An experimental study of vibration attenuation performance of several on-grade slab configurations

Amick, Hal; Wongprasert, N.; Montgomery, J.; Haswell, P.; Lynch, David T.

doi:10.1117/12.618188

Cited by 4 publications

(7 citation statements)

References 1 publication

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“…The reduction in the total vibration level, using the RMS value defined in Eq. (12), was found to be 77%. Fig.…”

Section: Prediction Of Reduction Levelmentioning

confidence: 93%

“…Consider- ing a walking rate of less than 2.5 Hz, the frequency content within the range of interest (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) can be assumed to be constant in amplitude [31,32]. A harmonic unit load was applied on the concrete slab 8 m from the outer boundary.…”

Section: Prediction Of Reduction Levelmentioning

confidence: 99%

“…The reduction of displacements shown in Figs. [8][9][10][11][12][13] was evaluated in terms of RMS values (see Eq. (11)) for all nodes on top of the slab relative to a slab on soil with reference material parameters.…”

Section: Slab On Stabilised Soil Volumementioning

confidence: 99%

“…They noted that the obtained vibration reduction depends on the ratio of the present wavelength and dimensions of the slab-on-grade. Amick et al [12] conducted an experimental study on three types of concrete slabs to determine their vibration reduction ability: (i) a 300 mm solid slab, (ii) 300 mm slab with a separated island of 900 mm and (iii) the same as the latter but the island was placed on concrete piles instead of soil. The vibrations were evaluated with both external and internal excitation sources.…”

Section: Introductionmentioning

confidence: 99%

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Numerical study on reducing building vibrations by foundation improvement

Persson

Sandberg

2016

Engineering Structures

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“…The reduction in the total vibration level, using the RMS value defined in Eq. (12), was found to be 77%. Fig.…”

Section: Prediction Of Reduction Levelmentioning

confidence: 93%

Section: Prediction Of Reduction Levelmentioning

confidence: 99%

Section: Slab On Stabilised Soil Volumementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical study on reducing building vibrations by foundation improvement

Persson

Sandberg

2016

Engineering Structures

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“…e conclusion showed that a thickened slab can be an effective measure for reducing external vibrations. Amick et al [20] studied the vibration reduction efficiency of different slab types via vibration measurements and found that the piled-slab foundation performed better than the slab-on-grade foundation in reducing the vertical vibrations generated by external excitation sources. Persson et al [8,21] conducted a series of numerical studies on reducing building vibrations by subsoil improvement and found that improving the mechanical properties of the subgrade soil had a greater effect on controlling the vibration levels in a building for both external and internal vibration sources.…”

Section: Introductionmentioning

confidence: 99%

Vibration Measurement and Prediction for Foundation Slab Design of a High-Tech Lab Based on In Situ Testing

Lou²,

Chen³

2020

Shock and Vibration

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Reduction of road traffic-induced vibrations has gained importance with rapid development of high-tech industry and nanotechnology. This study focuses on the in situ vibration measurement and transmissibility-based vibration prediction for the foundation slab design of a high-tech lab subjected to truck-induced vibrations. The truck-induced vibrations come from a proposed road 30 m away from the high-tech lab. The allowable vertical vibration velocity for the foundation slab of the high-tech lab was 60 μm/s in the frequency range of 5–50 Hz. The truck-induced ground vibrations in the proximity of an existing road with the same design as the proposed road were taken as the vibration source response used in the foundation design. The ground vibration transmissibility from the proposed road area to the high-tech lab area was determined by conducting frequency sweep tests in the free field. Based on the vibration source response and the ground vibration transmissibility, two antivibration foundation prototypes with different thicknesses were constructed at the site. The vibration transmissibility from the subgrade soil to the surfaces of the two foundation prototypes was obtained by measuring the ground vibrations at the high-tech lab area and the surface vibrations of the two foundation prototypes. The vertical vibration velocities of the two foundation prototypes were predicted based on the measured transmissibility and the vibration source response. The final thickness of the antivibration foundation was determined by comparing the predicted vibration velocities with the allowable vibration velocity. After construction of the high-tech lab and the road, vibration tests were conducted to assess the performance of the actual antivibration foundation. The results showed that the actual antivibration foundation was able to reduce the vibration levels at the high-tech lab to acceptable levels.

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In situ experimental study of vibration reduction using thick concrete slabs with natural and cement-improved subgrade

Xu¹,

Lou²,

Chen³

2023

Journal of Vibration and Control

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Thickening the foundation slab and improving the subgrade soil using geo-techniques are effective measures for controlling unwanted vibrations at high-tech facilities. In this study, the vibration-reduction performance of 1-m-thick concrete slabs with natural and cement-improved subgrades was investigated based on in situ frequency sweep tests. One 1-m-thick concrete slab rested on 1-m-thick compacted sandy gravel backfill atop an undisturbed subgrade was constructed on the north side of the experimental site, and another identical concrete slab rested on 1-m-thick compacted sandy gravel backfill atop a cement-improved subgrade was constructed on the south side. The vibration-reduction effect was evaluated by comparing the free-field ground vibrations and surface vibrations of the two slabs at three pairs of evaluation locations. In terms of peak velocity, the 1-m-thick concrete slab with the natural subgrade exhibited a slight vibration amplification effect at low frequencies and a significant reduction effect at middle and high frequencies; the 1-m-thick concrete slab with the cement-improved subgrade exhibited a continuous vibration reduction action at all frequencies. In terms of RMS velocity, the vibration-reduction performance of the 1-m-thick concrete slab with the cement-improved subgrade was better than that with the natural subgrade. The results demonstrated that the vibration-reduction effect of the thick concrete slab was significant and could be increased by improving the subgrade using the cement grouting method.

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An experimental study of vibration attenuation performance of several on-grade slab configurations

Cited by 4 publications

References 1 publication

Numerical study on reducing building vibrations by foundation improvement

Numerical study on reducing building vibrations by foundation improvement

Vibration Measurement and Prediction for Foundation Slab Design of a High-Tech Lab Based on In Situ Testing

In situ experimental study of vibration reduction using thick concrete slabs with natural and cement-improved subgrade

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