Civil Engineering Reference
In-Depth Information
Semi-active systems are a subset of active systems, but need less external energy
than active systems. Examples of these systems include semi-active impact dampers,
adjustable tuned liquid dampers and controllable fluid dampers.
Hybrid systems are systems where active and passive systems, or semi-active and
passive systems, are combined. Hybrid mass dampers (HMDs) are an example of this
kind of system.
Floor 92
Floor 87
Figure 6.20
The use of a tuned mass damper in the Taipei 101
Floor movement
Lateral load
Liquid flow
No floor movement
Lateral load
Floor movement
Liquid flow
Figure 6.21
The use of a tuned liquid damper in the Millennium Tower (Kareem et al.,
1999)
