Seismic characterization and dynamic site response of a municipal solid waste landfill in Bangalore, India

Anbazhagan, P and SivakumarBabu, GL and Lakshmikanthan, P and VivekAnand, KS (2016) Seismic characterization and dynamic site response of a municipal solid waste landfill in Bangalore, India. In: WASTE MANAGEMENT & RESEARCH, 34 (3). pp. 205-213.

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Abstract

Seismic design of landfills requires an understanding of the dynamic properties of municipal solid waste (MSW) and the dynamic site response of landfill waste during seismic events. The dynamic response of the Mavallipura landfill situated in Bangalore, India, is investigated using field measurements, laboratory studies and recorded ground motions from the intraplate region. The dynamic shear modulus values for the MSW were established on the basis of field measurements of shear wave velocities. Cyclic triaxial testing was performed on reconstituted MSW samples and the shear modulus reduction and damping characteristics of MSW were studied. Ten ground motions were selected based on regional seismicity and site response parameters have been obtained considering one-dimensional non-linear analysis in the DEEPSOIL program. The surface spectral response varied from 0.6 to 2g and persisted only for a period of 1s for most of the ground motions. The maximum peak ground acceleration (PGA) obtained was 0.5g and the minimum and maximum amplifications are 1.35 and 4.05. Amplification of the base acceleration was observed at the top surface of the landfill underlined by a composite soil layer and bedrock for all ground motions. Dynamic seismic properties with amplification and site response parameters for MSW landfill in Bangalore, India, are presented in this paper. This study shows that MSW has less shear stiffness and more amplification due to loose filling and damping, which need to be accounted for seismic design of MSW landfills in India.

Item Type:	Journal Article
Publication:	WASTE MANAGEMENT & RESEARCH
Publisher:	SAGE PUBLICATIONS LTD
Additional Information:	Copy right for this article belongs to the SAGE PUBLICATIONS LTD, 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
Keywords:	MSW landfills; shear wave velocity; cyclic triaxial tests; ground motion; amplification; site response analysis
Department/Centre:	Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA) Division of Mechanical Sciences > Civil Engineering
Date Deposited:	02 Apr 2016 04:54
Last Modified:	02 Apr 2016 04:54
URI:	http://eprints.iisc.ac.in/id/eprint/53392

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