09-21-2009, 07:35 AM
Passive and Active Structural Vibration Control in Civil Engineering
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In structural engineering, one of the constant challenges is to find new and better means
of designing new structures or strengthening existing ones so that they, together with
their occupants and contents, can be better protected from the damaging effects of
destructive environmental forces such as wind, wave loads, and earthquakes. As a result,
new and innovative concepts of structural protection have been advanced and are at
various stages of development. Structural protective systems can be divided into three
groups as shown in Table I. The technique of seismic isolation is now widely used in
many parts of the world. A seismic isolation system is typically placed at the foundation
of a structure which, by means of its flexibility and energy absorption capability, partially
absorbs and partially reflects some of the earthquake input energy before it is transmitted
to the structure. The net effect is a reduction of energy dissipation demand on the
structural system, resulting in an increase in its survivability.
This collection of lecture notes represents an attempt to introduce the basic concepts
of these relatively new technologies, to provide a working knowledge of this exciting and
fast expanding field, and to bring up-to-date current research and world-wide
development in seismic isolation, pussive energy dissipation, and active control. The
book is divided into three parts, each addressing one of these topics. In each case, basic
principles are introduced, followed by design and applications, implementation issues,
case studies, and code issues if applicable.
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