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Frequency response analysis of layered ground in Ahmedabad during Bhuj earthquake

Sitharam, TG and Prasad, SK and Ravikumar, M and Murthy, BRS and GovindaRaju, L (2003) Frequency response analysis of layered ground in Ahmedabad during Bhuj earthquake. In: Frequency response analysis of layered ground in Ahmedabad during Bhuj earthquake, AUG 04-08, 2003, Singapore.

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Abstract

This paper presents the results of seismic response analysis of layered ground in Ahmedabad City during the earthquake in Bhuj on 26(th) January 2001. An attempt has been made to understand the reasons for the failure of multistoreyed buildings founded on soft alluvial deposits in Ahmedabad. Standard Penetration test at a site very close to the Sabarmati river belt was carried out for geotechnical investigations. The program SHAKE91, widely used in the field of earthquake engineering for computing the seismic response of horizontally layered soil deposits, was used to analyse the soil profile at the selected site considering the ground as one dimensional layered elastic system. The ground accelerations recorded at the ground floor of the Regional Passport Staff Quarters building, which is very close to the investigated site, was used as input motion. Also, Finite Element Analysis was carried out for different configurations of multistorey building frames for evaluating their natural frequencies and is compared with the predominant frequency of the layered soil system. The results reveal that the varying degree of damage to multistorey buildings in the close proximity of Sabarmati river area was essentially due to the large amplification of the ground and the near resonance condition.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to World Scientific Publishing Company.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 08 Mar 2012 08:51
Last Modified: 08 Mar 2012 08:51
URI: http://eprints.iisc.ernet.in/id/eprint/43752

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