VIBRATIONS IN BUILDINGS DUE TO RAILWAY TRAFFIC IN TUNNELS: MODELLING STRATEGIES AND INFLUENCE OF SOIL STIFFNESS
Abstract eng: In this paper a numerical study about the influence of soil stiffness on the assessment of vibrations induced by railway traffic in tunnels is performed. A comprehensive numerical model is used to achieve the lumped objective, where the source of vibration (traintrack interaction), the propagation of vibrations (tunnel-ground system) and their reception (building close to the railway infrastructure) are simulated by a sub-structuring approach. It was found that the soil stiffness plays a relevant role on the mechanisms of propagation of vibrations through the ground as well as on the soil-structure interaction. Regarding the last topic, different approaches were attended for the inclusion of the SSI effects, namely a detailed boundary elements formulation and a simplified lumped-parameter model. The study performed revealed that the usage of lumped parameter models can be faced as a good option taking into account the compromise between accuracy of the solution and reduction of the computation effort.
Contributors:
Publisher:
National Technical University of Athens, 2015
Conference Title:
Conference Title:
COMPDYN 2015 - 5th International Thematic Conference
Conference Venue:
Crete (GR)
Conference Dates:
2015-05-25 / 2015-05-27
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
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Record created 2017-06-22, last modified 2017-06-22