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Seismic analysis and retrofit of a mid-rise building

TitoloSeismic analysis and retrofit of a mid-rise building
Tipo di pubblicazionePresentazione a Congresso
Anno di Pubblicazione2015
AutoriSaitta, F., Clemente Paolo, Buffarini Giacomo, and Bongiovanni Giovanni
Conference NameCOMPDYN 2015 - 5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
Parole chiaveBase isolation, Buildings, Computational methods, Dynamic analysis, Earthquakes, Engineering geology, Experimental analysis, Experimental modal analysis, Finite element method, Geophysics, Modal analysis, Pile foundations, Piles, Reinforced concrete, Retrofitting, Seismic isolation systems, Seismic reliability, Seismic vulnerability, Seismology, Structural analysis, Structural dynamics, Structural modelling, Tall buildings, Torsional movements

The structural analysis of an about 30 m tall building is presented in this paper. It was constructed in 70s, so its use pointed out the issue of the seismic reliability of existing buildings, especially if considered of strategic importance for civil protection. The structure is composed by two parts, the lower one in reinforced concrete, which contains a theatre room, and an upper in steel. The study allowed defining the seismic vulnerability. A refined finite element model was assembled and updated on the basis of comprehensive experimental analyses on materials and structure and also of experimental modal analysis, highlighting the dynamic effect due to the irregularity of the building and the influence of the adjacent building, the seismic joint is missing. The results pointed out a quite high vulnerability of the building to seismic actions and the inadequacy of the pile foundation to support horizontal seismic loads. A retrofit intervention, based on the insertion of a seismic isolation system and the realization of a seismic joint with the adjacent building, is proposed. It allows reducing the horizontal forces in the piles and the torsional movements of the structure.

Citation KeySaitta20153909