A numerical study on the dynamic behaviour of gravity and cantilever retaining walls with granular backfill

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2007

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Yıldız, Ersan

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Dynamic behaviour of gravity and cantilever retaining walls is investigated by finite element method, incorporating the nonlinear elasto-plastic material properties of soil and seperation of the wall and backfill. Two dimensional finite element models are developed employing the finite element software ANSYS. The wall is modelled to rest on a soil layer allowing translational and rotational movements of the wall. Soil-wall systems are subjected to harmonic and real earthquake motions with different magnitude and frequency characteristics at the base. The maximum lateral force and its application point durinG dynamic loading are determined for each case. It is observed that the frequency content of the base motion has a significant influence on the dynamic lateral soil pressures and the lateral forces considerably increase as the base motion frequency approaches the fundamental frequency of the soil layer. The maximum lateral thrusts calculated by finite element analyses are generally found to be greater than those suggested by Mononobe-Okabe method and experimental findings. Nevertheless, the locations of the application point obtained by finite element method are found to be in good agreement with the results of experimental studies.

Subject Keywords

Seismic earth pressure.

URI

http://etd.lib.metu.edu.tr/upload/2/12608145/index.pdf
https://hdl.handle.net/11511/16850

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Yıldız, “A numerical study on the dynamic behaviour of gravity and cantilever retaining walls with granular backfill,” Ph.D. - Doctoral Program, Middle East Technical University, 2007.