Title

A High Efficiency Control Logic for Semi-Active Friction Dampers

Abstract

The dynamic behaviors of piezoelectric friction dampers are studied in this paper. The friction dampers utilize their sliding mode to accommodate large deformations in civil engineering structures and use piezoelectric actuators to regulate their clamped force. An efficient control logic is proposed to determine the friction force for increased energy dissipation capacity. It combines the hysteretic and viscous damping mechanisms. The damper is first used to mitigate the dynamic responses of a single-story frame structure subjected to harmonic loads. Analytical results obtained in this case have shown the superiority of the proposed algorithm over others in terms of structural response reduction and energy dissipation. Such friction dampers are then placed on a 20-story benchmark structure for control of seismic responses. The simulation results show that the proposed control strategy is very efficient in reducing peak responses under earthquake excitations.

Meeting Name

Structures Congress and Exposition, Structures (2001: May 21-23, Washington, DC)

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Damping; Earthquakes; Seismic Response; Analytical Results; Benchmark Structure; Civil Engineering Structures; Control Strategies; Dynamic Behaviors; Earthquake Excitation; Efficient Control; Energy Dissipation Capacities; Frame Structure; Friction Damper; Friction Force; Harmonic Loads; High Efficiency Control; Large Deformations; Peak Response; Piezoelectric Friction Damper; Semi-Active; Simulation Result; Sliding Modes; Structural Response; Viscous Damping; Algorithms; Civil Engineering

International Standard Book Number (ISBN)

0784405581; 9780784405581

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 American Society of Civil Engineers (ASCE), All rights reserved.

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