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A platform for research: civil engineering, architecture and urbanism
The effect of foundation–soil–foundation interaction on the response of continuous, multi-span railway bridges
https://orcid.org/0000-0003-2774-8003
https://orcid.org/0000-0002-9273-3038
Abstract This paper focuses on the effect of dynamic soil–structure interaction (SSI), including foundation–soil–foundation interaction (FSFI), on the dynamic response of multi-span railway bridges, which constitute an important part of high-speed rail networks around the world. We consider an infinitely long box girder bridge on piled foundations and use periodic structure theory to restrict the computational domain to a reference cell. The superstructure is modeled with finite elements, while a periodic finite element-boundary element (FE-BE) model is used to compute the dynamic stiffness of the piled foundation, taking into account FSFI. It is demonstrated that (1) the natural frequencies of the in-phase torsional and bending modes are significantly lowered due to the flexibility of the foundation–soil system; (2) the effect of FSFI on the bridge response is limited for typical span lengths and soil stiffness; and (3) the peak bridge deck acceleration is lower if SSI is taken into account, as is the resonant train speed.
Highlights Dynamic SSI of multi-span bridges is analyzed with periodic FE-BE models. An infinitely long, concrete box girder bridge on piled foundations is considered. Dynamic SSI reduces resonance frequencies of in-phase modes and mid-span acceleration. Foundation–soil–foundation interaction has negligible impact on bridge response.
The effect of foundation–soil–foundation interaction on the response of continuous, multi-span railway bridges
https://orcid.org/0000-0003-2774-8003
https://orcid.org/0000-0002-9273-3038
Abstract This paper focuses on the effect of dynamic soil–structure interaction (SSI), including foundation–soil–foundation interaction (FSFI), on the dynamic response of multi-span railway bridges, which constitute an important part of high-speed rail networks around the world. We consider an infinitely long box girder bridge on piled foundations and use periodic structure theory to restrict the computational domain to a reference cell. The superstructure is modeled with finite elements, while a periodic finite element-boundary element (FE-BE) model is used to compute the dynamic stiffness of the piled foundation, taking into account FSFI. It is demonstrated that (1) the natural frequencies of the in-phase torsional and bending modes are significantly lowered due to the flexibility of the foundation–soil system; (2) the effect of FSFI on the bridge response is limited for typical span lengths and soil stiffness; and (3) the peak bridge deck acceleration is lower if SSI is taken into account, as is the resonant train speed.
Highlights Dynamic SSI of multi-span bridges is analyzed with periodic FE-BE models. An infinitely long, concrete box girder bridge on piled foundations is considered. Dynamic SSI reduces resonance frequencies of in-phase modes and mid-span acceleration. Foundation–soil–foundation interaction has negligible impact on bridge response.
The effect of foundation–soil–foundation interaction on the response of continuous, multi-span railway bridges
https://orcid.org/0000-0003-2774-8003
https://orcid.org/0000-0002-9273-3038
Abstract This paper focuses on the effect of dynamic soil–structure interaction (SSI), including foundation–soil–foundation interaction (FSFI), on the dynamic response of multi-span railway bridges, which constitute an important part of high-speed rail networks around the world. We consider an infinitely long box girder bridge on piled foundations and use periodic structure theory to restrict the computational domain to a reference cell. The superstructure is modeled with finite elements, while a periodic finite element-boundary element (FE-BE) model is used to compute the dynamic stiffness of the piled foundation, taking into account FSFI. It is demonstrated that (1) the natural frequencies of the in-phase torsional and bending modes are significantly lowered due to the flexibility of the foundation–soil system; (2) the effect of FSFI on the bridge response is limited for typical span lengths and soil stiffness; and (3) the peak bridge deck acceleration is lower if SSI is taken into account, as is the resonant train speed.
Highlights Dynamic SSI of multi-span bridges is analyzed with periodic FE-BE models. An infinitely long, concrete box girder bridge on piled foundations is considered. Dynamic SSI reduces resonance frequencies of in-phase modes and mid-span acceleration. Foundation–soil–foundation interaction has negligible impact on bridge response.
The effect of foundation–soil–foundation interaction on the response of continuous, multi-span railway bridges
Reumers, P. (author) / Lombaert, G. (author) / Degrande, G. (author)
Engineering Structures ; 299
2023-10-26
Article (Journal)
Electronic Resource
English
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