气候变化领域集成服务门户(CCPortal): High-fidelity broadband prediction of regional seismic response: a hybrid coupling of physics-based synthetic simulation and empirical Green functions

CCPortal

DOI	10.1007/s11069-021-04766-x
	High-fidelity broadband prediction of regional seismic response: a hybrid coupling of physics-based synthetic simulation and empirical Green functions
	Castro-Cruz D.; Gatti F.; Lopez-Caballero F.
发表日期	2021
ISSN	0921030X
起始页码	1997
结束页码	2031
卷号	108 期号:2
英文摘要	The prediction of the seismic response of critical structures is highly sensitive to many aspects, among which the earthquake source and the geological setting are prominent. The related uncertainty issues must be taken into account in seismic risk mitigation studies, for example through the evaluation of several realizations of a future earthquake scenario. This aspect is crucial when addressing vulnerability studies at a regional scale. When opting for physical-based numerical simulations (PBS), however, the computational burden increases along with the expected degree of fidelity, making it difficult to evaluate more than a few dozens of alternatives. To cope with this disadvantage, in this work an alternative method is proposed, which exploits a rather low number of synthetic earthquake simulations and combines them with the empirical Green function (EGF) method, to finally generate thousands of alternative yet realistic seismic response of the site of interest. This hybrid strong motion predictions benefit of both (i) PBS high fidelity and (ii) data assimilation of strong ground motion records in the seismic area of interest, via EGF method, producing broadband synthetics at a relative cheap computational price. The power of the hybrid method is tested on a real case scenario, embodied by the ground-shaking prediction at the nuclear site of Cadarache, in the surroundings of the fault of Middle Durance, in South-Eastern France. Thousands of broadband (0–15 Hz) hybrid synthetic seismic response are generated, associated with different fault parameters (EGF method) and based upon a few key physics-based simulations, accurate up to 5 Hz. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
关键词	Earthquake simulation Empirical Green function Seismic hazard SEM3D, Hybrid method Spectral element method
英文关键词	computer simulation; data assimilation; earthquake prediction; empirical analysis; fault; Green function; seismic hazard; seismic response; spectral analysis; strong motion; France
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206140
作者单位	Laboratoire de Mécanique des Sols, Structures et Matériaux (MSSMat) UMR CNRS 8579, Université Paris Saclay, CentraleSupélec, CNRS, 8-10 rue Joliot Curie, Gif-sur-Yvette, 91190, France
推荐引用方式 GB/T 7714	Castro-Cruz D.,Gatti F.,Lopez-Caballero F.. High-fidelity broadband prediction of regional seismic response: a hybrid coupling of physics-based synthetic simulation and empirical Green functions[J],2021,108(2).
APA	Castro-Cruz D.,Gatti F.,&Lopez-Caballero F..(2021).High-fidelity broadband prediction of regional seismic response: a hybrid coupling of physics-based synthetic simulation and empirical Green functions.Natural Hazards,108(2).
MLA	Castro-Cruz D.,et al."High-fidelity broadband prediction of regional seismic response: a hybrid coupling of physics-based synthetic simulation and empirical Green functions".Natural Hazards 108.2(2021).