Broadband Strong Ground Motion Modeling Using Planar Dynamic Rupture With Fractal Parameters
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10473648" target="_blank" >RIV/00216208:11320/23:10473648 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=zsjf0Ui.aw" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=zsjf0Ui.aw</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2023JB026506" target="_blank" >10.1029/2023JB026506</a>
Alternative languages
Result language
angličtina
Original language name
Broadband Strong Ground Motion Modeling Using Planar Dynamic Rupture With Fractal Parameters
Original language description
Dynamic rupture modeling represents a promising physics-based approach to strong ground motion simulations. However, its application in a broad frequency range (0-10 Hz), interesting for engineering studies, is challenging. The main reason is that widely used and relatively simple planar fault models with smooth distributions of initial stress and frictional parameters, or even self-similar initial stress, result in ground motions depleted in high-frequency content. Here we propose an efficient approach for the linear slip-weakening friction model on a planar fault based on the Ide and Aochi (2005, ) multiscale model with a small-scale random fractal distribution of the slip-weakening distance D-c. We propose a way to combine these variations with a large-scale deterministic dynamic model. We illustrate the approach on an elliptical model and a smooth model of the 2016 M-w 6.2 Amatrice, Italy, earthquake from low-frequency dynamic rupture inversion. To intensify the incoherence of the rupture propagation, we also include a variation of the strength and initial stress, both correlated with D-c. These additions result in sustained high-frequency radiation during the whole rupture propagation and omega-square source time functions. The new model of the Amatrice earthquake generates synthetics that agree with the local ground motion model up to 5 Hz in terms of spectral accelerations while preserving the average and integral dynamic rupture parameters (e.g., stress drop, fracture and radiated energy). The fractal dynamic model can be easily implemented in any dynamic rupture propagation code and is thus readily applicable in broadband physics-based ground motion predictions for earthquake scenarios in seismic hazard assessment.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
<a href="/en/project/GA23-06345S" target="_blank" >GA23-06345S: Seismo-geodynamic modeling of the Hellenic subduction</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research: Solid Earth
ISSN
2169-9313
e-ISSN
2169-9356
Volume of the periodical
128
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
23
Pages from-to
e2023JB026506
UT code for WoS article
001000301500001
EID of the result in the Scopus database
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