000009588 001__ 9588
000009588 005__ 20141205150221.0
000009588 04107 $$aeng
000009588 046__ $$k2008-10-12
000009588 100__ $$aBousias, Stathis
000009588 24500 $$aExperimental Study of Bridge Seismic Isolation Systems with or without Supplemental Energy

000009588 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009588 260__ $$b
000009588 506__ $$arestricted
000009588 520__ $$2eng$$aThe seismic response of isolated bridges is studied experimentally for three different isolation systems which provide, separately or in combination, lengthening of the period and additional energy dissipation. A multi-span highway bridge is subjected to hybrid (sub-structured pseudodynamic) testing, with on-line correction of the measured restoring forces for the velocity-dependent properties of the isolation devices. Common (low damping) elastomeric bearings, lead-rubber bearings (LRBs) and elastomeric bearings coupled with magneto-inductive dissipation devices were tested at several levels of excitation. A broad parametric experimental study was conducted regarding the influence of certain parameters such as the mass of the deck and the level of ground motion. The elastomeric bearings did not satisfy the design requirement of 200% strain at ultimate, but displayed a somewhat higher damping ratio than anticipated. The LRBs provided effective bridge protection reaching almost a strain level of 175% at ultimate and an effective damping ratio of 16%. The combination of elastomeric bearings with a magneto-inductive damper proved to be extremely efficient in containing the response and protecting both the bridge and the bearings.

000009588 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009588 653__ $$aBridges, hybrid testing, isolation devices, seismic isolation, sub-structuring

000009588 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009588 720__ $$aBousias, Stathis$$iStrepelias, Elias$$iPalios, Xenofon$$iFardis, Michael$$iRaftopoulos, S.
000009588 8560_ $$ffischerc@itam.cas.cz
000009588 8564_ $$s491836$$uhttps://invenio.itam.cas.cz/record/9588/files/12-01-0140.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 12-01-0140.
000009588 962__ $$r9324
000009588 980__ $$aPAPER