Field measurement and FE prediction of vibration reduction due to pile-raft foundation for high-tech workshop

Gao, Guanghai; Juan, Chen; Yang, Jun; Meng, Yuan

doi:10.1016/j.soildyn.2017.08.009

Cited by 14 publications

(8 citation statements)

References 9 publications

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“…The results showed that the dominant parameter in reducing the slab vibrations was slab thickness. Gao et al [8] conducted in situ measurement and numerical simulation studies on a one story high-tech electronics workshop with a pileraft foundation to reveal the vibration reduction ability of the pile-raft foundation. It was showed that the pile-raft foundation had reduction effect on the horizontal vibrations in the frequency under 60 Hz and amplification effect on the vertical vibrations in the frequency over 30 Hz.…”

Section: Introductionmentioning

confidence: 99%

Study on Vibration Reduction Due to Pile-Raft Foundation for High-Tech Lab Based on Frequency Sweep Test

Yan

2021

Advances in Transdisciplinary Engineering

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Evaluation of the vibration reduction of piled-slab is of great significance for the layout of process and power equipment in high-tech facilities. In-situ measurement was performed to study the vibration reduction of the piled-slab of a high-tech lab. Slab vibrations with frequencies of 10 Hz to 60 Hz with steps 5 Hz were induced by an electromagnetic vibration exciter. INV3062U data acquisition device and 941B sensor were used to measure the velocities in the vertical direction at six measurement locations on the slab surface. For single frequency, the measurement results showed that the peak values of the slab vibration velocities generally decayed nonlinearly as the distance increased, however, the attenuations of 25 Hz, 35 Hz, 40 Hz, 50 Hz and 60 Hz slab vibrations were not monotonically.

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Section: Introductionmentioning

confidence: 99%

Study on Vibration Reduction Due to Pile-Raft Foundation for High-Tech Lab Based on Frequency Sweep Test

Yan

2021

Advances in Transdisciplinary Engineering

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“…Auersch concluded that slab thickness was the dominant parameter in controlling the vibration levels. Gao et al [18] performed field measurement and finite-element prediction on a high-tech electronics workshop to study the reduction effect of a pile-raft foundation on floor vibrations. e results demonstrated that the pile-raft foundation averaged the gap between the floor vibrations and the VC-B curve, showing an overall positive reduction action on the floor vibrations.…”

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 the first part of the Chinese Technical Code for Anti-Micro-Vibration Engineering of Electronics Industry (GB51076-2015), it is stipulated that the experimental testing of free-field vibration should be carried out before the construction of a proposed building to ensure the normal operation of sensitive instruments in the building ( 35 ). Gao et al ( 36 ) tested the ground-borne vibrations at the proposed location of a high-tech electronics workshop, and evaluated the vibration effect by the Bolt, Beranek, and Newman (BBN) ( 37 , 38 ) criteria. Certainly, some experimental results can be input into the established numerical model of a structure, which provides a good reference for the structural design of an electronics workshop ( 7 , 36 , 39 ).…”

mentioning

confidence: 99%

“…Gao et al ( 36 ) tested the ground-borne vibrations at the proposed location of a high-tech electronics workshop, and evaluated the vibration effect by the Bolt, Beranek, and Newman (BBN) ( 37 , 38 ) criteria. Certainly, some experimental results can be input into the established numerical model of a structure, which provides a good reference for the structural design of an electronics workshop ( 7 , 36 , 39 ).…”

mentioning

confidence: 99%

On-Site Experiment and Characteristics Analysis of Ground Vibrations Induced by Vehicle Loads Moving on an Urban Trunk Road

Cao

Yanɡ

2022

Transportation Research Record: Journal of the Transportation R

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In urban areas, the ground vibrations induced by vehicle loads are becoming an increasingly serious environmental issue, especially in the planning and design of high-tech workshops. In this paper, traffic flow and ground vibrations are simultaneously measured from the vehicles moving on a trunk road in Beijing from 9:30 a.m. to 9:30 p.m. The correlation between traffic volume and ground vibration is calculated to analyze the contribution of different vehicle types and density. The characteristics of ground vibration are revealed by analyzing the experimental data from the testing points of time history and frequency variety. Moreover, the attenuation law of ground vibration is summarized and well fitted by the Bornitz model. Finally, according to existing assessment standards, the vibration levels are effectively assessed. The results indicate that the concentration of multi-peak ground vibrations in a short time period can be attributed to the combination of vibration waves induced by vehicles close to each other. Two vibration peaks were observed in the frequency range of 10 Hz to 12.5 Hz and 2.5 to 4 Hz, close to the resonant frequencies of vehicle parts. The environmental vibrations induced by road traffic may exceed the allowable values stipulated in the relevant standards, and undoubtedly influence the normal operation of precise instruments, even at a distance beyond 100 m from the source.

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Field measurement and FE prediction of vibration reduction due to pile-raft foundation for high-tech workshop

Cited by 14 publications

References 9 publications

Study on Vibration Reduction Due to Pile-Raft Foundation for High-Tech Lab Based on Frequency Sweep Test

Study on Vibration Reduction Due to Pile-Raft Foundation for High-Tech Lab Based on Frequency Sweep Test

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

On-Site Experiment and Characteristics Analysis of Ground Vibrations Induced by Vehicle Loads Moving on an Urban Trunk Road

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