000010938 001__ 10938
000010938 005__ 20141205155818.0
000010938 04107 $$aeng
000010938 046__ $$k2008-10-12
000010938 100__ $$aMedeot, Renzo
000010938 24500 $$aExperimental Validation of RE-Centering Capability Evaluation Based on Energy Concepts

000010938 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010938 260__ $$b
000010938 506__ $$arestricted
000010938 520__ $$2eng$$aPresent Norms do not furnish an acceptable approach of general validity to evaluate the re-centring capability of seismic isolation systems and none of them is based upon solid theoretical fundamentals, but rather, make reference to empirical approaches. This author developed a theoretical approach to this problem, suggesting an energy-based criterion for its quantification, that also incorporates praiseworthy simplicity. It just involves the comparison of two calculable and measurable physical magnitudes, namely the elastically (or, better said, reversibly) stored and the irreversibly dissipated earthquake energy input. The newly proposed criterion was accepted for an oral presentation at the 13th World Conference (Vancouver, 2004) and since then gained an increasing consensus among the technical and scientific community. The validity of the new criterion has been confirmed by the results of several hundreds of step-by-step non-linear analyses conducted on real cases, as well as by a degree thesis at the University of Padua (Italy). Its experimental validation occurred only recently within the framework of the LESSLOSS Research Project funded by the European Commission, which lasted three years (2004-2007). Over 200 trials were conducted in two distinct testing campaigns at the shake-table facility of ENEA Casaccia near Rome. The results have fully substantiated the method for evaluating the re-centring capability of seismic isolated systems based on the energy approach. The scope of this paper is that of illustrating the testing program and reporting in detail the results thereof, as well as commenting on the blatant discrepancies with the criteria adopted in some international Norms.

000010938 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010938 653__ $$a

000010938 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010938 720__ $$aMedeot, Renzo
000010938 8560_ $$ffischerc@itam.cas.cz
000010938 8564_ $$s330595$$uhttps://invenio.itam.cas.cz/record/10938/files/12-03-0108.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 12-03-0108.
000010938 962__ $$r9324
000010938 980__ $$aPAPER