Experimental study of a stiff wave barrier in gelatine |
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| Institution: | 1. KU Leuven, Department of Civil Engineering, Kasteelpark Arenberg 40, B-3001 Leuven, Belgium;2. University of Cambridge, Department of Engineering, Trumpington Street, Cambridge CB2 1PZ, United Kingdom;1. School of Civil Engineering, University of Birmingham, B15 2TT, United Kingdom;2. Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Malaysia;1. Department of Civil Engineering, Santa Maria University, Valparaiso, Chile;2. Department of Mechanical Engineering, University of Thessaly, GR-38334 Volos, Greece;1. Institute for Industrial, Radiophysical and Environmental Safety, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain;2. Research Centre in Mechanical Engineering, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain;3. Tribology and Interfacial Chemistry Group, École Polytechnique Fédérale de Lausanne, Route Cantonale, 1015 Lausanne, Switzerland;1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, PR China;2. Department of Civil and Environmental Engineering, University of Houston, Houston, TX 77004, USA |
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| Abstract: | Railway induced vibrations and re-radiated noise in buildings can be mitigated by means of wave barriers in the soil. Numerical simulations demonstrate that a stiff wave barrier, consisting of a material that is stiffer than the surrounding medium, can be very effective if the stiffness contrast between the barrier and the medium is sufficiently large. This paper presents results of a lab experiment that has been carried out to validate these findings, using gelatine instead of soil in order to reduce the wavelengths and thus the scale of the test setup. An expanded polystyrene beam is employed as wave barrier, while a non-contact measurement procedure is applied for visualizing the waves in the gelatine, based on reflections of a grid of laser rays. The experimental results are found to be in line with the numerical predictions, confirming the vibration reduction effectiveness of stiff wave barriers. |
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| Keywords: | Dynamic soil–structure interaction Elastodynamic wave propagation Wave barrier Lab experiment Non-contact measurement procedure |
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