Pseudo-dynamic approach of seismic active earth pressure behind retaining wall |
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| Authors: | Deepankar Choudhury Sanjay S Nimbalkar |
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| Institution: | (1) Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India |
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| Abstract: | Knowledge of seismic active earth pressure behind rigid retaining wall is very important in the design of retaining wall in
earthquake prone region. Commonly used Mononobe-Okabe method considers pseudo-static approach, which gives the linear distribution
of seismic earth pressure in an approximate way. In this paper, the pseudo-dynamic method is used to compute the distribution
of seismic active earth pressure on a rigid retaining wall supporting cohesionless backfill in more realistic manner by considering
time and phase difference within the backfill. Planar rupture surface is considered in the analysis. Effects of a wide range
of parameters like wall friction angle, soil friction angle, shear wave velocity, primary wave velocity and horizontal and
vertical seismic accelerations on seismic active earth pressure have been studied. Results are provided in tabular and graphical
non-dimensional form with a comparison to pseudo-static method to highlight the realistic non-linearity of seismic active
earth pressures distribution. |
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| Keywords: | seismic active earth pressure phase difference pseudo-dynamic approach non-linear distribution |
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