Validation of 3D Finite Element Models Through Seismic Tests at the Enea “Structural Dynamic and Vibration Control”Laboratory

Abstract eng:
A general approach to evaluate the seismic behaviour of structures by finite element analyses (FEA) and shaking table experiments is shown in this poster. The research activities at the FIM-MATQUAL laboratories of the C.R. Casaccia -Rome, Italy, are mainly devoted to numerical simulations and experimental analysis of innovative systems for the seismic isolation and retrofitting of civil, industrial, and historical buildings, together with the seismic tests of sub-structures and scaled mock-ups, in order to evaluate the isolation/dissipation performance of the anti-seismic devices, and the failure modes of the building’s structural parts. Before testing the structures, finite element stress-strain analyses is carried out to understand the dynamic behaviour and to define the best locations of the monitoring sensors such us accelerometers, strain-gage and LVDT. The material properties and load boundary conditions of the finite element models (FEM) are updated by the experimental results and the FE analyses have been re-executed to optimize the FE models ant to re-align them to the real structure. The system mode shapes and frequencies which come from the experimental data and the FEA are matched and compared. Moreover the numerical simulation of different reinforced techniques are obtained introducing in the original FE model new elements which are representative of typical reinforced structures. The shaking table tests can simulate the real stress fields in the structures due to the dynamic loads induced by wind, traffic and earthquakes.

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