000009872 001__ 9872
000009872 005__ 20141205153202.0
000009872 04107 $$aeng
000009872 046__ $$k2008-10-12
000009872 100__ $$aDi Sarno, Luigi
000009872 24500 $$aSeismic Assessment of an Irregular Base Isolated Hospital

000009872 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009872 260__ $$b
000009872 506__ $$arestricted
000009872 520__ $$2eng$$aThe present paper discusses the results of extensive dynamic analyses carried out on a large irregular base isolated hospital building, under construction in Naples, Italy. The framed structure of the multi-storey building is assumed as a sample system to assess the reliability of linear and non linear dynamic analyses implemented in modern codes of practice world-wide and they conservatism, if any. In so doing, a suite of spectrum compatible natural records are utilized to perform linear and non linear response analyses. The results of such analyses are then compared with simplified methods based on single-degree-of-freedom approximations. It is found that the selection of adequate natural records from existing earthquake catalogues is not straightforward, especially for base isolated structures which are affected chiefly by long distance and high magnitude events. A non linear model to simulate the dynamic response of rubber bearings is also presented and issues related to the calibration of such model are also highlighted; these calibrations are significantly affected by the fundamental frequency of vibration of the sample structural system. It is concluded the linear analyses may underestimate the displacements of the devices in base isolated structures when compared with non linear response analyses. To enhance the reliability of the analysis results, it is of paramount importance to calibrate the dynamic response of the rubber isolators on the fundamental frequency of vibration of the base isolated framed system and to select long distance and high magnitude pairs ground motions from existing catalogues of earthquakes, if available.

000009872 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009872 653__ $$aBase isolation, seismic assessment, structural analysis, modeling, rubber isolators, seismic codes 

000009872 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009872 720__ $$aDi Sarno, Luigi$$iChioccarelli, Eugenio$$iCosenza, Edoardo
000009872 8560_ $$ffischerc@itam.cas.cz
000009872 8564_ $$s740615$$uhttps://invenio.itam.cas.cz/record/9872/files/08-02-0084.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 08-02-0084.
000009872 962__ $$r9324
000009872 980__ $$aPAPER