000009388 001__ 9388
000009388 005__ 20141205150201.0
000009388 04107 $$aeng
000009388 046__ $$k2008-10-12
000009388 100__ $$aAlgie, Tom
000009388 24500 $$aCentrifuge Modeling of Innovative Foundation Systems to Optimize Seismic Behavior of Bridge Structures

000009388 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009388 260__ $$b
000009388 506__ $$arestricted
000009388 520__ $$2eng$$aThe effects of rocking bridge foundations were investigated by two series of highly instrumented centrifuge tests. Slow cyclic tests on shallow foundations supporting rigid elastic columns were performed to capture the nonlinear moment-rotation behavior of foundations. Dynamic shaking tests were performed on lollipop bridge structures with variable footing dimensions supporting yielding columns. Results show that the test columns produced a well-defined moment capacity. Plastic rotation demand on the column decreases consistently with a decrease in the foundation moment capacity and a rocking footing can reduce ductility demand and permanent drift, improving bridge system behavior. Numerical analyses were implemented in OpenSees, an open source finite element platform, to validate the experimental results by using nonlinear Winkler springs simulating footing behavior. Numerical analysis is shown to be able to capture the experimental results satisfactorily. If settlement associated with rocking may be significant, experiments show that the settlement may be reduced by strategically locating relatively small zones of improved soil.

000009388 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009388 653__ $$aShallow foundations, rocking, bridge, centrifuge, seismic performance, numerical analysis

000009388 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009388 720__ $$aAlgie, Tom$$iDeng, Lijun$$iErduran, Emrah$$iKutter, Bruce L.$$iKunnath, Sashi
000009388 8560_ $$ffischerc@itam.cas.cz
000009388 8564_ $$s1909352$$uhttps://invenio.itam.cas.cz/record/9388/files/04-01-0051.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 04-01-0051.
000009388 962__ $$r9324
000009388 980__ $$aPAPER