Effect of uncertainty in \[V_{\mathrm{S}}{-}N\] correlations on seismic site response analysis

This paper studies the reliability of the calculated shear-wave velocity (\[V_{\mathrm{S}}\]) from different available \[V_{\mathrm{S}}\] and SPT-N correlations in terms of seismic site response analysis. In the present study, various \[V_{\mathrm{S}}\]–N correlations developed for different regions...

Full description

Saved in:
Bibliographic Details
Published inJournal of Earth System Science Vol. 127; no. 7; pp. 1 - 21
Main Authors Narayan, Roy, Shiuly, Amit, Sahu, R B, Jakka, Ravi S
Format Journal Article
LanguageEnglish
Published Bangalore Springer Nature B.V 01.10.2018
Subjects
Computer simulation
Correlation
Correlation analysis
Geological hazards
Ground motion
Hazard assessment
Mathematical analysis
Monte Carlo simulation
Profiles
Reliability analysis
Response analysis
Seismic analysis
Seismic hazard
Seismic response
Seismic velocities
Soil
Soil types
Statistical methods
Wave velocity
Online AccessGet full text

Cover

More Information
Summary:This paper studies the reliability of the calculated shear-wave velocity (\[V_{\mathrm{S}}\]) from different available \[V_{\mathrm{S}}\] and SPT-N correlations in terms of seismic site response analysis. In the present study, various \[V_{\mathrm{S}}\]–N correlations developed for different regions around the globe have been used to calculate the bound of \[V_{\mathrm{S}}\] variations with depth at three different sites in Kolkata city. This bound has later been used to generate the random \[V_{\mathrm{S}}\] profiles using the Monte Carlo simulation. Equivalent linear site response analysis has been performed to study the response of those generated profiles under different input motion excitations. Strong-to-weak ground motion records have been used for this purpose. The amplification spectra of the generated \[V_{\mathrm{S}}\] profiles using all soil types and specific soil-type \[V_{\mathrm{S}}\]–N correlations show significant variations. The study also shows that the \[V_{\mathrm{S}}\]–N correlation may result in quite different \[V_{\mathrm{S},30}\] values and subsequently it may lead to the different site classes according to the NEHRP 2003 classification. So, the random choice of the \[V_{\mathrm{S}}\]–N correlation, where the direct measurement of \[V_{\mathrm{S}}\] is not available, may affect the outcome of seismic hazard analysis significantly. The study points out the need for accurate estimation of the \[V_{\mathrm{S}}\] profile either from in-situ determination or using site-specific correlation.
ISSN:0253-4126
0973-774X
DOI:10.1007/s12040-018-1007-3