000019458 001__ 19458
000019458 005__ 20170118182319.0
000019458 04107 $$aeng
000019458 046__ $$k2017-01-09
000019458 100__ $$aKaloni, Smita
000019458 24500 $$aDamage  Detection in a Structural System Via Blind Source Separation

000019458 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019458 260__ $$b
000019458 506__ $$arestricted
000019458 520__ $$2eng$$aA technique for vibration based system identification for detection of earthquake induced damage in structural systems is discussed. A numerical case study of detection of damage in a building frame subjected to a strong earthquake is presented for the application of a blind source separation algorithm to the problem of output only modal identification. The problem of base-excitation, as in earthquake loading, presents a situation wherein the governing equation of motion is usually formulated in terms of the deformations relative to the base motion whereas the response recordings are of absolute acceleration. The conditions under which the blind source separation formulation of representing observed system response as a mixture of independent sources can be adapted for the case of base excited systems are discussed. The modal parameters (mode shapes, natural frequencies,) are extracted from the vibration response and the changes in the identified modal parameters are tracked in time through a moving time-window analysis. The implications of the assumptions in the formulation and their validity in practical problems is also discussed.

000019458 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019458 653__ $$aStructural Health Monitoring (SHM); Blind Source Separation (BSS); Second Order Blind Identification (SOBI).

000019458 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019458 720__ $$aKaloni, Smita$$iShrikhande, Manish
000019458 8560_ $$ffischerc@itam.cas.cz
000019458 8564_ $$s574645$$uhttps://invenio.itam.cas.cz/record/19458/files/3673.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3673.
000019458 962__ $$r16048
000019458 980__ $$aPAPER