A master thesis from Aalborg University
Vibrationer fra togtrafik: Femern Bælt-forbindelse
[Vibrations from railway traffic: The Femern Belt Link]
Author(s)
Term
4. term
Education
Publication year
2011
Submitted on
2011-06-10
Pages
96 pages
Abstract
This thesis concerns vibrations from trains running on the planned railway on the Danish side of the Femern Belt Link. The vibrations emanating from the passing trains are analyzed in relation to a reference building place 25m from a new planned railway. The amplitudes of the waves are evaluated on two soil profiles, as well as the response of two different structures, with different boundary conditions. The amplitudes are evaluate with respect to distance from the source to the reference building and frequency of the train load application, and especially the transmission of waves originated in the soil into the reference building is analyzed. The response of the soil and the structure is found in an uncoupled model, base on the Boundary Element Method and the Finite Element Method, as well as a coupled model combining BEM and FEM. It is found, that the response of the soil, is highly influenced by the response of the building near its natural frequencies. At the eigenfrequency of the structure, the response of the soil is balanced by reaction forces from the building in the coupled model. This can give rise to reductions of the soil response of up to 80% in the coupled model.
Keywords
vibrations ; finite ; element ; boundary ; femern ; belt ; elastodynamic ; wave ; transmission ; soil ; structure ; interaction
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