Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

Seismic analyses of a barrage raft floor resting on homogeneous and heterogeneous subsoil condition were carried out by means of finite element modeling and analysis. Three dimensional models considering soil-raft-structure system were developed for both circumstances. The soil continuum, cut-off, pier, beam and abutment were modeled using eight noded brick element whereas raft floor was modeled using four noded plate bending element. The relevant amount of soil around and bottom of the barrage raft foundation has been modeled to find the effect of homogeneous and heterogeneous soil media on the seismic behavior of barrage raft floor. The seismic analysis was performed using the site dependent response spectra by giving excitation across the flow and the finite element analyses takes into account adequately all factors that control significantly the response of the soil-raft-structure system. Influence of homogeneous and heterogeneous soil media was considered on the barrage raft floor under seismic condition at the upstream, ogee and downstream sections. Significant variations in dynamic behaviour of barrage raft floor were found and it has also been observed that stresses are significantly higher under heterogeneous soil medium compared to homogeneous soil medium.

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

Seismic Response of Barrage Raft Floor Under Heterogeneous Soil Medium

San Diego, California

Seismic analyses of a barrage raft floor resting on homogeneous and heterogeneous subsoil condition were carried out by means of finite element modeling and analysis. Three dimensional models considering soil-raft-structure system were developed for both circumstances. The soil continuum, cut-off, pier, beam and abutment were modeled using eight noded brick element whereas raft floor was modeled using four noded plate bending element. The relevant amount of soil around and bottom of the barrage raft foundation has been modeled to find the effect of homogeneous and heterogeneous soil media on the seismic behavior of barrage raft floor. The seismic analysis was performed using the site dependent response spectra by giving excitation across the flow and the finite element analyses takes into account adequately all factors that control significantly the response of the soil-raft-structure system. Influence of homogeneous and heterogeneous soil media was considered on the barrage raft floor under seismic condition at the upstream, ogee and downstream sections. Significant variations in dynamic behaviour of barrage raft floor were found and it has also been observed that stresses are significantly higher under heterogeneous soil medium compared to homogeneous soil medium.