Header menu link for other important links
X
Seismic hazard assessment of Chennai city considering local site effects
Published in
2008
Volume: 117
   
Issue: SUPPL.2
Pages: 853 - 863
Abstract
Chennai city suffered moderate tremors during the 2001 Bhuj and Pondicherry earthquakes and the 2004 Sumatra earthquake. After the Bhuj earthquake, Indian Standard IS: 1893 was revised and Chennai city was upgraded from zone II to zone III which leads to a substantial increase of the design ground motion parameters. Therefore, a comprehensive study is carried out to assess the seismic hazard of Chennai city based on a deterministic approach. The seismicity and seismotectonic details within a 100 km radius of the study area have been considered. The one-dimensional ground response analysis was carried out for 38 representative sites by the equivalent linear method using the SHAKE91 program to estimate the ground motion parameters considering the local site effects. The shear wave velocity profile was inferred from the corrected blow counts and it was verified with the Multichannel Analysis of Surface Wave (MASW) test performed for a representative site. The seismic hazard is represented in terms of characteristic site period and Spectral Acceleration Ratio (SAR) contours for the entire city. It is found that structures with low natural period undergo significant amplification mostly in the central and southern parts of Chennai city due to the presence of deep soil sites with clayey or sandy deposits and the remaining parts undergo marginal amplification. © Printed in India.
About the journal
JournalJournal of Earth System Science
ISSN02534126
Open AccessNo
Concepts (20)
  •  related image
    Amplification
  •  related image
    BHUJ EARTHQUAKE 2001
  •  related image
    Ground motion
  •  related image
    Hazard assessment
  •  related image
    MICROTREMOR
  •  related image
    One-dimensional modeling
  •  related image
    Parameterization
  •  related image
    S-wave
  •  related image
    Seismic hazard
  •  related image
    Seismicity
  •  related image
    SITE EFFECT
  •  related image
    SUMATRA EARTHQUAKE 2004
  •  related image
    Tectonic setting
  •  related image
    Wave velocity
  •  related image
    Asia
  •  related image
    CHENNAI
  •  related image
    Eurasia
  •  related image
    India
  •  related image
    South asia
  •  related image
    Tamil nadu