Tall building vibration control using a TM‐MR damper assembly: Experimental results and implementation

Zemp, René; Llera, Juan Carlos de la; Roschke, Paul N.

doi:10.1002/eqe.1021

Cited by 12 publications

(23 citation statements)

References 8 publications

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“…As case study, the design of a TMDI for a 21-story existing reinforced concrete (RC) building located in Santiago, Chile is considered [46]. The building has tapered elliptical shape, length 76.…”

Section: Application To a Real-life Case Study Structurementioning

confidence: 99%

Risk-informed optimization of the tuned mass-damper-inerter (TMDI) for the seismic protection of multi-storey building structures

Ruiz

Taflanidis

Giaralis

et al. 2018

Engineering Structures

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Section: Application To a Real-life Case Study Structurementioning

confidence: 99%

Risk-informed optimization of the tuned mass-damper-inerter (TMDI) for the seismic protection of multi-storey building structures

Ruiz

Taflanidis

Giaralis

et al. 2018

Engineering Structures

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“…The two sets of building periods are used herein to bound building response values. Ambient vibration tests also led to an identified damping ratio for the structure s [11] ranging between 0.8 and 1.7%. The building model (Figure 2(a)) considers an approximate representation of the structure by 20 Ritz-vectors, while the TMs are modeled considering two-horizontal displacements for each mass as degrees of freedom (DOFS).…”

Section: Building and Structural Modelmentioning

confidence: 99%

“…Consequently, it is assumed herein that the objective damper force ranging between F MR,min and F MR,max can be tracked without such delay. As it is shown elsewhere [11], for hybrid simulation tests it will become necessary to keep this time delay as small as possible in order to reach good control of the TM, which requires a relatively high voltage source of approximately 120 V DC.…”

Section: Building and Structural Modelmentioning

confidence: 99%

Tall building vibration control using a TM‐MR damper assembly

Zemp

Llera

Almazán

2010

Earthq Engng Struct Dyn

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This research investigates the seismic and harmonic response of a true free-plan tall building equipped with two tuned pendular inertial masses (TMs) and magnetorheological (MR) dampers. Construction of this proof-of-concept building was completed in 2007, and it is the first of its class in Chile. This article provides research results associated with this specific implementation; however, in order to make the results applicable to other building cases a parametric study was considered. A brief description of the structure and TM implementation together with the nonlinear equations of motion of the TM-MR damper assembly are presented. Building displacements and accelerations are computed and analyzed for a suite of subduction-type and near field ground motions. Besides, a new physical controller for the MR dampers is proposed and analyzed. The performance of this controller is compared with that of benchmark LQR controllers. In general, the TM-MR damper assembly improves the lateral performance of this structure for lateral harmonic excitations. However, the expected peak and RMS response modification factors and efficacy of the solution for earthquake excitations are strongly dependent on the frequency content of the excitation.damper to semiactively control a tuned mass, and the evaluation of the true performance of such solution for the free-plan building concept.It is well known that the efficacy of a TM depends on the frequency content of the excitation and the dynamic properties of the structure. There is general consensus that tuned masses are effective in reducing the response due to harmonic excitations [1] and wind excitations [2]. However, for seismic actions, there is no general agreement. For instance, some authors conclude that a TM combined with an optimal viscous damper is not effective in reducing the response due to earthquake excitations [3,4]. On the other hand, several analytical studies have shown that by connecting a TM to a semi-active MR device in structures subjected to earthquake and harmonic excitation, it is possible to improve the building performance [5][6][7][8][9]. In either case, questions such as the tuning frequency for a pendulum under large deformations, the optimal selection of damping in such case, and the effectiveness of a semiactive device versus a passive device, are not obvious decisions in this application.MR-dampers are semi-active MR fluid devices with a very low power requirement where a magnetic flux changes the fluid from a free-flowing linear viscous fluid state to a semi-solid state with controllable yield strength [10]. Due to this property, the reactive force applied on the TM by the MR-damper can be dynamically controlled within a range. The first full-scale application of an MR-damper was done in 2001, when two 30-ton MR-dampers were installed at the Tokyo National Museum of Emerging Science and Innovation. Additionally, different types of control strategies for a TM using MR-dampers have been investigated in the literature [6][7][8][9].This article invest...

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“…As shown in [29][30][31][32]37], current reversal applied during a short time interval and with limited magnitude helps to accelerate demagnetization and consequently improves the FT accuracy.…”

Section: Constrained Current Reversal By Feedbackmentioning

confidence: 99%

“…In [29][30][31][32]37], the time interval and magnitude are constant parameters obtained by trial and error. For the present control system, the current reversal is generated by the feedback whereby both magnitude and time interval are adjusted in proportion with the actual FTE.…”

Section: Constrained Current Reversal By Feedbackmentioning

confidence: 99%

Robust force tracking control scheme for MR dampers

Weber

2015

Struct. Control Health Monit.

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SUMMARYThis paper describes a novel force tracking control scheme for magnetorheological (MR) dampers. The feed forward, which is derived by a control-oriented mapping approach to reduce modelling effort of the inverse MR damper behaviour, compensates for the main steady-state nonlinearity of the MR damper force and thereby linearizes the plant. The resulting force tracking error due to model imperfections and parameter uncertainties is reduced by parallel proportional and integral feedback gains that are formulated based on the absolute values of actual MR damper force and desired control force due to the semi-active constraint of the MR damper force. The feedback is enriched by an anti-reset windup to account for MR damper current constraints and the concept of current reversal to accelerate demagnetization. The experimental validations of the force tracking control scheme on a rotational and a long-stroke MR damper demonstrate its robustness and efficacy.

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Tall building vibration control using a TM‐MR damper assembly: Experimental results and implementation

Cited by 12 publications

References 8 publications

Risk-informed optimization of the tuned mass-damper-inerter (TMDI) for the seismic protection of multi-storey building structures

Risk-informed optimization of the tuned mass-damper-inerter (TMDI) for the seismic protection of multi-storey building structures

Tall building vibration control using a TM‐MR damper assembly

Robust force tracking control scheme for MR dampers

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