000018246 001__ 18246
000018246 005__ 20170118182214.0
000018246 04107 $$aeng
000018246 046__ $$k2017-01-09
000018246 100__ $$aZamora, Luis
000018246 24500 $$aNumerical Model Updating of the Duoc-Uc Footbridge (Concepciã³n, Chile) Using Experimentally Extracted Data

000018246 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018246 260__ $$b
000018246 506__ $$arestricted
000018246 520__ $$2eng$$aCalibration of numerical models has become indispensable to reduce error in the prediction of structural performance of complex systems. Several methods have been developed in the last two decades to calibrate a numerical model, but the implementation of these procedures in engineering common practice is still infrequent. Hence, the analysis-verificationcalibration-design cycle is usually incomplete. In this study, a 52-m long footbridge located in Concepcion (Chile) was model using finite elements software. The footbridge consists of two 6.5 m high arches built of laminated timber. The main arch elements (curved beams) have a rectangular section of 1100 x 200 mm. A steel structure is attached to the curved beams, with columns spaced every 4 m. This steel structure supports a 100 mm thick timber slab with an 80 mm thick top layer of asphalt. An operational modal analysis was conducted to dynamically characterize the footbridge. Accelerometers were attached at different points on the footbridge and one-hour ambient tests were performed on different days and hour times. Stochastic Subspace Identification (SSI) and Frequency Domain Decomposition (FDD) were employed to determine the dynamic properties of the structure (modal frequencies, damping and mode shapes). The experimental results were compared with the modal response calculated by the numerical model. Results are discussed in terms of the similitude between experimental and theoretical response. Finally, a model updating procedure was proposed to improve numerical model predictions.

000018246 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018246 653__ $$aModal analysis, model updating, system identification.

000018246 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018246 720__ $$aZamora, Luis$$iPadilla, Javiera$$iOlivera, Juan Jose$$iVera, Claudio Oyarzo
000018246 8560_ $$ffischerc@itam.cas.cz
000018246 8564_ $$s698501$$uhttps://invenio.itam.cas.cz/record/18246/files/1097.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1097.
000018246 962__ $$r16048
000018246 980__ $$aPAPER