Abstract
The assessment of the seismic vulnerability of the structures is important to define the seismic risk of
an area and to plan actions to mitigate the risk. An accurate assessment of the structural seismic
vulnerability is firstly based on a model that describes faithfully the real structure. The definition of
such model is a hard task, in spite of the computational resources that are nowadays available. Indeed,
the real values of some characteristics of the existing structures, the boundary conditions and the
loads are unknown and generate uncertainty in the numerical model [1] reducing the quality of results
of the seismic analyses. Further, the structural characteristics and the boundary conditions can change
during the life time of the structures, so the numerical model has to be modified regarding to the real
current state of the structure. In order to overcome the difficulty to define an accurate FEM, field test
data are used to update it. Several indirect methods were proposed in literature to update a FEM [1],
but only few of them were applied to a model of a real structure. This kind of model updating
methods is formulated as an optimization problem. The single objective optimization approach is the
most commonly used in literature, but some scholars have already highlighted its limits [2, 3].
This paper uses an approach based on the Multi-Objective optimization using Genetic Algorithm [5]
to update a FEM of a real masonry building located in Vienna and built at the beginning of the
previous century. This FEM updating approach reduces the difference between the analytical and
experimental modal characteristics of the buildings. The analytical modal characteristics are obtained
from FEM analyses, while the experimental ones are calculated from the results of forced vibration
tests [4]. A sensitivity analysis of the model parameters to variation of the modal characteristics is
carried out. This analysis guides the selection of the parameters and the formulation of the objective
functions of the optimization problem.
Originalsprache | Englisch |
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Titel | COMPDYN 2013 - 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering |
Seitenumfang | 1 |
Publikationsstatus | Veröffentlicht - 2013 |
Veranstaltung | COMPDYN 2013 - 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering - Dauer: 12 Juni 2013 → 14 Juni 2013 |
Konferenz
Konferenz | COMPDYN 2013 - 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering |
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Zeitraum | 12/06/13 → 14/06/13 |
Research Field
- Ehemaliges Research Field - Mobility Systems