000012862 001__ 12862
000012862 005__ 20160920162651.0
000012862 04107 $$aeng
000012862 046__ $$k2016-09-05
000012862 100__ $$aAdewuyi, A.P.
000012862 24500 $$aEvaluation of flexibility-based damage indices using different modal response data

000012862 24630 $$n6.$$pInsights and Innovations in Structural Engineering, Mechanics and Computation
000012862 260__ $$bTaylor and Francis Group, London, UK
000012862 506__ $$arestricted
000012862 520__ $$2eng$$aModal flexibility is a robust and promising damage index for large civil engineering structures where only a few fundamental modes are measurable. Flexibility matrix of a structural system can be reliably obtained from a truncated set of lower modal parameters with sufficient accuracy. Unfortunately, the conventional flexibility methods based on displacement mode shapes are still unable to provide the required accuracy and reliability for damage localization due to their low sensitivity to small and multiple damages, and high sensitivity to measurement noise. In most cases, the modal para­meters of the structures in the healthy state are required as baseline. Hence, alternative dynamic parameters such as rotational and strain mode shape measurements have been recently explored for better damage identification. This paper presents modified flexibility-based damage indices using rotation and modal macro-strain data from fiber-optic sensors. The uniqueness of modal macro-strain flexibility, rotational flexibility, and the conventional (displacement based) is first established. Finally, the performance and sensitivity of the flexibility indices based on the three measurement data are comparatively investigated for localization of realistic small-to-moderate damage cases when baseline of the structure in the intact state is not available.

000012862 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012862 653__ $$a

000012862 7112_ $$aSixth International Conference on Structural Engineering, Mechanics and Computation$$cCape Town, South Africa$$d2016-09-05 / 2016-09-07$$gSEMC2016
000012862 720__ $$aAdewuyi, A.P.$$iFranklin, S.O.$$iWu, Z.S.
000012862 8560_ $$ffischerc@itam.cas.cz
000012862 8564_ $$s1990869$$uhttp://invenio.itam.cas.cz/record/12862/files/310.pdf$$yOriginal version of the author's contribution as presented on CD, 310.pdf.
000012862 962__ $$r12552
000012862 980__ $$aPAPER