Vibration abatement of rectangular, trapezoidal and irregular-shaped joist-framed floors, using tune

Author: R. Kashani (DEICON)

Date published

4 January 2016

Price

Standard: £9 + VAT
Members/Subscribers: Free

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Vibration abatement of rectangular, trapezoidal and irregular-shaped joist-framed floors, using tune

Tag
Author
R. Kashani (DEICON)
Date published
4 January 2016
Price

Standard: £9 + VAT
Members/Subscribers: Free

The Structural Engineer
Author

R. Kashani (DEICON)

Date published

4 January 2016

Author

R. Kashani (DEICON)

Price

Standard: £9 + VAT
Members/Subscribers: Free

A tuned damping solution was developed to mitigate walking induced vibration of joist-framed floors in 25 rectangular, trapezoidal and irregular-shaped rooms in an educational facility. The make-up of the floors was concrete on metal deck, supported by open-web steel bar joists. The floors came in various sizes (800–1200sq.ft) and shapes, with the first resonant frequencies in the 6.5–7.5Hz range.


Following the measurement of vibration and finite element analysis of the floors, 50 tuned mass dampers
(TMDs) (two for each room) were designed, manufactured and installed to effectively address the vibration
challenges of the first structural modes of the floors they were designed for.


After installation of the TMDs, the effectiveness of the tuned damping solution was evaluated via further
measurements. TMDs effectively dampened the first structural modes of the floors in various rooms and
lowered their walking-induced vibration to acceptable levels.

Additional information

Format:
PDF
Pages:
5
Publisher:
The Institution of Structural Engineers

Tags

Project Focus Issue 1

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