Abstract
This paper presents the problem of vibration transmission in building structures, which is induced by rail transport, and it discusses the effect of acoustic isolation used at the foundation. The vibration sources generate acoustic waves which are transmitted to the foundation and propagate trough the floors and slabs of the building. The transmission coefficients of the acoustic waves induced by metro trains and trams were determined in the building foundation and slabs. It was shown that mechanical resonances have a significant influence on the vibrations of the slabs. The characteristics of vibration propagation through vibration-insulated floors were found. Using the data obtained in this study, vibration effects in buildings located near vibration sources can be estimated, vibration protection measures can be developed.
Highlights
Tramways, and railways are sources of vibration impact in the buildings located near rail transport
Measurement data of the vibration propagation in the buildings is required for predicting vibration effects and developing vibration protection solutions
The vibration transmission coefficients between the foundation and the slabs in buildings with vibration-insulated foundations differ from those recommended in the literature on the established technical standards [4], which should be taken into account when looking for vibration isolation solutions
Summary
Tramways, and railways are sources of vibration impact in the buildings located near rail transport. The reduction of the vibration impact can be accomplished through various measures, by isolating the structure of the railway tracks or by protecting the buildings from vibrations [2, 3]. The most common solution for vibration isolation in buildings is accomplished by the insertion of a discrete or continuous elastic layer between the exterior walls of the foundation and the ground. The presence of such a layer significantly reduces the oscillations in the building. Measurement data of the vibration propagation in the buildings is required for predicting vibration effects and developing vibration protection solutions. It should be noted that this work is a continuation of experimental studies on the transmission of railway induced vibrations to buildings and their further propagation over the building structures [5, 6]
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