NDLI: Ground motion prediction equations for the Chilean subduction zone

Content Provider	Springer Nature Link
Author	Idini, Benjamín Rojas, Fabián Ruiz, Sergio Pastén, César
Copyright Year	2016
Abstract	The Chilean subduction zone is one of the most active in the world. Six events of magnitude greater than $$M_w = 7.5$$ have occurred in the last 10 years, including the 2010 $$M_w = 8.8$$ Maule, the 2014 $$M_w = 8.2$$ Iquique, and the 2015 $$M_w = 8.3$$ Illapel earthquakes. These events have produced a considerable dataset to study interface thrust and intraslab intermediate depth earthquakes. In this paper, we present a database of strong motion records for Chilean subduction zone earthquakes and develop a ground motion prediction equation (GMPE) for peak ground acceleration and response spectral accelerations with 5% damping ratio for periods between 0.01 and 10 s. The dynamic soil amplification effects are considered in a new empirical model based on two parameters, the predominant period of the soil ( $$T^*$$ ) and the average shear wave velocity down to 30 m depth ( $$V_{S30}$$ ). The spectral accelerations prediction equations at short periods are generated using 114 records of intraslab earthquakes ( $$M_w$$ = 5.5–7.8) and 369 records of interface earthquakes ( $$M_w$$ = 5.5–8.8); a reduced number of these records are used for longer periods. The proposed GMPE can predict the ground motion of large Chilean subduction earthquakes ( $$M_w > 8$$ ) with no need of extrapolation from small-magnitude earthquake data. Intraslab earthquakes show a steeper attenuation slope than that of interface ones, which is consistent with other GMPE results derived from worldwide subduction zones data. Moreover, the Chilean interface earthquakes show a flatter attenuation slope relative to the Japanese ones.
Starting Page	1853
Ending Page	1880
Page Count	28
File Format	PDF
ISSN	1570761X
Journal	Bulletin of Earthquake Engineering
Volume Number	15
Issue Number	5
e-ISSN	15731456
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-11-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ground motion prediction equations Chilean subduction zone Site effects Response spectra Geotechnical Engineering & Applied Earth Sciences Environmental Engineering/Biotechnology Civil Engineering Geophysics/Geodesy Hydrogeology Structural Geology
Content Type	Text
Resource Type	Article
Subject	Building and Construction Geophysics Geotechnical Engineering and Engineering Geology Civil and Structural Engineering

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