Geology Reference
In-Depth Information
Chapter 4
Optimal Passive Damper
Positioning Techniques:
State-of-the-Art
Arun M. Puthanpurayil
University of Canterbury, New Zealand
Rajesh P Dhakal
University of Canterbury, New Zealand
Athol J. Carr
University of Canterbury, New Zealand
ABSTRACT
A consolidated review of the current-state-of-the-art on optimal damper positioning techniques is presented
in this chapter. The inherent assumptions made in previous research are discussed and substantiated
with numerical studies. Earlier studies have shown that optimal distribution of dampers is sensitive to
in-structure damping. In this chapter the significance of optimal distribution of dampers coupled with
the necessity for the use of a more realistic in-structure damping model is qualitatively illustrated using
a comparative sensitivity study. The effect of inherent assumption of linearity of the parent frame on the
'optimality' is also investigated. It is shown that linearity assumption imposed on the parent frame in a
major seismic event may not be justified; thereby raising doubts on the scope of optimality techniques
proposed in literature.
INTRODUCTION
mainly enriched by mechanical and aerospace
engineering and its adoption in structural engi-
neering is rather more recent. The introduction of
control techniques in structural engineering was
mainly necessitated due to the growing demand
for minimizing damage during a seismic event.
The effectiveness of control strategies in achieving
the objectives of performance based design is well
accepted in structural engineering community. The
theory of structural control as a field in itself was
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