A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Variability in Kappa (κr): Contributions from the Computation Procedure
Kappa (κr), the high-frequency spectral decay parameter, has been gaining popularity in the engineering seismology field for more than forty years, but it was not until recently that κr has been used for geotechnical earthquake engineering applications. For instance, κr has been used in site-specific seismic hazard analysis and site response analysis. Values of κr capture high-frequency attenuation at short rupture distances. However, the high variability and uncertainty associated with its calculation has hindered its application more broadly in geotechnical engineering analyses. The uncertainties in κr may stem from either the poor understanding of the physics behind this parameter or the oversimplified computation procedure. Variability due to the computation procedure can be minimized with the implementation of a standardized and robust calculation process. In this work, we evaluate the variability in κr introduced during the calculation procedure by the selection of the frequency band and discuss potential causes for negative κr values. We note that the classic κr model may be an oversimplification of complex wave propagation phenomena, and the divergence between its assumptions and actual site conditions require further investigation.
Variability in Kappa (κr): Contributions from the Computation Procedure
Kappa (κr), the high-frequency spectral decay parameter, has been gaining popularity in the engineering seismology field for more than forty years, but it was not until recently that κr has been used for geotechnical earthquake engineering applications. For instance, κr has been used in site-specific seismic hazard analysis and site response analysis. Values of κr capture high-frequency attenuation at short rupture distances. However, the high variability and uncertainty associated with its calculation has hindered its application more broadly in geotechnical engineering analyses. The uncertainties in κr may stem from either the poor understanding of the physics behind this parameter or the oversimplified computation procedure. Variability due to the computation procedure can be minimized with the implementation of a standardized and robust calculation process. In this work, we evaluate the variability in κr introduced during the calculation procedure by the selection of the frequency band and discuss potential causes for negative κr values. We note that the classic κr model may be an oversimplification of complex wave propagation phenomena, and the divergence between its assumptions and actual site conditions require further investigation.
Variability in Kappa (κr): Contributions from the Computation Procedure
Ji, Chunyang (author) / Cabas, Ashly (author) / Bonilla, Fabian (author) / Gelis, Céline (author)
Geo-Congress 2022 ; 2022 ; Charlotte, North Carolina
Geo-Congress 2022 ; 370-379
2022-03-17
Conference paper
Electronic Resource
English
Variability in Kappa (κ~r): Contributions from the Computation Procedure
| British Library Conference Proceedings | 2022
Towards an Automated Kappa Measurement Procedure
| British Library Conference Proceedings | 2019
Variability in Kappa (κ~r) Estimated with Coda Waves for California
| British Library Conference Proceedings | 2022
Kappa( kappa ) from Records of Small Earthquakes in North China
| British Library Conference Proceedings | 2015