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NameSeismic Assessment and Retrofitting of R.C. Existing Buildings
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13th World Conference on Earthquake Engineering
Vancouver, B.C., Canada
August 1-6, 2004

 
Seismic Assessment and Retrofitting of R.C. Existing Buildings
 
Relators: Ciro FAELLA, Enzo MARTINELLI, Emidio NIGRO
 
A great part of the existing r.c. structures built in Italy (but even in the Mediterranean basin) have been designed without considering seismic-induced actions and seismic criteria for strength and ductility design. Assessing of seismic behaviour of existing building can be faced according to main focuses, namely in terms of either maximum strength against the horizontal seismic actions and maximum ductility, consisting in the capability for plastic displacements. According with the most modern seismic codes and guidelines (i.e. Eurocode 8 and FEMA 178 and 273) seismic behaviour of structures must be analysed in terms of performance both under service and destructive earthquakes. Seismic response of r.c. structures under seismic shaking should be analysed by means of complex nonlinear dynamic procedures requiring a large number of accelerograms for describing the possible seismic input and great computational efforts. However, Capacity Spectrum Method (CSM) provides a solutionvery easy-to-obtain and reliable enough.
In the present paper, such a method has been widely adopted for evaluating the performance point of the structures considered in the analyses.

 

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