The motivation for this work is to model the seismic response of a structure taking into account the base three Earth components (seismic source, wave path and local soil profile) plus the engineering structure at the end of the line and modelling all of them in one system. The main aim is to develop an efficient hybrid hi-performance methodology and software that model the dynamic response of structures during earthquake accounting for the main characteristics and mechanical properties of the soil and seismic source, plus the specific structural peculiarities and mechanical behavior of the building/underground structure. The present study investigates the soil-foundation-structure interaction and the influence of the structural dynamics over the whole system’s motion. The boundary integral equation method (BIEM) is applied to model the semi-infinite part of the geological domain, while the finite soil profile is described via finite element method (FEM). The structural dynamics is simulated using finite elements in absolute coordinates (FEAC), which allows the geometrical nonlinearity in dynamic behavior of the engineering structure to be taken into account. Example of forced motion of the rigid foundation as a result of wave propagation overlapped by a four stroke structural displacements illustrates the efficiency of the hybrid model.
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Seismic Response of Soil-Structure Systems via BIEM and FEM in Absolute Coordinates
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