Fundamental Study of Active Mass Damper Using Multistage Rubber Bearing and Hydraulic Actuator for Vibration Control of Tall Buildings. 2nd Report, Excitation Tests for Experimental Model of Building with Mass Damper.

The study aims to assess the impact of shear walls on active vibration control of the buildings. It has evaluated the design of a smart 20-story building equipped with an Active Mass Damper to mitigate earthquakes. The design has combined shear walls with an Active Mass Damper (AMD) added on the top floor. The control configuration used a force actuator combined with a displacement sensor and was examined with Direct Velocity Feedback. The effect of the presence of wall braces in the design of tall buildings on the performances as well as the control effort has been studied. The results have stated that the shear walls designed for mitigating earthquake loads are capable of reducing the displacement of the tall building somewhat but failed to reduce the acceleration of the top floor. The combination between shear walls and AMD has incredible damping capability on the displacement and acceleration of the building. However, the shear walls tend to increase the control cost since they require more control energy.

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Implementation of Hybrid Mass Damper with Convertible Active and Passive Modes Using Multistage Rubber Bearing and Hydraulic Actuator for Vibration Control of Tall Buildings.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.60.4107 ◽

1994 ◽

Vol 60 (580) ◽

pp. 4107-4115 ◽

Cited By ~ 1

Author(s):

Takafumi Fujita ◽

Takayoshi Kamada ◽

Takayuki Teramoto ◽

Haruyuki Kitamura ◽

Yoji Suizu ◽

...

Keyword(s):

Vibration Control ◽

Tall Buildings ◽

Hydraulic Actuator ◽

Rubber Bearing ◽

Mass Damper

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Transverse Vibration Control for Cable Stayed Bridge Under Construction Using Active Mass Damper

Advances on Analysis and Control of Vibrations - Theory and Applications ◽

10.5772/45794 ◽

2012 ◽

Author(s):

Hao Chen ◽

Zhi Sun ◽

Limin Su

Keyword(s):

Vibration Control ◽

Transverse Vibration ◽

Active Mass ◽

Cable Stayed Bridge ◽

Mass Damper ◽

Active Mass Damper ◽

Under Construction

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Fundamental Study of Active Mass Damper for Improving Livability of Houses Against Traffic Vibration: Substantiation Test

Seismic Engineering, Volume 1 ◽

10.1115/pvp2004-2936 ◽

2004 ◽

Author(s):

Osamu Hasegawa ◽

Jyunji Okabe ◽

Toyohiko Higashida ◽

Yukito Matsumoto

Keyword(s):

Complex Geometry ◽

Vibration Level ◽

Fundamental Study ◽

Active Mass ◽

Target Weight ◽

Response Characteristics ◽

Close Proximity ◽

Mass Damper ◽

Active Mass Damper ◽

External Forces

In Japan, there are many houses built in limited space as well as in close proximity to causeways and railroads, due mainly to concentration of population in the cities in recent years. Slender structures and especially 3-story houses are susceptible to vibration induced by external forces such as traffic. This effect often creates an uncomfortable environment for habitation. Because houses often have a complex geometry, it is difficult to establish the vibration characteristics of a structure. Furthermore, the response characteristics of a house will change with environmental conditions. A prototype Active Mass Damper (AMD) has been developed to address some of these issues. This has been tested in an exhibition house in Tokyo. It uses two AMD’s of 1,725N mass each for both X-axis and Y-axis. Both AMD’s are applied in X and Y directions and are installed at RooF level, they are controlled by Direct Displacement Feedback (DDFB). The test showed that the AMD could dramatically reduce vibration. Of particular note was reduction about 6dB to 8dB (L10) in the first mode of vibration even though the house mass is double the prototype target weight. Also, vibration was dramatically decreased by the AMD on 3rd floor of the house. Vibration level and comfort are important criteria for this kind of system.

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