000018211 001__ 18211
000018211 005__ 20170118182212.0
000018211 04107 $$aeng
000018211 046__ $$k2017-01-09
000018211 100__ $$aSitar, Nicholas
000018211 24500 $$aInfluence of the Depth of Embedment on Seismic Earth Pressures on Basement Walls

000018211 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018211 260__ $$b
000018211 506__ $$arestricted
000018211 520__ $$2eng$$aObservations of the performance of basement walls and braced retaining structures in recent earthquakes show that failures of basement or deep excavation walls in earthquakes are rare even if the structures were not designed for the actual magnitude of the earthquake loading. For instance, no significant damage or failures of retaining structures occurred in the recent Wenchuan earthquake in China (2008) and the subduction earthquakes in Chile (2010) and Japan (2011). Current design methodologies compute large dynamic loads due to seismic earth pressure that have not been observed in practice. Additionally, while recent research has acknowledged that embedment effects should be incorporated, no specific provisions have been proposed or adopted. To explore this issue a series of centrifuge scale experiments was carried out with different structures and different types of backfill, as follows: 1) a 6 m deep “stiff” non-displacing cross braced retaining structure; 2) a 6 m deep “flexible” non-displacing cross braced retaining structure and 3) a 13 m deep “stiff” non-displacing basement structure. Comparison of the experimental data to current design methodologies using standard procedures and interpretations (e.g., free field peak ground acceleration as the design acceleration) shows that these are over-conservative and that the depth of embedment is important when dealing with basement structures. Using a seismic coefficient, 
000018211 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018211 653__ $$aseismic earth pressure; retaining structure; centrifuge; numerical modeling; embedment effects

000018211 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018211 720__ $$aSitar, Nicholas$$iWagner, Nathaniel
000018211 8560_ $$ffischerc@itam.cas.cz
000018211 8564_ $$s572450$$uhttps://invenio.itam.cas.cz/record/18211/files/1023.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1023.
000018211 962__ $$r16048
000018211 980__ $$aPAPER