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Numerical study on reducing building vibrations by foundation improvement

Persson, Peter LU ; Persson, Kent LU and Sandberg, G. LU (2016) In Engineering Structures 124. p.361-375
Abstract

Vibration disturbances in buildings may stem from ambient sources, such as motorway traffic, or from internal sources such as people walking inside the building. Vibrations can exceed requirements for sensitive equipment or cause annoyance to humans and therefore the vibrations may need to be reduced. Vibrations from both external and internal sources can be reduced by modifying the properties of concrete slabs and of the soil underneath. Soil can be improved by being mixed with a binder material in order to increase its stiffness. In this study, parametric finite element analyses were conducted on the achieved vibration reduction on a slab on soil from improving the properties of a concrete slab on soil or of the soil underneath. The... (More)

Vibration disturbances in buildings may stem from ambient sources, such as motorway traffic, or from internal sources such as people walking inside the building. Vibrations can exceed requirements for sensitive equipment or cause annoyance to humans and therefore the vibrations may need to be reduced. Vibrations from both external and internal sources can be reduced by modifying the properties of concrete slabs and of the soil underneath. Soil can be improved by being mixed with a binder material in order to increase its stiffness. In this study, parametric finite element analyses were conducted on the achieved vibration reduction on a slab on soil from improving the properties of a concrete slab on soil or of the soil underneath. The size, elastic modulus, and depth of the stabilised soil were found to markedly affect the level of reduction obtained. The soil stabilisation at a vibration-sensitive facility was used as an example case, where the developed finite element model was calibrated to green-field measurements carried out on-site. Frequency spectra of both road traffic loads and internal pedestrian loads were considered in the model. The calibrated finite element model predicted reductions of almost 60% for the road traffic and 80% for the pedestrian load.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Finite element method, Soil dynamics, Soil improvement, Soil stabilisation, Vibration measurements, Vibration reduction measure, Wave propagation
in
Engineering Structures
volume
124
pages
15 pages
publisher
Elsevier
external identifiers
  • Scopus:84976622277
  • WOS:000382793900026
ISSN
0141-0296
DOI
10.1016/j.engstruct.2016.06.020
language
English
LU publication?
yes
id
7da9ef2a-83a9-48a6-82ef-cca6b118234e
date added to LUP
2016-07-18 11:17:49
date last changed
2017-01-01 08:30:38
@article{7da9ef2a-83a9-48a6-82ef-cca6b118234e,
  abstract     = {<p>Vibration disturbances in buildings may stem from ambient sources, such as motorway traffic, or from internal sources such as people walking inside the building. Vibrations can exceed requirements for sensitive equipment or cause annoyance to humans and therefore the vibrations may need to be reduced. Vibrations from both external and internal sources can be reduced by modifying the properties of concrete slabs and of the soil underneath. Soil can be improved by being mixed with a binder material in order to increase its stiffness. In this study, parametric finite element analyses were conducted on the achieved vibration reduction on a slab on soil from improving the properties of a concrete slab on soil or of the soil underneath. The size, elastic modulus, and depth of the stabilised soil were found to markedly affect the level of reduction obtained. The soil stabilisation at a vibration-sensitive facility was used as an example case, where the developed finite element model was calibrated to green-field measurements carried out on-site. Frequency spectra of both road traffic loads and internal pedestrian loads were considered in the model. The calibrated finite element model predicted reductions of almost 60% for the road traffic and 80% for the pedestrian load.</p>},
  author       = {Persson, Peter and Persson, Kent and Sandberg, G.},
  issn         = {0141-0296},
  keyword      = {Finite element method,Soil dynamics,Soil improvement,Soil stabilisation,Vibration measurements,Vibration reduction measure,Wave propagation},
  language     = {eng},
  month        = {10},
  pages        = {361--375},
  publisher    = {Elsevier},
  series       = {Engineering Structures},
  title        = {Numerical study on reducing building vibrations by foundation improvement},
  url          = {http://dx.doi.org/10.1016/j.engstruct.2016.06.020},
  volume       = {124},
  year         = {2016},
}