Causal Clipped Semi-Active Control of Earthquake Response
Publication: Structures Congress 2009: Don't Mess with Structural Engineers: Expanding Our Role
Abstract
The truly optimal semi-active control establishes the best possible performance of a dynamically excited and semi-actively controlled structure. While it can not be implemented in practice, it provides a performance goal for implementable control schemes. This paper proposes an implementable clipped semi-active control to suppress the earthquake response. The proposed method uses the minimax approach to modify the control parameter. The performance of a single degree of freedom (sdof) structure is investigated for the proposed control and compared to those of the optimal passive damping, the truly optimal control and the uncontrolled case. The results obtained illustrate that the proposed control outperforms the optimal passive damping control and the semi-active damping modified by the proposed control has a potential to adapt to the characteristics of the earthquake ground motion. It is also concluded that the semi-active damping has ability to follow the truly optimal trajectories more closely with improved control methods.
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Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Continuum mechanics
- Damping
- Degrees of freedom
- Displacement (mechanics)
- Dynamics (solid mechanics)
- Earthquake engineering
- Earthquake resistant structures
- Earthquakes
- Engineering fundamentals
- Engineering mechanics
- Geohazards
- Geotechnical engineering
- Geotechnical investigation
- Ground motion
- Mathematics
- Parameters (statistics)
- Solid mechanics
- Statistics
- Structural control
- Structural dynamics
- Structural engineering
- Structural health monitoring
- Structural mechanics
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