Generalized Seismic Active Thrust on a Retaining Wall with Submerged Backfill Using a Modified Pseudodynamic Method
Publication: International Journal of Geomechanics
Volume 17, Issue 3
Abstract
The appropriate estimation of seismic earth pressures acting on retaining walls supporting submerged backfill is an important area of research in earthquake geotechnical engineering. There is a scarcity of research work on retaining walls with submerged soil under seismic conditions in the literature. In this paper, closed-form generalized solutions for computing seismic active earth thrust and its distribution on nonvertical rigid retaining walls with fully submerged backfill are proposed using the modified pseudodynamic approach. The seismic analysis of retaining walls was carried out with a planar rupture surface in viscoelastic submerged backfill. The proposed modified pseudodynamic analysis satisfied the zero-stress-boundary condition on a free surface and considered the standing shear and primary waves, soil damping, amplification in the backfill, and an excess pore-pressure ratio in the backfill. A detailed parametric study was performed to gain an understanding of the effects of different parameters, including the horizontal seismic acceleration coefficient, excess pore-water-pressure ratio, period of lateral shaking, damping ratio, wall inclination, and soil-friction and wall-friction angles. A comparison of the present study results and the existing analytical and experimental studies resulted in good agreement.
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Acknowledgments
The authors acknowledge Professor Paul Michaels (Boise State University, Boise, Idaho) and Anindya Pain [scientist, CSIR-CBRI Roorkee, Academy of Scientific and Innovative Research (AcSIR)] for valuable input during the preparation of this paper.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 17 • Issue 3 • March 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jan 15, 2016
Accepted: May 27, 2016
Published online: Aug 5, 2016
Discussion open until: Jan 5, 2017
Published in print: Mar 1, 2017
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