000013287 001__ 13287
000013287 005__ 20161114160335.0
000013287 04107 $$aeng
000013287 046__ $$k2009-06-22
000013287 100__ $$aMoustafa, A.
000013287 24500 $$aBond graph-based qualitative-quantitative health assessment of structures

000013287 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013287 260__ $$bNational Technical University of Athens, 2009
000013287 506__ $$arestricted
000013287 520__ $$2eng$$aThis paper develops a new framework for hybrid qualitative-quantitative system identification of structures using the bond graph theory. The bond graph (BG) is an energybased graphical-modeling tool for physical dynamic systems and sensors. BG provides a unified (domain-independent) framework for modeling complex systems with interaction of multiple energy domains. Discrete structures are modeled using one-to-one bond graph elements. Continuous structures are modeled, in the generalized coordinates, using finite-mode bond graphs. BG facilitates the construction of temporal causal graph (TCG) that links the system response to the damaged component or faulty sensor, which constitutes the basis for a new health assessment scheme. TCG provides qualitative damage isolation by comparing predicted signatures of possible damage causes, extracted off-line before sensor data collection, with the observed behavior of the structure. This leads to quick isolation of damage and significant reductions in computations. Quantitative identification of damage size is performed by analyzing the substructure containing the damaged component only, again reducing the computations. Numerical illustrations on dynamic analysis and system identification of fifteen-story shear building and high-rise building are provided.

000013287 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013287 653__ $$aBond Graphs, Damage Detection, System Identification, Health Assessment, Sensor Faults, Damage Signature. Abstract. This paper develops a new framework for hybrid qualitative-quantitative system identification of structures using the bond graph theory. The bond graph (BG) is an energybased graphical-modeling tool for physical dynamic systems and sensors. BG provides a unified (domain-independent) framework for modeling complex systems with interaction of multiple energy domains. Discrete structures are modeled using one-to-one bond graph elements. Continuous structures are modeled, in the generalized coordinates, using finite-mode bond graphs. BG facilitates the construction of temporal causal graph (TCG) that links the system response to the damaged component or faulty sensor, which constitutes the basis for a new health assessment scheme. TCG provides qualitative damage isolation by comparing predicted signatures of possible damage causes, extracted off-line before sensor data collection, with the observed behavior of the structure. This leads to quick isolation of damage and significant reductions in computations. Quantitative identification of damage size is performed by analyzing the substructure containing the damaged component only, again reducing the computations. Numerical illustrations on dynamic analysis and system identification of fifteen-story shear building and high-rise building are provided.

000013287 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013287 720__ $$aMoustafa, A.$$iMahadevan, S.$$iTakewaki, I.
000013287 8560_ $$ffischerc@itam.cas.cz
000013287 8564_ $$s294784$$uhttps://invenio.itam.cas.cz/record/13287/files/CD427.pdf$$yOriginal version of the author's contribution as presented on CD, section: Identification methods in structural dynamics - ii (MS).
000013287 962__ $$r13074
000013287 980__ $$aPAPER