000021523 001__ 21523
000021523 005__ 20170622131250.0
000021523 04107 $$aeng
000021523 046__ $$k2017-06-15
000021523 100__ $$aCastaldo, Paolo
000021523 24500 $$aOPTIMAL FRICTION COEFFICIENTS FOR ISOLATED STRUCTURES DEPENDING ON THE SOIL CONDITION

000021523 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021523 260__ $$bNational Technical University of Athens, 2017
000021523 506__ $$arestricted
000021523 520__ $$2eng$$aThis study aims at evaluating the optimal properties of friction pendulum bearings to be employed for the seismic protection of elastic isolated structural systems under earthquake excitations with different characteristics in terms of frequency content. A two-degreeof-freedom model is considered to describe the isolated system behavior while accounting for the superstructure flexibility and a non-dimensional formulation of the governing equations of motion is employed to relate the characteristic parameters describing the isolator and structure properties to the response parameters of interest for the performance assessment. Seismic excitations are modelled as time-modulated filtered Gaussian white noise random processes of different intensity within the power spectral density method. The filter parameters control the frequency content of the random excitations and are calibrated to describe stiff, medium and soft soil conditions, respectively. Finally, multi-variate regression expressions are obtained for the optimum values of the friction coefficient that minimize the superstructure displacements relative to the base mass as a function of the structural system properties, of the seismic input intensity and of the soil condition.

000021523 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021523 653__ $$aseismic isolation; friction pendulum isolators; performance-based engineering; non-dimensional form; optimal isolator properties; power spectral density method; soil condition.

000021523 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021523 720__ $$aCastaldo, Paolo$$iRipani, Marianela
000021523 8560_ $$ffischerc@itam.cas.cz
000021523 8564_ $$s1344706$$uhttps://invenio.itam.cas.cz/record/21523/files/16854.pdf$$yOriginal version of the author's contribution as presented on CD, section: [RS13] Optimum design and control in structural dynamics and earthquake engineering
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000021523 962__ $$r21500
000021523 980__ $$aPAPER