A hybrid mass damper system controlled by H control theory for reducing bending–torsion vibration of an actual building

Abstract

SUMMARYA pair of hybrid mass dampers has been installed on an actual 23-storey building located in Tokyo. The aim of the dampers is to counteract wind and smaller earthquake excited oscillations. H ∞ control theory has been applied to control the dampers for reducing both bending and torsion vibrations simultaneously. For the design of the controller, identiÿcation parameters resulting from the forced vibration test of the building are adopted. The target of the controller performance is to reduce the vibration of ÿrst mode and to keep robust stabilization over the second or higher mode. From the results of forced vibration tests conducted after installation of the controller, it was conÿrmed that this system has proven control e ect, largely satisfying what was aimed for in the design. Furthermore, system performance has been continually recorded during earthquakes, and analysis of the data has proved control e ect.

Technical Note: Active and Semi-Active Strategies to Control Building Structures Under Large Earthquake Motion

“…Implementations of semi-active variable damping systems on buildings, based on the information available in the reports from [Ikeda, 2009;Kurata and Kobori, 2003;Kurino et al, 2010;Shimizu et al, 2004;Takahashi et al, 1998] 3, 5, 7-9, 12-13, 21-24, 32, 34, 43, and 51-53, were based on the information available at [Fujinami et al, 2001;Fujita, 1994;Kitamura et al, 1992;Lin Zhou et al, 2012;Lu and Jiang, 2011;Maebayashi et al, 1992;Miyashita et al, 1998;Nagashima et al, 2001;Nakamura et al, 2001;Nishimura et al, 1998;Park et al, 2006;Saito et al, 2001;Shiba et al, 1998;Shimizu et al, 2004;Watakabe et al, 2001;…”

Advances in bidirectional modeling and structural control

“…It is suitable for multiple input multiple output (MIMO) structural control systems. [20] analyzes a 23-storey building in Tokyo using a pair of hybrid mass dampers. Bidirectional seismic excitations is considered.…”

Time delayH∞control of structures under earthquake loading

“…A nonconvex optimization problem was formulated and solved using an iterative solution method to obtain the desired control gains. More recently, H ∞ control theory has also been applied to an actual building in Tokyo, Japan using a pair of mass dampers to reduce the bending-torsion motions due to earthquakes (Fujinami et al, 2001).…”