000019791 001__ 19791
000019791 005__ 20170118182336.0
000019791 04107 $$aeng
000019791 046__ $$k2017-01-09
000019791 100__ $$aChaljub, Emmanuel
000019791 24500 $$aRevisiting Sarma’s Method for Seismic Response of Embankments: First Results

000019791 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019791 260__ $$b
000019791 506__ $$arestricted
000019791 520__ $$2eng$$aGiven the very large length of embankments along rivers and channels, there is a need for a reliable, simple and affordable method to assess the stability of these structures in case of earthquake. However, most of the existing simplified methods have been developed considering earth dams. They are usually not representative in terms of height and frequency range of the particular case of a river embankment. Moreover, the river embankments do not lie directly on the rigid bedrock but on a (soft or stiff) soil foundation. For this last reason, and because it provides an analytical formulation, the Sarma’s method is considered as the first simplified method to apply for assessing the dynamic response of a river embankment. However, it is based on several assumptions that have never been qualified. Therefore, in order to assess the reliability of this method, it is applied on 18 configurations of embankments and soil foundation loaded by 26 accelerograms. The results are compared with those obtained by direct numerical simulation with the spectral element method for the same configurations. The comparisons show that Sarma’s simplified method generally leads to an overestimation of the peak response of the embankment. The discrepancies are mostly explained by the less accurate predictions of higher modes with Sarma’s method and by the assumption of a rigid bedrock under the foundation layer. Moreover, an analysis of the strain distribution indicates that Sarma's (1979) assumption of a uniform damping in the embankment and the foundation layer is far from being always justified, especially for equivalent linear computations. Finally, the main perspectives of this work is to provide an affordable methodology to estimate the peak response of an embankment taking into account the interaction with the underlying soil, which may be more complex than a simple horizontal layer.

000019791 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019791 653__ $$aembankment, dyke, levee, seismic response, simplified method, site effect.

000019791 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019791 720__ $$aChaljub, Emmanuel$$iBard, Pierre-Yves$$iBaillet, Laurent$$iFry, Jean-Jacques$$iGranjon, Romain$$iRenalier, Florence$$iDurand, Capucine
000019791 8560_ $$ffischerc@itam.cas.cz
000019791 8564_ $$s1034025$$uhttps://invenio.itam.cas.cz/record/19791/files/4421.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4421.
000019791 962__ $$r16048
000019791 980__ $$aPAPER