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Proceedings Paper

Semiactive control of a steel frame with piezoelectric friction dampers
Author(s): Genda Chen; Chaoqiang Chen
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Paper Abstract

In this paper, a previously designed and fabricated friction damper with four piezoelectric actuators was installed on the first story of a ¼ scale, 3-story steel structure. The performance of the damper and a simple control strategy was evaluated both numerically and experimentally under four modified earthquake ground motion records of various amplitudes. The seismic effectiveness and adaptability of the algorithm as well as the effect of damper saturation on structural responses were investigated. Numerical simulations of the structure agreed well with the experimental results. The proposed control strategy can not only effectively reduce the structural responses but also adapt to the varying excitations from both weak and strong earthquakes. Experimental results also indicated that a piezoelectric friction damper slightly saturated could be advantageous to the seismic mitigation of buildings. Over saturation will, however, degrade the performance of the semi-active control strategy.

Paper Details

Date Published: 18 August 2003
PDF: 11 pages
Proc. SPIE 5057, Smart Structures and Materials 2003: Smart Systems and Nondestructive Evaluation for Civil Infrastructures, (18 August 2003); doi: 10.1117/12.482688
Show Author Affiliations
Genda Chen, Univ. of Missouri-Rolla (United States)
Chaoqiang Chen, Univ. of Missouri-Rolla (United States)


Published in SPIE Proceedings Vol. 5057:
Smart Structures and Materials 2003: Smart Systems and Nondestructive Evaluation for Civil Infrastructures
Shih-Chi Liu, Editor(s)

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