English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Testing Nonlinear Amplification Factors of Ground-Motion Models

Loviknes, K., Kotha, S. R., Cotton, F., Schorlemmer, D. (2021): Testing Nonlinear Amplification Factors of Ground-Motion Models. - Bulletin of the Seismological Society of America, 111, 4, 2121-2137.
https://doi.org/10.1785/0120200386

Item is

Basic

show hide
Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007235 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007235_2
Genre: Journal Article

Files

show Files
hide Files
:
5007235.pdf (Postprint), 3MB
 
File Permalink:
-
Name:
5007235.pdf
Description:
-
Visibility:
Private (embargoed till 2022-06-29)
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Loviknes, Karina1, Author              
Kotha, Sreeram Reddy2, Author
Cotton, Fabrice1, Author              
Schorlemmer, Danijel1, Author              
Affiliations:
12.6 Seismic Hazard and Risk Dynamics, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146032              
2External Organizations, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: We explore nonlinear site effects in the new Japanese ground-motion dataset compiled by Bahrampouri et al. (2020). Following the approach of Seyhan and Stewart (2014), we evaluate the decrease of soil amplification according to the increasing and corresponding ground motion on surface rock (VS30 760 m=s). To better predict the rock ground motion associated with each record, we take into account the between-event variability of the ground motion, and to better evaluate the impact of nonlinearity, we correct observed ground motion on soil by the site-specific linear amplification. Instead of grouping the stations by site-response proxy, we focus on individual stations with several strong-motion records. We develop a framework to test recently published nonlinear site amplification models against a linear site amplification model and compare the results with recent building codes that include nonlinearity. The results show that the site response varies greatly from site to site, indicating that conventional site proxies, such as VS30, are not sufficient to characterize nonlinear site response. Out of all of the Kiban–Kyoshin network stations, 20 stations are selected as having recorded sufficient data to be used in the test. Out of these 20 stations, five stations show signs of nonlinearity, that is, the nonlinear models performed better than the linear-amplification model for all periods T. For most sites, however, the linear site amplification models get the best score. This suggest that, for the range of predicted rock motion considered in this study (peak ground acceleration <0:2g), nonlinearity may not have a sufficiently large impact on soil ground motion to justify the use of nonlinear site terms in ground-motion functional forms and seismic building codes for such moderate-level shaking.

Details

show
hide
Language(s): eng - English
 Dates: 2021-06-292021
 Publication Status: Finally published
 Pages: 17
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1785/0120200386
GFZPOF: p4 T3 Restless Earth
OATYPE: Green Open Access
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Bulletin of the Seismological Society of America
Source Genre: Journal, SCI, Scopus
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 111 (4) Sequence Number: - Start / End Page: 2121 - 2137 Identifier: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals59
Publisher: Seismological Society of America (SSA)