Passive direction displacement dependent damping (D3) device

Nikoo K. Hazaveh; Geoffrey W. Rodgers; J. Geoffrey Chase; Stefano Pampanin

doi:10.5459/bnzsee.51.2.105-112

Nikoo K. Hazaveh University of Canterbury, Christchurch, New Zealand https://orcid.org/0000-0002-5058-0205
Geoffrey W. Rodgers University of Canterbury, Christchurch, New Zealand https://orcid.org/0000-0003-3907-0308
J. Geoffrey Chase University of Canterbury, Christchurch, New Zealand https://orcid.org/0000-0001-9989-4849
Stefano Pampanin University of Canterbury, Christchurch, New Zealand https://orcid.org/0000-0002-2714-6697

DOI: https://doi.org/10.5459/bnzsee.51.2.105-112

Abstract

Viscous fluid damping has been used worldwide to provide energy dissipation to structures during earthquakes. Semi-active dissipation devices have also shown significant potential to re-shape structural hysteresis behaviour and thus provide significant response and damage reduction. However, semi-active devices are far more complex and costly than passive devices, and thus potentially less robust over time. Ideally, a passive device design would provide the unique response behaviour of a semi-active device, but in a far more robust and low-cost device. This study presents the design, development and characterization of a passive Direction and Displacement Dependent viscous damping (D3) device. It can provide viscous damping in any single quadrant of the force-displacement hysteresis loop and any two in combination. Previously, this behaviour could only be obtained with a semi-active device. The D3 device is developed from a typical viscous damper, which is tested to evaluate the baseline of orifice sizing, force levels and velocity dependence. This prototype viscous damper is then modified in clear steps to produce a device with the desired single quadrant hysteresis loop. The overall results provide the design approach, device characterization and validation for this novel device design.

References

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Passive direction displacement dependent damping (D3) device

Abstract

References

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