000015678 001__ 15678
000015678 005__ 20161115135326.0
000015678 04107 $$aeng
000015678 046__ $$k2013-06-12
000015678 100__ $$aSilva Vieira, C.
000015678 24500 $$aBehaviour of a Geosynthetic Reinforced Steep Slope Constructed With Cohesive Backfill Under Earthquake Loading

000015678 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015678 260__ $$bNational Technical University of Athens, 2013
000015678 506__ $$arestricted
000015678 520__ $$2eng$$aThe use of geosynthetics as reinforcement elements of granular backfills has been widely used and their behaviour either during the service life or under seismic loading has been studied by several authors [1, 2]. However the use of fine grained soils, often referred as marginal fills, are not strongly implemented and, since they are susceptible for pore water pressure, not recommended by some international guidelines and standards. The use of soils locally available has cost benefits and sustainable gains. Therefore it is important to study the behaviour of geosynthetic reinforced steep slopes constructed with cohesive backfills. In this work the two-dimensional finite difference program Fast Lagrangian Analysis of Continua (FLAC) was used to model the seismic behaviour of an 8.4 m high geogrid-reinforced steep slope. The embankment was reinforced with 14 horizontal reinforcement layers and its face is inclined of 60º. The seismic behaviour of the structure constructed with cohesive backfill was compared to its behaviour if a granular material was selected. Two constitutive models were used to model the cohesive backfills: the Mohr-Coulomb model and a Strain-Softening model. In order to investigate the influence of input motion on the seismic behaviour of the structure, two earthquake ground motions artificially generated and two variable amplitude harmonic motions were considered. The numerical simulations of the structure behaviour under seismic loading showed that the possible decrease of the backfill shear strength properties with the shear strain during cycling is an important issue. Even so, it could be concluded that a well compacted and drained cohesive soil can be used as backfill material in geosynthetic reinforced steep slopes.

000015678 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015678 653__ $$aGeosynthetics, Reinforced soil, Cohesive Soil, Numerical modelling, Earthquake loading

000015678 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015678 720__ $$aSilva Vieira, C.$$iLopes, M-L.
000015678 8560_ $$ffischerc@itam.cas.cz
000015678 8564_ $$s258669$$uhttps://invenio.itam.cas.cz/record/15678/files/1240.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 39 RECENT ADVANCES AND CHALLENGES IN GEOTECHNICAL EARTHQUAKE ENGINEERING
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000015678 962__ $$r15525
000015678 980__ $$aPAPER