000019464 001__ 19464
000019464 005__ 20170118182319.0
000019464 04107 $$aeng
000019464 046__ $$k2017-01-09
000019464 100__ $$aKawase, Hiroshi
000019464 24500 $$aEstimation of Horizontal Seismic Bedrock Motion From Vertical Surface Motion Based on Horizontal-To-Vertical Spectral Ratios of Earthquake Motions

000019464 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019464 260__ $$b
000019464 506__ $$arestricted
000019464 520__ $$2eng$$aEstimating bedrock motion is a popular method to understand the amplification characteristics of the observation site and investigate strong ground motion characteristics without any site effects. We calculated average Horizontal-to-Vertical spectral ratios of weak motions and identify the subsurface structure as a ratio of transfer functions of horizontal and vertical components based on the diffuse field theory. Then, we attempted to estimate the horizontal seismic bedrock motions of weak motions and strong motions using the proposed method and compared with results from the equivalent linear analysis for non-linear soil response. For the weak motions, the bedrock spectra and the bedrock motions estimated by both analyses were consistent. The estimated bedrock spectra of strong motions were similar, but the bedrock waveform estimated by the equivalent linear analysis at MYG006 was larger than the one estimated by the proposed method. The cause of this larger amplitude was the excessive amplitude reduction of the transfer function that is used to divide the surface spectrum in order to get the bedrock spectrum. Except for that case, the results of the proposed method basically corresponds to the previous methods, and so we have shown here a new possibility of the application of the diffuse field theory.

000019464 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019464 653__ $$aHorizontal-to-Vertical spectral ratio, seismic bedrock motion, diffuse field theory

000019464 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019464 720__ $$aKawase, Hiroshi$$iMatsushima, Shinichi$$iNagashima, Fumiaki
000019464 8560_ $$ffischerc@itam.cas.cz
000019464 8564_ $$s1540612$$uhttps://invenio.itam.cas.cz/record/19464/files/3685.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3685.
000019464 962__ $$r16048
000019464 980__ $$aPAPER