Seismic Passive Earth Thrust on Retaining Walls with Cohesive Backfills Using Pseudo-Dynamic Approach |
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| Authors: | A H Shafiee A Eskandarinejad and M Jahanandish |
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| Institution: | (1) Civil Engineering Department, Shiraz University, Shiraz, Iran;(2) Civil Engineering Department, University of Hormozgan, Bandarabbas, Iran |
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| Abstract: | In this paper, the pseudo-dynamic approach is used to estimate seismic passive earth thrust on retaining walls with cohesive-frictional
backfills. The time-dependent pseudo-dynamic approach considers the influence of dynamic parameters such as the velocity of
primary and shear waves, the period of lateral shaking, and the phase and amplitude variations of horizontal and vertical
earthquake accelerations with depth. The failure plane behind the wall is assumed to be planar. The analysis is based on the
equilibrium of forces which act within the failure wedge. The obtained results show that the backfill cohesion increases both
the seismic passive earth thrust and the failure plane inclination angle with the horizontal plane. It is also observed that
both horizontal and vertical seismic accelerations have decreasing effect on seismic passive earth thrust as well as failure
plane inclination angle. The results of present pseudo-dynamic analysis propose a lower solution for seismic passive earth
thrust compared to earlier pseudo-static solution available in the literature. |
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