Comparing depth-to-bedrock and fundamental-frequencies as supplement proxies to vs30 in site response evaluation

A. Baram, R. Kamai, G. Yagoda-Biran

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Alternative proxies as supplemental to VS30 for site-response predictions in Israel are examined. We use a large database of local velocity profiles to compute the expected amplifications, due to the lack of empirical ground-motion measurements. Amplification is computed with respect to a new generic rock profile, defined as part of this study. We test the correlation of eight different site proxies with the computed amplification factors and show that the average shear-wave velocity (VS30 ) best describes amplification at short spectral periods, while some measure of depth is needed to also capture amplification at long spectral periods. We discuss optional depth proxies, including depth to a certain velocity (e.g. Z1100), as well as peak frequencies in the acceleration transfer function which are highly correlated with depth. The selected proxy must be a combination of high statistical correlation as well as applicability for the local engineering community.

Original languageEnglish
Title of host publicationEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions
Subtitle of host publicationProceedings of the 7th International Conference on Earthquake Geotechnical Engineering
EditorsFrancesco Silvestri, Nicola Moraci
PublisherCRC Press/Balkema
Pages1305-1311
Number of pages7
ISBN (Print)9780367143282
StatePublished - 1 Jan 2019
Event7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019 - Rome, Italy
Duration: 17 Jan 201920 Jan 2019

Conference

Conference7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019
Country/TerritoryItaly
CityRome
Period17/01/1920/01/19

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