000015627 001__ 15627
000015627 005__ 20161115135325.0
000015627 04107 $$aeng
000015627 046__ $$k2013-06-12
000015627 100__ $$aCasciati, F.
000015627 24500 $$aEstimating Thermal Inertia and Temperature Distribution Consistent With Monitored Data From a Railway Bridge

000015627 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015627 260__ $$bNational Technical University of Athens, 2013
000015627 506__ $$arestricted
000015627 520__ $$2eng$$aThis paper proposes a sequence of analyses allowing the designer to quantify the changes in the structural response due to the temperature variation. This is illustrated for a case study on a railway bridge. The SHM (Structural Health Monitoring) system installed on the bridge consists of Fiber Bragg Grating (FBG) sensors. A numerical model of the bridge was created. The plot of the daily variation of the vertical displacement of a node, when numerically computed for a temperature field interpolating the readings of the temperature sensors, shows a curve similar to the recorded history plot, but the latter one is delayed. This delay is due to both the thermal inertia of the deck, the reinforced concrete of the superstructure, and the actual temperature distribution across and along the deck. Thus, a refined study of the temperature time histories was conducted by a suitable thermo-mechanical model driven by the temperatures measured at the sensor locations. The obtained field of temperature is then used as input for a stress-strain analysis. The resulting displacements are eventually compared with the measured values. Using a first set of data, the numerical model parameters are calibrated, while a second set of data is used for a validation of the whole procedure.

000015627 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015627 653__ $$a, FBG sensors, Monitoring, Railways Bridge, Temperature.

000015627 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015627 720__ $$aCasciati, F.$$iCasciati, S.$$iFaravelli, L.$$iBortoluzzi, D.$$iMesservey, T.
000015627 8560_ $$ffischerc@itam.cas.cz
000015627 8564_ $$s448763$$uhttps://invenio.itam.cas.cz/record/15627/files/1169.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 19 IDENTIFICATION METHODS IN STRUCTURAL DYNAMICS
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000015627 962__ $$r15525
000015627 980__ $$aPAPER