Maximum Credible Earthquake Ground Motions with Focus on Site Amplification due to Deep Subsurface
Open Access
- 11 April 2021
- journal article
- research article
- Published by Engineering, Technology & Applied Science Research in Engineering, Technology & Applied Science Research
- Vol. 11 (2), 6873-6881
- https://doi.org/10.48084/etasr.3991
Abstract
Since an Earthquake Ground Motion (EGM) is amplified from the propagation through the ground, different models are required for each ground type in the seismic design of structures. While the shallow subsurface indicators are used for the classification of ground types, a deep subsurface has a significant impact on the amplification of the EGMs. This study discusses the maximum credible EGMs for seismic design reflecting seismic amplification due to deep subsurface. The design spectra, reflecting the site amplification factor of the target location, are presented by the calculation of the EGMs with the same source and path characteristics and different site amplification factors as recent major Japanese earthquake records have shown, from the perspective of establishing the maximum credible EGMs that may occur in the future at a target site. The present design spectra, which are based on the natural period of a shallow subsurface, are compared with those based on the site amplification factors, considering the effect of deep subsurfaces. Although there are almost no differences in the design spectra with the present design methods according to the surface ground type, the proposed method provides significantly different design spectra for each site amplification factor.Keywords
This publication has 12 references indexed in Scilit:
- Source- and Site-Specific Earthquake Ground MotionsEngineering, Technology & Applied Science Research, 2020
- Seismic Amplification by Deep Subsurface and Proposal of a New ProxyEngineering, Technology & Applied Science Research, 2020
- Objective Determination of Source Parameters and Similarity of Earthquakes of Different SizePublished by Wiley ,2013
- Regional Correlations of VS30 and Velocities Averaged Over Depths Less Than and Greater Than 30 MetersBulletin of the Seismological Society of America, 2011
- Comparison of Site-Effects Estimation Methods Using the Lefkas, Greece, 2003 Earthquake AftershocksBulletin of the Seismological Society of America, 2008
- Estimating Absolute Site EffectsBulletin of the Seismological Society of America, 2004
- Comparison of Different Site Response Estimation Techniques Using Aftershocks of the 1999 Izmit EarthquakeBulletin of the Seismological Society of America, 2004
- Equivalent linear method considering frequency dependent characteristics of stiffness and dampingSoil Dynamics and Earthquake Engineering, 2002
- Kyoshin Net (K-NET)Seismological Research Letters, 1998
- Source parameters of the 1983 Japan Sea earthquake sequence.Journal of Physics of the Earth, 1988