Earthquake-induced displacements of gravity retaining walls and anchor-reinforced slopes

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Earthquake-induced displacements of gravity retaining walls and anchor-reinforced slopes
Aurelian C. Trandafir a,, Toshitaka Kamai b, Roy C. Sidle c
a Department of Geology and Geophysics, University of Utah, 135 South 1460 East Rm 717, Salt Lake City, UT 84112-0111, USA
b Research Centre on Landslides, Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji, 611-0011 Kyoto, Japan
c Slope Conservation Section, Geohazards Division, Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji, 611-0011 Kyoto, Japan
a r t i c l e i n f o
Article history:
Received 20 October 2005
Received in revised form
17 April 2008
Accepted 21 April 2008
Keywords:
Earthquakes
Slopes
Gravity retaining walls
Anchors
Seismic displacements
a b s t r a c t
This paper examines in terms of seismic performance, the effectiveness of anchor reinforcement against
gravity retaining walls used to stabilize a dry homogenous fill slope in earthquake-prone environment.
Both analyzed stabilizing measures have the same design yield acceleration estimated from a limit
equilibrium approach. The earthquake-induced displacements are calculated using a sliding block
formulation of the equation of motion. Sliding failure along the base of the gravity retaining wall and
rotational failure of the soil active wedge behind the wall, as well as rotational failure of the slide mass
of the anchor-reinforced slope were considered in the present formulation. For the specific
characteristics of the analyzed fill slope and input horizontal ground motion, the slope reinforced
with anchors appears to experience vertical and horizontal seismic displacements at slope crest smaller
by 12% and respectively, 32% than the vertical and horizontal earthquake-induced deformations
estimated at the top of the active wedge behind the gravity retaining wall.

فرستنده : مهندس مهران سلطانی نژاد

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