Conference_programme: 17.6 - Predicting vibration / impact / structure-borne sound in buildings
Lecture: In-situ performances prediction of base-isolated buildings
Author(s): Trévisan Benjamin, Grau Loïc, Bozzetto Denis, Villot Michel, Jean Philippe
Summary:
Noise is one of the main causes of disturbance in buildings. Indeed, the acoustic comfort is clearly linked to the insulation of the receiving room from the others and from the outside. Railway traffic can generate structure-borne noise, i.e. noise induced by vibration of floors, walls and ceilings. Between source and building rooms, such vibration successively propagates through soil, building foundation and building structures. Separating the foundation from the rest of the building with a resilient material constitutes a good solution to reduce structure-borne noise. The European BIOVib project (Building Insulation against Outdoor Vibrations) aims at quantifying and predicting the in-situ performance of such isolators in term of Power Flow Insertion Gain (PFIG) and Building Insertion Loss Indicator (BILI). A simplified method for quantifying and predicting these in-situ performances consists in using a vibrational model based on mobility, taking into account isolator and receiving structure (building foundation and superstructure) dynamic properties, but limited to vertical vibration only. This simplification is discussed in this paper and the performances obtained compared to the ones calculated using a more accurate modelling where both vertical and horizontal vibration components are taking into account. These comparisons are performed for different ground/structure configurations in order to estimate the uncertainty of the simplified method.
Corresponding author
Name: Dr Benjamin Trévisan
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: France
