Title: Assessmnet of the Seismic Performance of an Existing Plan-Wise Irregular Building
Citation: Proceeding of the 5th European Workshop on the Seismic Behaviour pf Irregular and Complex Structures p. 209-221
Publisher: University of Catania
Publication Year: 2008
JRC N°: JRC46264
URI: http://www.5ewics.dica.unict.it/
Type: Articles in periodicals and books
Abstract: The SPEAR (Seismic PErformance Assessment and Rehabilitation of existing buildings) building was a three-storey full-scale replica of an existing non-seismic building. It was intended as representative of the southern European construction practice of the ¿60s and ¿70s, and was built by reproducing materials and detailing of that period. The most interesting feature was the presence of a number of sources of structural irregularity, resulting into a 10% in-plan eccentricity. The mock up was pseudodynamically tested as subjected to a bidirectional seismic input, in its original configuration as well as in two conceptually different rehabili-tated configurations, one aimed at increasing the global available ductility by in-creasing the confinement in all the potential plastic hinge zones, the other aimed at reducing the torsional response by re-locating the centre of strength in the vicinity of the gravity centre. Based on the results of the testing activities, and reverting to the real building, a cost-benefit analysis was carried out for the two rehabilitation measures. This in-cluded the estimations of the costs associated to the different damage states, pro-vided by the engineering practice. The probability of attaining each damage state was obtained by combining the experimental skeleton curves with the probabilistic definition of the expected intensities based on the very recent seismicity maps of Italy. Conclusions were drawn on the effectiveness of the retrofitting interventions in terms of reduction of the expected loss during the lifetime of the building.
JRC Directorate:Space, Security and Migration

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