Seismic Passive Earth Pressure Behind Non Vertical Wall with Composite Failure Mechanism: Pseudo-Dynamic Approach |
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Authors: | Priyanka Ghosh Sreevalsa Kolathayar |
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Institution: | (1) Department of Civil Engineering, Indian Institute of Technology, Kanpur, 208 016, India |
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Abstract: | This note shows a study on the seismic passive earth pressure behind a non-vertical cantilever retaining wall using pseudo-dynamic
approach. A composite failure surface comprising of an arc of the logarithmic spiral near the wall and a straight line in
the planar shear zone near the ground, has been considered behind the retaining wall. The effects of soil friction angle,
wall inclination, wall friction angle, amplification of vibration, horizontal and vertical earthquake acceleration on the
passive earth pressure have been explored in this study. The results available in the literature for passive pressure, on
the basis of pseudo-static analysis are found to predict the passive resistance on the conservative side and the assumption
of a planar failure surface is found to overestimate the passive resistance for higher wall friction. An attempt has been
made in the present study to overcome both the limitations simultaneously. The present results are compared with the existing
values in the literature and found a reasonable match among the values. |
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