Location
San Diego, California
Presentation Date
29 May 2010, 8:00 am - 9:30 am
Abstract
Site specific analysis was carried out for a deep stiff soil site located near Ahmedabad, India. The site predominantly consists of sandy clay and silty sand layer in the top 30m with Vs varying from 430 to 750m/s. It is followed by a high plastic stiff clay layer cemented with sand and gravel with unusually high Vs above 1000m/s. The study region surrounded by 13 major faults has experienced several major earthquakes including the disastrous Bhuj earthquake (Mw=7.7). The seismic hazard level at the site was estimated by deterministic approach and the East Cambay fault with Mw of 6.2 is found to be the controlling source capable of causing a surface PGA of 0.46g. 1D ground response analysis carried out using SHAKE 2000 and DEEPSOIL reveals an amplification of the ground with a surface PGA of 0.52g and 0.43g respectively. The design response spectrum obtained by RRS analysis was compared with several contemporary seismic design codes. It is found that the seismic provisions tend to under estimate the spectral acceleration by about 30% at mid period range. The maximum spectral acceleration compares well with those observed at similar deep stiff soil sites at Los Angeles reported by Chang et al (1997).
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Kumar, S. Krishna and Boominathan, A., "Site Specific Seismic Analysis of a Deep Stiff Soil Site" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 12.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session03b/12
Included in
Site Specific Seismic Analysis of a Deep Stiff Soil Site
San Diego, California
Site specific analysis was carried out for a deep stiff soil site located near Ahmedabad, India. The site predominantly consists of sandy clay and silty sand layer in the top 30m with Vs varying from 430 to 750m/s. It is followed by a high plastic stiff clay layer cemented with sand and gravel with unusually high Vs above 1000m/s. The study region surrounded by 13 major faults has experienced several major earthquakes including the disastrous Bhuj earthquake (Mw=7.7). The seismic hazard level at the site was estimated by deterministic approach and the East Cambay fault with Mw of 6.2 is found to be the controlling source capable of causing a surface PGA of 0.46g. 1D ground response analysis carried out using SHAKE 2000 and DEEPSOIL reveals an amplification of the ground with a surface PGA of 0.52g and 0.43g respectively. The design response spectrum obtained by RRS analysis was compared with several contemporary seismic design codes. It is found that the seismic provisions tend to under estimate the spectral acceleration by about 30% at mid period range. The maximum spectral acceleration compares well with those observed at similar deep stiff soil sites at Los Angeles reported by Chang et al (1997).
