000010983 001__ 10983
000010983 005__ 20141205155824.0
000010983 04107 $$aeng
000010983 046__ $$k2008-10-12
000010983 100__ $$aMills-Bria，Barbara,
000010983 24500 $$aCurrent Methodology at the Bureau of Reclamation for the Nonlinear Analyses of Arch Dams Using Explicit Finite Element Techniques

000010983 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010983 260__ $$b
000010983 506__ $$arestricted
000010983 520__ $$2eng$$aThe Bureau of Reclamation is using explicit finite element techniques to perform static and seismic non-linear structural analysis of concrete dams. The analyses presented are for a 500-foot-high thick arch dam in a wide canyon and a 260-foot-high thin arch dam in a narrow canyon. The thick arch dam has 160,000 nodes, 26 contraction joints and a potentially moveable foundation block. The reservoir upstream from the older arch dam and the water between the dams is modeled with fluid finite elements. The fluid elements provide hydrostatic and hydrodynamic interactions for this complex condition. Contact surfaces capable of sliding and opening represent the contraction joints, unbonded lift lines, foundation discontinuities, and interfaces between the dam, foundation, and reservoir. Non-reflecting boundaries are at the foundation and reservoir extents. Deconvolved ground motions are applied at depth in the foundation, propagate up through the foundation and provide spatially varying motions around the canyon. Material properties were obtained from laboratory tests and further calibrated using natural frequencies. Photogrammetry techniques were used for accurate surface topography and foundation bedding plane orientations. The finite element model of the thin arch dam has over 400,000 nodes. There is an older 210-foot-high arch dam just 7 feet upstream that is included in the model. Seasonal thermal loads are applied to the thin arch dam. The program TRUEGRID was used to create the model geometry and LSDYNA was used for the structural analyses.

000010983 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010983 653__ $$aNon-linear, dam, dynamic, foundation block, seismic, finite element

000010983 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010983 720__ $$aMills-Bria，Barbara,$$iK., Nuss，Larry$$iChopra，Anil,
000010983 8560_ $$ffischerc@itam.cas.cz
000010983 8564_ $$s515118$$uhttps://invenio.itam.cas.cz/record/10983/files/S13-048.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S13-048.
000010983 962__ $$r9324
000010983 980__ $$aPAPER