scholarly journals Effect of Shear Walls on the Active Vibration Control of Buildings

Buildings ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 164 ◽  
Author(s):  
Mohamed El Ouni ◽  
Mohamed Laissy ◽  
Mohammed Ismaeil ◽  
Nabil Ben Kahla
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Tall Buildings ◽  
Shear Walls ◽  
Displacement Sensor ◽  
Active Mass ◽  
Mass Damper ◽  
Active Mass Damper ◽  
Active Vibration ◽  
The Impact

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.

scholarly journals Control Methods for Active Mass Damper Using Linear Motor for Vibration Control of Tall Buildings.

1998 ◽  
Vol 64 (620) ◽  
pp. 1154-1161 ◽  
Author(s):  
Takafumi FUJITA ◽  
Tomohiko BESSHO ◽  
Hirokazu HORA ◽  
Kiyoshi TANAKA ◽  
Yoshiya NAKAMURA
Keyword(s):  
Vibration Control ◽  
Tall Buildings ◽  
Linear Motor ◽  
Control Methods ◽  
Active Mass ◽  
Mass Damper ◽  
Active Mass Damper

Active Vibration Control of a Triple Flexible Structures Combined With Actuators

1995 ◽  
Author(s):  
Kazuto Seto ◽  
Yoshihiro Toba ◽  
Fumio Doi
Keyword(s):  
Vibration Control ◽  
Large Scale ◽  
Active Vibration Control ◽  
Flexible Structures ◽  
Low Frequency ◽  
Tall Buildings ◽  
Control Force ◽  
Active Vibration ◽  
Strong Winds ◽  
Lq Control

Abstract In order to realize living comfort of tall buildings by reducing the vibration of higher floors by strong winds, this paper proposes a new method of vibration control for flexible structures with a large scale. The higher a tall building the lower its natural frequency. Since obtaining sufficient force to control the lower frequency vibrations of tall buildings is a difficult task, controlling the vibration of ultra-tall buildings using active dynamic absorbers is nearly impossible. This problem can be overcome by placing actuators between a pair of two or three ultra-tall buildings and using the vibrational force of each building to offset the vibrational movement of its paired mate. Therefore, it is able to obtain enough control force under the low frequency when the proposed method is used. In this paper, a reduced-order model expressed by 2DOF system under taking into consideration for preventing spillover instability is applied to control each flexible structure. The LQ control theory is applied to the design of such a control system. The effectiveness of this method is demonstrated theoretically as well as experimentally.

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