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Seismic Performance of Vibration Control Device That Generates Power

[+] Author Affiliations
Taichi Matsuoka, Katsuaki Sunakoda, Kazuhiko Hiramoto, Issei Yamazaki

Akita University, Akita, Japan

Akira Fukukita

Shimizu Corporation, Tokyo, Japan

Paul N. Roschke

Texas A&M University, College Station, TX

Chin-Hsiung Loh

National Taiwan University, Taipei, Taiwan

Pei-Yang Lin

National Center for Research on Earthquake Engineering, Taipei, Taiwan

Paper No. PVP2009-77695, pp. 255-262; 8 pages
doi:10.1115/PVP2009-77695
From:
  • ASME 2009 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Prague, Czech Republic, July 26–30, 2009
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4371-0 | eISBN: 978-0-7918-3854-9
  • Copyright © 2009 by ASME

abstract

In a previous paper the authors proposed a semi-active vibration control device (VCD) that generates power. The device utilizes a ball screw, and has inertial and damping forces. The damping coefficient is adjusted by altering resistance at the terminal of the power generator. A small-scale VCD was manufactured for experimental testing. Frequency responses of a small-scale spring mass structure were measured in order to confirm the effects of vibration suppression within a wide range of frequencies. In this paper, as the next step, vibration tests using a benchmark structure with an installed VCD that has a 30 kN capacity are carried out at the National Center for Research on Earthquake Engineering (NCREE) in Taiwan. The benchmark structure has three stories with a 3 m height and a mass of 6 tons at each floor level for a total height and weight of 9 m and 18 tons, respectively. The VCDs are installed between adjacent floors with steel chevron braces. A simple control law that is based on a minimized Lyapunov function and employs bang-bang operation is used as a variable current controller instead of the modifying the resistance level of the VCD. Scaled earthquake motions including the Imperial Valley El Centro north-south component that is normalized to be a peak level of 0.5 m/s2 , are applied to the base of the steel framed structure in the horizontal direction by a shaking table. Experimental responses of each floor for the uncontrolled and controlled cases are compared with analytical responses, and effects of vibration suppression for the large-scale model are discussed quantitatively.

Copyright © 2009 by ASME

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