| Summary: | 碩士 === 淡江大學 === 土木工程研究所 === 83 === This paper utilized the psudo-static method to calculate the
seismic earth pressure, both active and passive, acting on
rigid retaining walls. The failure surface behind the wall was
assumed to be a composite surface composed of a logarithmic
spiral and a slip line from Rankine''s analysis. The computed
active and passive thrusts were expressed as the erath pressure
coefficients regarding the effects of cohesion, vertical
uniform surchage, and unit weight of soil. The study showed
that, when a large earthquake (earthquake coefficient is about
0.3) occurs, the average seismic active and passive thrusts
will be increased by 80% and decreased by 20%, respectively,
that compared with the static cases under the vertical wall and
level surface. This suggests that earthquake has an important
effect on the safety and stability of retaining walls. The
seismic earthquake coefficients, obtained from this study,
compares favorably with the results from literature.
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