CIMEC   24726
CENTRO DE INVESTIGACION DE METODOS COMPUTACIONALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Analysis of Soil-Structure Interaction Problems Using a Coupled FEM SBFEM Approach with Non-Matching Time Steps and Meshes
Autor/es:
MARCO SCHAUER; GUSTAVO A. RÍOS RODRIGUEZ
Lugar:
Glasgow
Reunión:
Conferencia; ECCM-ECFD 2018; 2018
Institución organizadora:
University of Glasgow, University of Edinburgh, CIMNE
Resumen:
Buildings are grounded in the surrounding soil, so that soil and structure interact with each other. Consequently the soil induced vibrations are transmitted to the structures. Neighbouring buildings and structures interact with each other, as they are connected by the soil. Nowadays numerical simulation of soil structure interaction is of great interest and is applied to very different problems. These include for example the construction of reliable earthquake-resistant structures in seismic active areas, and also to increase the comfort of buildings by decoupling them from surrounding emissions like vibrations induced by traffic of machinefoundations. To analyse soil-structure-interaction and taking unbounded domains into account a numerical implementation of a coupled finite element method and scaled boundary finite element method approach is used. This approach fulfills the Sommerfeld radiation condition exactly. The finite element method is used to discretise the near field, containing structures and its surrounding soil. The coupled infinite half-space the so called far field is realised by the scaled boundary finite element method. Both methods are coupled at a common interface, where near field, far field informations like nodal velocities and nodal forces are exchanged. Since computation of far field information needs more effort and compute time than computing the near field two different mesh resolutions as well as two different time step sizes are used. The elements in the near field are much smaller than those of the far field. This reduces the effort of far field computation. In order to exchange nodal information at the interface between the two meshes with non matching nodes mapping algorithms are used to interpolate the given information. Additionally a bigger time step is used to compute the far field responce. When both methods are coupled the time steps of each method have to be synchronized and the information interpolated.