000013535 001__ 13535
000013535 005__ 20161114165845.0
000013535 04107 $$aeng
000013535 046__ $$k2011-05-25
000013535 100__ $$aCastro, R.
000013535 24500 $$aDamage Assessment of Hyperbolic Paraboloidal Shells Using Finite Element Updating

000013535 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013535 260__ $$bNational Technical University of Athens, 2011
000013535 506__ $$arestricted
000013535 520__ $$2eng$$aAssessment of the structural and functional integrity of civil engineering structures is an essential design issue and of continuous concern during the process of maintenance, repair and upgrading of such structures. The concept of Structural Health Monitoring (SHM) offers means to predict the structural behavior of a particular structure under operating conditions that differ from those taken into consideration in the initial design cycle. Employment of the aforementioned concept requires computational models that are verified, refined and adjusted with respect to actual measurements. In this paper, a finite element updating methodology is presented, which aims to reduce the discrepancies between the dynamic model parameters of the structure and the measurements. A sucessful finite element updating approach must rely on physically meaningful criteria for selecting the updating parameters and the most suitable method in order to modify the mass and stiffness matrices of the computational model. The proposed iterative method is based on a generalized variational principle, a modified version of the Hu-Washizu principle of elastodynamics, which treats displacements, rotations, strains and stresses as independent variables that can be treated as updating parameters. Thus, a more efficient and direct implementation of measurements is possible. Furthermore, the discretization yields simple and effective finite elements especially suited to repetitious computations required in dynamic finite element updating. Different parameter sensitivities are studied. Single and multi-objective optimization processes are carried out using objective functions that include the eigenfrequencies and the strain modal energy of the structure. Finally, some alternative damage scenarios are presented in order to validate the proposed formulation for the case of hyperbolic paraboloidal shell structures. 1

000013535 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013535 653__ $$aFinite Element Updating, Structural Damage, Structural Dynamics, Hyperbolic Paraboloidal Shells.

000013535 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013535 720__ $$aCastro, R.$$iTalaslidis, D.$$iGallego, R.$$iRus, G.
000013535 8560_ $$ffischerc@itam.cas.cz
000013535 8564_ $$s425974$$uhttp://invenio.itam.cas.cz/record/13535/files/251.pdf$$yOriginal version of the author's contribution as presented on CD, section: RS 05 FEM: Modelling and Simulation  .
000013535 962__ $$r13401
000013535 980__ $$aPAPER