Numerical study on reducing building vibrations by foundation improvement

Persson, Peter; Persson, Kent; Sandberg, Göran

doi:10.1016/j.engstruct.2016.06.020

Cited by 19 publications

(8 citation statements)

References 13 publications

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“…It is shown that the dynamic interaction between soil and building foundations has a great impact on the vibration transmission from the ground to the building and that the maximum acceleration decreases with the soil shear wave velocity increase [47].…”

Section: Ground Improvement For Reducing Vibration Transmission and Smentioning

confidence: 99%

Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

2020

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Constructing buildings above subway tracks exploits urban-area space intensively by adopting the three-dimensional overlapping development mode, which is one of the important measures for solving the contradictions among urban population increase, land resource shortage, and environmental protection. However, the vibration generated by the frequent train operations is transmitted to the upper buildings through the track structure and ground soil, which can cause structural vibrations and radiated noise and bring physical and mental side effects to occupants within the buildings. Subway projects are often located in geologically sensitive areas, while the influences of the encountered geological problems on the generation and propagation of structural vibration and structure-radiated noise within the buildings are not yet clear. Hence, this paper presents a method of studying the train-induced vibration transmission from the ground up into the buildings and the structure-radiated noise within the building. The method consists of a train-track model, track-soil-building model, and structure-radiated noise simulation. The impact of soil properties on the building vibration and structure-radiated noise is analyzed and ground-improvement measures are proposed in order to mitigate vibration and structure-radiated noise within buildings. The results show that the interaction between soil and structure has a great impact on vibration transmission from the ground into the building. Good foundations reduce vibration transmission from ground soil up into the building and lead to a lower level of structure-radiated noise. Ground improvements increase the impedance of ground soil, thereby weakening the vibration transmission and lowering the structure-radiated noise.

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Section: Ground Improvement For Reducing Vibration Transmission and Smentioning

confidence: 99%

Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

2020

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“…An environmental vibration problem can be divided into three parts: the excitation source that generates vibrations, the medium that transmits the vibrations, and the receiver that must be protected from the vibrations [8,9]. Accordingly, measures to reduce unwanted vibrations can be applied in the proximity of excitation sources, in the vibration propagation path, and at the buildings that should be protected.…”

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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“…When the railway is on the ground, vibration is transmitted from the railway to the structure mainly by Rayleigh waves. Setting trenches is a useful approach in the case of Rayleigh waves . However, when the track is underground, vibration is transmitted to a building by body waves.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of isolation in the backfill zone of foundation pit method to reduce railway generated vibration in high‐rise buildings

Pan

Zeng

Yang

et al. 2019

Structural Design Tall Build

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The conventional methods to reduce building vibration include isolation of vibration sources, isolation of buildings, and setting trenches in the propagation path. However, it is evidenced that these methods are not feasible for high-rise buildings in crowded urban areas. This paper proposes a new method to reduce vibration for high-rise buildings by using the existing construction backfill zone, the isolation in the backfill zone of foundation pit (IBF). Numerical analyses were first carried out to obtain a realistic excitation time history, and a finite element-infinite element model was developed and calibrated using test data from an actual building site. The contributions of the basement sidewalls and foundation slabs to floor vibration and the influence of infill material properties are investigated. Lastly, a composite isolation layer was suggested to provide both sufficient restraining effects to the building foundation and satisfactory vibration isolation. The analyses confirmed that the proposed IBF method reduces ground-borne vibration in high-rise buildings by up to 66% when railway is on the ground. KEYWORDSbackfill zone of foundation pit, composite isolation layer, finite element-infinite element, high-rise building, inverse procedure, railway generated vibration reduction

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Numerical study on reducing building vibrations by foundation improvement

Cited by 19 publications

References 13 publications

Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

Train-Induced Building Vibration and Radiated Noise by Considering Soil Properties

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

Numerical study of isolation in the backfill zone of foundation pit method to reduce railway generated vibration in high‐rise buildings

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