Critical mode control of a wind-loaded tall building using an active tuned mass damper

This study investigates the vibration reduction of tall wind-excited buildings using a tuned mass damper (TMD) with an inerter (TMDI). The performance of the TMDI is computed as a function of the floor to which the inerter is grounded as this parameter strongly influences the vibration reduction of the building and for the case when the inerter is grounded to the earth whereby the absolute acceleration of the corresponding inerter terminal is zero. Simulations are made for broadband and harmonic excitations of the first three bending modes, and the conventional TMD is used as a benchmark. It is found that the inerter performs best when grounded to the earth because, then, the inerter force is in proportion to the absolute acceleration of only the pendulum mass, but not to the relative acceleration of the two inerter terminals, which is demonstrated by the mass matrix. However, if the inerter is grounded to a floor below the pendulum mass, the TMDI only outperforms the TMD if the inerter is grounded to a floor within approximately the first third of the building’s height. For the most realistic case, where the inerter is grounded to a floor in the vicinity of the pendulum mass, the TMDI performs far worse than the classical TMD.

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Influence of soil-structure interaction on performance of a super tall building using a new eddy-current tuned mass damper

The Structural Design of Tall and Special Buildings ◽

10.1002/tal.1501 ◽

2018 ◽

Vol 27 (14) ◽

pp. e1501 ◽

Cited By ~ 4

Author(s):

Zhiguang Zhou ◽

Xiaodong Wei ◽

Zheng Lu ◽

Boris Jeremic

Keyword(s):

Eddy Current ◽

Soil Structure ◽

Tuned Mass Damper ◽

Tall Building ◽

Soil Structure Interaction ◽

Structure Interaction ◽

Mass Damper

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LQG Control of Along-Wind Response of a Tall Building with an ATMD

Mathematical Problems in Engineering ◽

10.1155/2014/206786 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 2

Author(s):

Ki-Pyo You ◽

Jang-Youl You ◽

Young-Moon Kim

Keyword(s):

Damping Ratio ◽

Tall Buildings ◽

Tuned Mass Damper ◽

Wind Load ◽

Tall Building ◽

Structural Safety ◽

Design Parameters ◽

Random Load ◽

Mass Damper ◽

Wind Response

Modern tall buildings use lighter construction materials that have high strength and less stiffness and are more flexible. Although this results in the improvement of structural safety, excessive wind-induced excitations could lead to occupant discomfort. The optimal control law of a linear quadratic Gaussian (LQG) controller with an active tuned mass damper (ATMD) is used for reducing the along-wind response of a tall building. ATMD consists of a second mass with optimum parameters for tuning frequency and damping ratio of the tuned mass damper (TMD), under the stationary random load, was used. A fluctuating along-wind load, acting on a tall building, was treated as a stationary Gaussian white noise and was simulated numerically, in the time domain, using the along-wind load spectra proposed by G. Solari in 1993. Using this simulated wind load, it was possible to calculate the along-wind responses of a tall building (with and without the ATMD), using an LQG controller. Comparing the RMS (root mean square) response revealed that the numerically simulated along-wind responses, without ATMD, are a good approximation to the closed form response, and that the reduced responses with ATMD and LQG controller were estimated by varying the values of control design parameters.

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