Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

Earthquake activities in the many parts of world had shown the importance of local soil condition in the propagated wave motion. In this paper an attempt has been made to estimate site effects of deep soil column in Lucknow, Indo-Gangetic basin for scenario earthquakes at Himalayan plate boundary. Based on previous study, the synthetic ground motion has been generated using Stochastic Finite Fault model (FINSIM) for two scenario earthquakes at seismic gaps. One seismic gap called as western location/seismic gap is located about 307.88km from site and gives the peak ground acceleration of 0.11g at site. Another one is the Central seismic gap/location is located in central seismic gap at 229.77km from the site and gives the Peak Ground Acceleration (PGA) of 0.218g. The local soil layer details with standard penetration test N value have been collected for the main location in Lucknow from literates. The general soil found for this site is silty sand and silty clays having SPT N value up to above 100 up to a depth of 30m. The soil details extrapolated up to 100m by assuming linear variation from 30 m. The site response analysis has been carried out using equivalent linear and non linear approaches by employing SHAKE 2000 and Deep soil program. Input has been assigned at 30m 50, 75 and 100m to find effective depth of input motion. This study shows that the ground motions are being amplified within a depth of 50 to 80 m, but these results need to be further confirmed with large number of data. The input ground motions are amplified 1.06 to 2.5 times due to the soil condition.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Site Response Study of Deep Soil Column in Lucknow, India

San Diego, California

Earthquake activities in the many parts of world had shown the importance of local soil condition in the propagated wave motion. In this paper an attempt has been made to estimate site effects of deep soil column in Lucknow, Indo-Gangetic basin for scenario earthquakes at Himalayan plate boundary. Based on previous study, the synthetic ground motion has been generated using Stochastic Finite Fault model (FINSIM) for two scenario earthquakes at seismic gaps. One seismic gap called as western location/seismic gap is located about 307.88km from site and gives the peak ground acceleration of 0.11g at site. Another one is the Central seismic gap/location is located in central seismic gap at 229.77km from the site and gives the Peak Ground Acceleration (PGA) of 0.218g. The local soil layer details with standard penetration test N value have been collected for the main location in Lucknow from literates. The general soil found for this site is silty sand and silty clays having SPT N value up to above 100 up to a depth of 30m. The soil details extrapolated up to 100m by assuming linear variation from 30 m. The site response analysis has been carried out using equivalent linear and non linear approaches by employing SHAKE 2000 and Deep soil program. Input has been assigned at 30m 50, 75 and 100m to find effective depth of input motion. This study shows that the ground motions are being amplified within a depth of 50 to 80 m, but these results need to be further confirmed with large number of data. The input ground motions are amplified 1.06 to 2.5 times due to the soil condition.