000009708 001__ 9708
000009708 005__ 20141205153146.0
000009708 04107 $$aeng
000009708 046__ $$k2008-10-12
000009708 100__ $$aChen, Weiyu
000009708 24500 $$aShoreline Stability - Seismic Retrofit of BART SFTS

000009708 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009708 260__ $$b
000009708 506__ $$arestricted
000009708 520__ $$2eng$$aThis paper presents the shoreline slope stability analyses performed as part of seismic vulnerability studies for the San Francisco Transition Structure (SFTS) of the Bay Area Rapid Transit system Trans Bay Tube (TBT) system. The SFTS connects the TBT to the east with Bored Tunnels to the west via multiple degree-of-freedom seismic joints. For these analyses factor of safety and yield acceleration were evaluated by state-of-the-art 3-D finite difference model (FLAC3D) that incorporate both the 3-D variations in stratigraphy and the interactions with adjacent structures. Those analyses also provide critical insights into the mechanism of interaction between slope movement and the various buried structures. The project criteria required consideration of extremely high shaking levels (PGA of ~ 0.6 g) associated with an approximately 1,000-year return period event. The slope deformations were calculated by: a) a decoupled approach consisting of a 2-D equivalent linear site response analyses (QUAD4M) and Newmark-type analyses, and b) fully-coupled 2-D nonlinear finite element (PLAXIS) and finite difference (FLAC) analyses. The results of the analyses were used to develop inputs for a project global analyses and helped guide the selection/rejection of retrofit measures for the project.

000009708 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009708 653__ $$aFLAC, FLAC3D, PLAXIS, slope stability, dynamic deformation

000009708 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009708 720__ $$aChen, Weiyu$$iChacko, Jacob$$iVahdani, Shahriar$$iLee, Tom
000009708 8560_ $$ffischerc@itam.cas.cz
000009708 8564_ $$s753772$$uhttps://invenio.itam.cas.cz/record/9708/files/04-02-0096.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 04-02-0096.
000009708 962__ $$r9324
000009708 980__ $$aPAPER