000013657 001__ 13657
000013657 005__ 20161114170126.0
000013657 04107 $$aeng
000013657 046__ $$k2011-05-25
000013657 100__ $$aBetti, M.
000013657 24500 $$aDamage Identification for a Reduced Scale Spatial Steel Frame

000013657 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013657 260__ $$bNational Technical University of Athens, 2011
000013657 506__ $$arestricted
000013657 520__ $$2eng$$aThis paper reports on an experiment carried out in the laboratory of Civil and Environmental Engineering of the University of Florence, where a reduced scale (approximately 2.5 m width × 2.5 m depth × 4.8 m height), three storey steel spatial frame was instrumented and progressively damaged by cutting one of its pillars just above the foundation; the deepness of the cut could be measured and was taken as the entity of the damage. A series of 12 accelerometers was installed on the frame and 3 more accelerometers were installed on the ground; acceleration measurements induced by ambient vibrations were recorded as the frame was progressively damaged. Acceleration signals were subsequently analyzed in both time and frequency domain (SSI, EFDD, neural networks): a frequency shift and a change in the corresponding modal shapes were observed as the damage increased. The damaged truss was also modelled by means of a FEM code and the frequency shift and the change in the modal shapes were reproduced. A genetic algorithm approach is currently being tested to try and indentify the location and entity of the damage, and is reported on.

000013657 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013657 653__ $$aSteel-Frame Structures, Damage Identification, Health Monitoring, Stochastic Subspace Identification.

000013657 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013657 720__ $$aBetti, M.$$iBiagini, P.$$iFacchini, L.
000013657 8560_ $$ffischerc@itam.cas.cz
000013657 8564_ $$s1296168$$uhttp://invenio.itam.cas.cz/record/13657/files/449.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 31 Uncertainty and Reliability in Computational Structural Dynamics.
000013657 962__ $$r13401
000013657 980__ $$aPAPER