Seismic Response of Barrage Raft Floor Under Heterogeneous Soil Medium
2010
- 150Usage
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Metrics Details
- Usage150
- Downloads131
- Abstract Views19
Conference Paper Description
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.
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