DOI: 10.1007/s11069-021-04766-x
论文题名: High-fidelity broadband prediction of regional seismic response: a hybrid coupling of physics-based synthetic simulation and empirical Green functions
作者: Castro-Cruz D. ; Gatti F. ; Lopez-Caballero F.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 108, 期: 2 起始页码: 1997
结束页码: 2031
语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168939
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Natural Hazards,2021-01-01,108(2)