand more effective systems to decrease the damage caused by seismic and wind loading. This is the result of a public necessity to guarantee the serviceability of construction lifelines throughout and after the occurrence of a moderate or severe seismic event (Barros et al. [1]). In this paper is addressed some on-going R&D on the vibration control of a 3-DOF scaled metallic frame with a magneto-rheological (MR) damper (Barros et al. [2], Cesar and Barros [3]). The 3-DOF frame was subjected to system identification techniques using an impact hammer procedure, to obtain the experimental dynamic properties of this structural system. A laboratory tested MR damper was then assembled in the scaled frame and new identification procedures were carried out to verify the influence of this device in the frame dynamic behavior. Based on these results a numerical model was created simulating semi-active control, in order to investigate and calibrate the frame behavior with the MR damper. The Bouc-Wen model (Dyke et al. [4]) was used for the MR damper that allows modeling nonlinear hysteretic systems. To study the response of the model structure with the semi-active controller, a few characteristic earthquake records were considered and some Matlab/Simulink routines were developed. Herein El Centro earthquake record was selected as input for the Lyapunov based controller, and El Centro and Kobe-NIS earthquake records for the Clipped-Optimal control algorithm. The simulated results show that the control algorithms, based on Lyapunov stability theory and Clipped-Optimal control, resulted in an improvement over the uncontrolled system. (Paper 169)

Language: English

Type (Professor's evaluation): Scientific