Vibration serviceability of timber floors in residential construction

Hu, Luojia; Chui, Ying Hei; Onysko, Donald M.

doi:10.1002/pse.69

Cited by 54 publications

(40 citation statements)

References 6 publications

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“…Hu et al [19][20][21] have carried out in situ tests on hundreds of floors in Canada during extensive research programs, first in the 1980s and then in the late 1990s, to develop serviceability design criteria for timber floors. The average damping ratio found for joist floors with a concrete topping was 3.6%.…”

Section: Introductionmentioning

confidence: 99%

Vibration properties of a timber floor assessed in laboratory and during construction

Jarnerö¹,

Brandt

Olsson

2015

Engineering Structures

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Section: Introductionmentioning

confidence: 99%

Vibration properties of a timber floor assessed in laboratory and during construction

Jarnerö¹,

Brandt

Olsson

2015

Engineering Structures

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“…In North America, wood-framed construction is common for residential housings, making timber floor vibration control an interesting research area. Many approaches to preventing timber floor vibration have been developed by researchers, which has been summarized by Hu and Chui, 2001. There are six approaches, namely, limit on uniform distributed live-load deflection, limit on point-load deflection, limit on point-load deflection and peak-velocity due to unit impulse, limit on fundamental frequency and frequency-weighted root-mean-square acceleration, limit on fundamental natural frequency, and limit on a combination of the parameters mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Field Testing and Investigation of the Dynamic Performance and Comfort of Timber Floors

Xiong

Kang

Lü

2011

Journal of Asian Architecture and Building Engineering

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Field tests were conducted on timber floors in three wood-framed buildings in order to obtain their dynamic characteristics and evaluate the vibration comfort. The measured fundamental vibration frequency, damping ratio and root-mean-square acceleration, were used to evaluate human comfort caused by timber floor vibration. The results show that the fundamental vibration period of the thirteen tested timber floors was between 9.96Hz and 18.70Hz, which is sufficiently outside the frequency range of human activities excitation to preclude the resonance of timber floors. The thirteen timber floors in the test program satisfied the vibration control standards when the vibration environments and duration were taken into consideration. The damping ratios of the timber floors show a strong amplitude dependence, with high damping ratios correlated with large vibration amplitude. The average value of the damping ratio obtained from the impulse load tests was 5.05%, which was suitable for timber floors under normal human activities. In practice, vibration should be considered during the design of large-span timber floors.

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“…Both cooling and heating can operate on a number of SMA elements and, after combination, an effective tuning frequency and enough damping capacity are expected to be achieved. 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 f 1 (Hz) (2) T ( o C) (3) k 2 (N/m) (4) ξ 2 (%) (5) m 2 (kg) (6) f 2 (Hz) (1) mass attached to the steel cantilever beam (2) natural frequency of the main structure (3) working temperature of the SMA beam (4) stiffness of the SMA beam (5) equivalent damping ratio of the SMA beam (6) mass attached to the SMA beam (7) natural frequency of the TMD 1 2 3 4 5 ...…”

Section: Resultsmentioning

confidence: 99%

Feasibility of shape memory alloy in a tuneable mass damper to reduce excessive in-service vibration

Huang

Chang

Mosalam

2016

Struct. Control Health Monit.

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Summary The applications of shape memory alloy (SMA) in vibration reduction are benefited by its superelasticity and thermomechanical properties. This study is a part of a series of research projects focused on reduction of timber floor vibration. In this study, the feasibility of this tuneable mass damper is tested for in‐service vibration reduction. At first, the effect of temperature ranging from 11 °C to 120 °C on the dynamic characteristics of SMA was investigated under different pre‐stressed levels. At higher temperatures, the damping ratio reduces while stiffness increases, and vice versa with decreasing temperature. SMA is sensitive to temperature when the pre‐stressed level is near the phase transformation stress. Next, the analytical model of timber floor system was built and idealised as a two‐degree‐of‐freedom system. Thirdly, a series of lab tests were carried out, and a damper consisting of an SMA bar was added on a cantilever beam with different natural frequencies, which represents floor system in the model. The results show that the vibration response of the system can be significantly reduced by the damper developed in this project, when the damper has resonance with the system. The mass of the system was then changed so as to make the damper out‐of‐tuned; the damper was then retuned by cooling/heating on SMA. After retuning of the damper, the response of the system was effectively reduced, which demonstrates the effectiveness and feasibility of employing SMA in the damper system. Copyright © 2016 John Wiley & Sons, Ltd.

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Vibration serviceability of timber floors in residential construction

Cited by 54 publications

References 6 publications

Vibration properties of a timber floor assessed in laboratory and during construction

Vibration properties of a timber floor assessed in laboratory and during construction

Field Testing and Investigation of the Dynamic Performance and Comfort of Timber Floors

Feasibility of shape memory alloy in a tuneable mass damper to reduce excessive in-service vibration

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