&lt;title&gt;Analytical and numerical study of a smart sliding base isolation system for seismic protection of buildings&lt;/title&gt;

Madden, Glenn J.; Wongprasert, N.; Symans, Michael D.

doi:10.1117/12.383148

Cited by 4 publications

(3 citation statements)

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“…In bolted frames and truss structures, friction can contribute over 90% to the passive damping capacity [1]. In buildings it is exploited against earthquakes [2]. In order to obtain a semi-active system, the friction in the bolts has to be controlled.…”

Section: Introductionmentioning

confidence: 99%

Frictional behaviour of polymer films under mechanical and electrostatic loads

Ginés¹,

Bergamini²,

Christen³

et al. 2013

Smart Mater. Struct.

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Different polymer foils, namely polyimide, FEP, PFA and PVDF were tested on a setup designed to measure the static coefficient of friction between them. The setup was designed according to the requirements of a damping device based on electrostatically tunable friction. The foils were tested under different mechanically applied forces and showed reproducible results for the static coefficient of friction. With the same setup the measurements were performed under an electric field as the source of the normal force. Up to a certain electric field the values were in good agreement. Beyond this field discrepancies were found.

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Section: Introductionmentioning

confidence: 99%

Frictional behaviour of polymer films under mechanical and electrostatic loads

Ginés¹,

Bergamini²,

Christen³

et al. 2013

Smart Mater. Struct.

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“…Friction damping can be implemented in a passive [8,15] or semi-active [6,10,19] manner. With friction, energy is dissipated and in order to obtain a semi-active damper, the normal force F N as shown in equation (1), where F R is the friction force and μ is the coefficient of friction (COF), has to be controlled:…”

Section: Friction Dampingmentioning

confidence: 99%

“…To achieve an equal eigenfrequency in the cantilever beam with the composite material as with the PVDF, a lower electric field has to be applied. This reduction is listed in table 4 for different measured eigenfrequencies (14,15,16,17 and 18 Hz) in percent with respect to PVDF.…”

Section: Eigenfrequencymentioning

confidence: 99%

Stiffening and damping capacity of an electrostatically tuneable functional composite cantilever beam

Ginés

Bergamini

Motavalli

et al. 2015

Smart Mater. Struct.

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The damping capacity of a novel composite film, designed to exhibit high dielectric strength and a high friction coefficient for an electrostatic tuneable friction damper, is tested on a cantilever beam. Such a system consists of a carbon fibre reinforced polymer stiffening element which is reversibly laminated onto a host structure with a dielectric material by means of electrostatic fields. Damping is achieved when the maximum shear at the interface between the stiffening element and structure exceeds the shear strength of the electrostatically laminated interface. The thin films tested consist of barium titanate particles and alumina platelets in an epoxy matrix. Their high dielectric constant and high coefficient of friction compared to a commercial available polymer film, polyvinylidene fluoride, lead to a reduction of the required electric field to stiffen and damp the cantilever beam. Reducing the operating voltage affects different aspects of the studied damper. The cost of possible applications of the frictional damper can be reduced, as the special components necessary at high voltages become redundant. Furthermore, the enhanced security positively affects the damping system’s appeal as an alternative damping method.

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