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Estimation of High frequency Decay Factor to Simulate Earthquake Ground Motion for Indo-Gangetic Plain

Estimation of High frequency Decay Factor to Simulate Earthquake Ground Motion for Indo-Gangetic... The high frequency decay parameter is attenuation of seismic wave from source to site at higher frequency, and it is represented by kappa (κ). This kappa with respect to the distance gives a high frequency decay factor called kappa factor (κ0) which indicates the seismic activity. The kappa factor of Indo-Gangetic Plain has been obtained from the available strong ground motion accelerogram data. The high frequency decay parameter kappa on log linear Fourier Amplitude Spectrum (FAS) has been used to estimate the kappa factor. This kappa factor is used to simulate the earthquake ground motion parameters (like PGA and Response Spectrum) for a particular location, with the help of these parameters design of earthquake resistant building can be performed and also seismic hazard map could prepare. The kappa parameter has been derived for the North West Indo-Gangetic Plain (NW IGP) for the data available up to 150 km of earthquake magnitude Mw 3.1–5.8 and South East Indo-Gangetic Plain (SE IGP) from the distance of 50–551 km of earthquake magnitude Mw 4.0–Mw 6.8. In NW IGP, only Intra earthquake events are used, and for the SW IGP along with Intra events, Inter earthquake events are also used. The kappa factor has been calculated for the horizontal components of earthquake events. The kappa factor which is used in simulation models obtained from the high frequency decay parameter kappa are 0.043 s and 0.036 s for NW IGP and SE IGP, respectively. This factor is near to the previous studies of nearer regions of Indo-Gangetic pain (for Indian region, it is 0.04). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of The Institution of Engineers (India):Series A Springer Journals

Estimation of High frequency Decay Factor to Simulate Earthquake Ground Motion for Indo-Gangetic Plain

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Publisher
Springer Journals
Copyright
Copyright © The Institution of Engineers (India) 2021
ISSN
2250-2149
eISSN
2250-2157
DOI
10.1007/s40030-021-00601-5
Publisher site
See Article on Publisher Site

Abstract

The high frequency decay parameter is attenuation of seismic wave from source to site at higher frequency, and it is represented by kappa (κ). This kappa with respect to the distance gives a high frequency decay factor called kappa factor (κ0) which indicates the seismic activity. The kappa factor of Indo-Gangetic Plain has been obtained from the available strong ground motion accelerogram data. The high frequency decay parameter kappa on log linear Fourier Amplitude Spectrum (FAS) has been used to estimate the kappa factor. This kappa factor is used to simulate the earthquake ground motion parameters (like PGA and Response Spectrum) for a particular location, with the help of these parameters design of earthquake resistant building can be performed and also seismic hazard map could prepare. The kappa parameter has been derived for the North West Indo-Gangetic Plain (NW IGP) for the data available up to 150 km of earthquake magnitude Mw 3.1–5.8 and South East Indo-Gangetic Plain (SE IGP) from the distance of 50–551 km of earthquake magnitude Mw 4.0–Mw 6.8. In NW IGP, only Intra earthquake events are used, and for the SW IGP along with Intra events, Inter earthquake events are also used. The kappa factor has been calculated for the horizontal components of earthquake events. The kappa factor which is used in simulation models obtained from the high frequency decay parameter kappa are 0.043 s and 0.036 s for NW IGP and SE IGP, respectively. This factor is near to the previous studies of nearer regions of Indo-Gangetic pain (for Indian region, it is 0.04).

Journal

Journal of The Institution of Engineers (India):Series ASpringer Journals

Published: Mar 1, 2022

Keywords: Seismic waves; Fourier amplitude spectra; Fault; Kappa factor

References