Base-isolated structure equipped with tuned liquid column damper: An experimental study

Antonina Pirrotta, Alberto Di Matteo, Thomas Furtmüller, Antonina Pirrotta, Christoph Adam

Risultato della ricerca: Article

6 Citazioni (Scopus)

Abstract

In this study, a novel passive vibration control strategy is investigated experimentally, where a Tuned Liquid Column Damper protects a base-isolated structure. The Tuned Liquid Column Damper is attached to the base, in contrast to typical attachment points of passive energy dissipation devices in high-rise buildings at elevated levels. Experiments on a base-excited small-scale three-story shear frame are conducted in order to study effects of both control devices - base-isolation and Tuned Liquid Column Damper - on the structural model. The dynamic properties of the stand-alone shear frame and the base-isolation subsystem are derived using standard dynamic test methods based on displacement and acceleration response measurements. In the base-isolation subsystem both viscous damping and friction effects are identified. The water level of the Tuned Liquid Column Damper is tracked by means of computational image processing of video recordings, facilitating the identification of the fundamental liquid motion mode as well as the nonlinear damping properties. An experimental parametric study is conducted for three Tuned Liquid Column Damper devices with different frequency tuning ratios. The assessment of the hybrid control strategy is based on the determined transfer functions of the studied setups. Experimental outcomes confirm recent theoretical findings that a passive hybrid control strategy combining a base-isolation and a Tuned Liquid Column Damper reduces the displacement demand of the base-isolation subsystem as well as the total story acceleration demand if both control devices are properly tuned. (C) 2018 Elsevier Ltd. All rights reserved.
Lingua originaleEnglish
pagine (da-a)816-831
Numero di pagine16
RivistaMechanical Systems and Signal Processing
Volume116
Stato di pubblicazionePublished - 2019

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Liquids
Damping
Video recording
Vibration control
Water levels
Transfer functions
Energy dissipation
Image processing
Tuning
Friction
Experiments

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications

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Base-isolated structure equipped with tuned liquid column damper: An experimental study. / Pirrotta, Antonina; Di Matteo, Alberto; Furtmüller, Thomas; Pirrotta, Antonina; Adam, Christoph.

In: Mechanical Systems and Signal Processing, Vol. 116, 2019, pag. 816-831.

Risultato della ricerca: Article

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abstract = "In this study, a novel passive vibration control strategy is investigated experimentally, where a Tuned Liquid Column Damper protects a base-isolated structure. The Tuned Liquid Column Damper is attached to the base, in contrast to typical attachment points of passive energy dissipation devices in high-rise buildings at elevated levels. Experiments on a base-excited small-scale three-story shear frame are conducted in order to study effects of both control devices - base-isolation and Tuned Liquid Column Damper - on the structural model. The dynamic properties of the stand-alone shear frame and the base-isolation subsystem are derived using standard dynamic test methods based on displacement and acceleration response measurements. In the base-isolation subsystem both viscous damping and friction effects are identified. The water level of the Tuned Liquid Column Damper is tracked by means of computational image processing of video recordings, facilitating the identification of the fundamental liquid motion mode as well as the nonlinear damping properties. An experimental parametric study is conducted for three Tuned Liquid Column Damper devices with different frequency tuning ratios. The assessment of the hybrid control strategy is based on the determined transfer functions of the studied setups. Experimental outcomes confirm recent theoretical findings that a passive hybrid control strategy combining a base-isolation and a Tuned Liquid Column Damper reduces the displacement demand of the base-isolation subsystem as well as the total story acceleration demand if both control devices are properly tuned. (C) 2018 Elsevier Ltd. All rights reserved.",
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T1 - Base-isolated structure equipped with tuned liquid column damper: An experimental study

AU - Pirrotta, Antonina

AU - Di Matteo, Alberto

AU - Furtmüller, Thomas

AU - Pirrotta, Antonina

AU - Adam, Christoph

PY - 2019

Y1 - 2019

N2 - In this study, a novel passive vibration control strategy is investigated experimentally, where a Tuned Liquid Column Damper protects a base-isolated structure. The Tuned Liquid Column Damper is attached to the base, in contrast to typical attachment points of passive energy dissipation devices in high-rise buildings at elevated levels. Experiments on a base-excited small-scale three-story shear frame are conducted in order to study effects of both control devices - base-isolation and Tuned Liquid Column Damper - on the structural model. The dynamic properties of the stand-alone shear frame and the base-isolation subsystem are derived using standard dynamic test methods based on displacement and acceleration response measurements. In the base-isolation subsystem both viscous damping and friction effects are identified. The water level of the Tuned Liquid Column Damper is tracked by means of computational image processing of video recordings, facilitating the identification of the fundamental liquid motion mode as well as the nonlinear damping properties. An experimental parametric study is conducted for three Tuned Liquid Column Damper devices with different frequency tuning ratios. The assessment of the hybrid control strategy is based on the determined transfer functions of the studied setups. Experimental outcomes confirm recent theoretical findings that a passive hybrid control strategy combining a base-isolation and a Tuned Liquid Column Damper reduces the displacement demand of the base-isolation subsystem as well as the total story acceleration demand if both control devices are properly tuned. (C) 2018 Elsevier Ltd. All rights reserved.

AB - In this study, a novel passive vibration control strategy is investigated experimentally, where a Tuned Liquid Column Damper protects a base-isolated structure. The Tuned Liquid Column Damper is attached to the base, in contrast to typical attachment points of passive energy dissipation devices in high-rise buildings at elevated levels. Experiments on a base-excited small-scale three-story shear frame are conducted in order to study effects of both control devices - base-isolation and Tuned Liquid Column Damper - on the structural model. The dynamic properties of the stand-alone shear frame and the base-isolation subsystem are derived using standard dynamic test methods based on displacement and acceleration response measurements. In the base-isolation subsystem both viscous damping and friction effects are identified. The water level of the Tuned Liquid Column Damper is tracked by means of computational image processing of video recordings, facilitating the identification of the fundamental liquid motion mode as well as the nonlinear damping properties. An experimental parametric study is conducted for three Tuned Liquid Column Damper devices with different frequency tuning ratios. The assessment of the hybrid control strategy is based on the determined transfer functions of the studied setups. Experimental outcomes confirm recent theoretical findings that a passive hybrid control strategy combining a base-isolation and a Tuned Liquid Column Damper reduces the displacement demand of the base-isolation subsystem as well as the total story acceleration demand if both control devices are properly tuned. (C) 2018 Elsevier Ltd. All rights reserved.

KW - Base-isolated structure

KW - Hybrid control strategy

KW - Optimal design

KW - Small-scale experiment

KW - Tuned liquid column damper

UR - http://hdl.handle.net/10447/356334

M3 - Article

VL - 116

SP - 816

EP - 831

JO - Mechanical Systems and Signal Processing

JF - Mechanical Systems and Signal Processing

SN - 0888-3270

ER -