000009453 001__ 9453
000009453 005__ 20141205150207.0
000009453 04107 $$aeng
000009453 046__ $$k2008-10-12
000009453 100__ $$aAviram, A.
000009453 24500 $$aEpistemic Uncertainty of Seismic Response Estimates for Reinforced Concrete Bridges

000009453 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009453 260__ $$b
000009453 506__ $$arestricted
000009453 520__ $$2eng$$aConsiderable effort has recently been directed toward developing analytical probabilistic seismic response estimates at different earthquake intensities. However, probability distributions of response quantities are sensitive to not only the randomness in the ground motion input, but also the assumptions made in the nonlinear finite element models used in the analyses. There are epistemic uncertainties inherent in selection of model parameters as well as the capabilities of individual analysis platforms themselves. This paper develops quantitative estimates of the epistemic uncertainty, above and beyond the aleatory variability, of typical reinforced concrete overpass bridge structures in California. A series of nonlinear time history analyses of 6 typical existing reinforced concrete bridge structures in California using 60 ground motions is carried out using SAP2000 and OpenSees finite element programs. The response of the bridges in terms of peak displacements at the column top is related to the intensity measure defined as the spectral displacement at the first mode period. A procedure using natural logarithmic regression is applied to the data to estimate the seismic response of the structure and the uncertainty in such estimation. Two methods of obtaining response estimate bias factors between the two programs are illustrated for the 6 bridges under three typical seismic hazard levels (2%-, 5%-, and 10%-in-50 year probabilities of exceedance).

000009453 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009453 653__ $$aepistemic uncertainty, reinforced concrete bridges, seismic response

000009453 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009453 720__ $$aAviram, A.$$iMackie, Kevin$$iStojadinovic, Bozidar
000009453 8560_ $$ffischerc@itam.cas.cz
000009453 8564_ $$s186119$$uhttps://invenio.itam.cas.cz/record/9453/files/05-02-0079.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-02-0079.
000009453 962__ $$r9324
000009453 980__ $$aPAPER