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Soil–structure interaction in resonant railway bridges
Abstract This paper explores dynamic soil–bridge interaction in high speed railway lines. The analysis was conducted using a general and fully three-dimensional multi-body finite element–boundary element model formulated in the time domain to predict vibrations caused by trains passing over the bridge. The vehicle was modelled as a multi-body system, the track and the bridge were modelled using finite elements and the soil was considered as a half-space by the boundary element method. The dynamic response of bridges to vehicle passage is usually studied using moving force and moving mass models. However, the multi-body system allows to consider the quasi-static and dynamic excitation mechanisms. Soil–structure interaction was taken into account by coupling finite elements and boundary elements. The paper presents the results obtained for a simply supported short span bridge in a resonant regime under different soil stiffness conditions.
Highlights ► Soil–structure interaction produces a variation of dynamic behavior of bridges. ► Resonant speeds are lower when soil–bridge interaction is considered. ► Resonance may occur at lower operation speeds when SSI is considered. ► The response in the abutment support depends on the soil stiffness.
Soil–structure interaction in resonant railway bridges
Abstract This paper explores dynamic soil–bridge interaction in high speed railway lines. The analysis was conducted using a general and fully three-dimensional multi-body finite element–boundary element model formulated in the time domain to predict vibrations caused by trains passing over the bridge. The vehicle was modelled as a multi-body system, the track and the bridge were modelled using finite elements and the soil was considered as a half-space by the boundary element method. The dynamic response of bridges to vehicle passage is usually studied using moving force and moving mass models. However, the multi-body system allows to consider the quasi-static and dynamic excitation mechanisms. Soil–structure interaction was taken into account by coupling finite elements and boundary elements. The paper presents the results obtained for a simply supported short span bridge in a resonant regime under different soil stiffness conditions.
Highlights ► Soil–structure interaction produces a variation of dynamic behavior of bridges. ► Resonant speeds are lower when soil–bridge interaction is considered. ► Resonance may occur at lower operation speeds when SSI is considered. ► The response in the abutment support depends on the soil stiffness.
Soil–structure interaction in resonant railway bridges
Romero, A. (Autor:in) / Solís, M. (Autor:in) / Domínguez, J. (Autor:in) / Galvín, P. (Autor:in)
Soil Dynamics and Earthquake Engineering ; 47 ; 108-116
10.07.2012
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Soil–structure interaction in resonant railway bridges
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