000015832 001__ 15832
000015832 005__ 20161115135331.0
000015832 04107 $$aeng
000015832 046__ $$k2013-06-12
000015832 100__ $$aMorga, M.
000015832 24500 $$aFinite Element Model Updating of a Real Structure Based on a Multi-Objective Optimization Approach

000015832 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015832 260__ $$bNational Technical University of Athens, 2013
000015832 506__ $$arestricted
000015832 520__ $$2eng$$aThe 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.

000015832 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015832 653__ $$a

000015832 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015832 720__ $$aMorga, M.
000015832 8560_ $$ffischerc@itam.cas.cz
000015832 8564_ $$s43929$$uhttps://invenio.itam.cas.cz/record/15832/files/1530.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-RS 27 SOFT COMPUTING APPLICATIONS
.
000015832 962__ $$r15525
000015832 980__ $$aPAPER