000019440 001__ 19440
000019440 005__ 20170118182318.0
000019440 04107 $$aeng
000019440 046__ $$k2017-01-09
000019440 100__ $$aVentura, Carlos
000019440 24500 $$aModel Updating and Seismic Analysis of a Large Cable-Stayed Bridge

000019440 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019440 260__ $$b
000019440 506__ $$arestricted
000019440 520__ $$2eng$$aModel updating serves the purpose of providing a more representative finite element model of a structure. Engineers and researchers need a tuned model for many applications such as damage detection, structural modification assessments, or seismic assessments. It is very common for experimental results to contradict the results taken from a computer model, which demonstrates a need for having a properly calibrated model. In this paper, a model of a three-span cable-stayed bridge is updated using an ongoing structural health monitoring network, and a linear time history analysis is carried out to compare results before and after updating. A finite element model is created based on design drawings, and both manual and automatic updating methods are applied. First, the loading on the deck is manually calibrated to reasonably agree with experimental results; and second, important parameters are identified based on a sensitivity analysis, and then the model is manually updated to closely match the frequencies and mode shapes of the experimental results. Special attention is also paid to the boundary conditions at the ends of the bridge and at each tower, as well as the stiffnesses at the foundations. In order to provide a comparison between the original and updated models, a suite of nine scaled ground motions are selected for a time history analysis. Three crustal, three subcrustal, and three subduction earthquake motions are selected for the analysis. Observations from the seismic analysis reveal the importance of having a more confident, calibrated finite element model.

000019440 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019440 653__ $$aModel updating; Ambient vibration testing; Linear time history analysis; Cabled-stayed bridge

000019440 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019440 720__ $$aVentura, Carlos$$iMcdonald, Steven
000019440 8560_ $$ffischerc@itam.cas.cz
000019440 8564_ $$s586520$$uhttps://invenio.itam.cas.cz/record/19440/files/3628.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3628.
000019440 962__ $$r16048
000019440 980__ $$aPAPER