000020013 001__ 20013
000020013 005__ 20170118182351.0
000020013 04107 $$aeng
000020013 046__ $$k2017-01-09
000020013 100__ $$aDosso, Stan E.
000020013 24500 $$aA Bernstein Polynomial Model in Bayesian Inversion of Surface-Wave Dispersion for Earthquake Site Response in British Columbia, Canada

000020013 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020013 260__ $$b
000020013 506__ $$arestricted
000020013 520__ $$2eng$$aKnowledge of near-surface properties of the soil column, in particular, the shear-wave velocity (Vs) profile over the upper 10s of meters, is important for characterizing the expected ground response to earthquake shaking at a specific site. Noninvasive and passive methods based on recording ambient seismic noise are increasingly popular for estimating Vs structure with minimal cost and site disruption. This paper applies a fully nonlinear Bayesian inversion methodology, based on parallel tempering, to estimate Vs profiles and uncertainties using surface-wave dispersion data processed from passive seismic array recordings. In the inversion, the Vs profile is parameterized using a Bernstein polynomial basis, which efficiently characterizes general depth-dependent Vs gradients in the soil column. Bernstein polynomials provide a stable parameterization in that small perturbations to the model parameters (basis function coefficients) result in only small perturbations to the Vs profile. Shear-wave velocity profiles and uncertainties are obtained from the velocity-depth marginal posterior probability density. This methodology is applied to passive seismic array recordings collected at several sites in Kitimat, British Columbia, Canada, a region where earthquake site response is of significant interest. The probabilistic Vs profile results ultimately provide probabilistic estimates of site response factors such as peak ground velocity/acceleration and Vs30.

000020013 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020013 653__ $$aBayesian Inversion; Passive Seismic Array; Surface-wave Dispersion, Seismic site assessment

000020013 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020013 720__ $$aDosso, Stan E.$$iCassidy, John F.$$iGosselin, Jeremy M.
000020013 8560_ $$ffischerc@itam.cas.cz
000020013 8564_ $$s643427$$uhttp://invenio.itam.cas.cz/record/20013/files/4940.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4940.
000020013 962__ $$r16048
000020013 980__ $$aPAPER