Resumen

SARACHO, José A.; PEREZ, Gustavo A.  y  DIP, Oscar. PROCEDURE FOR SELECTION OF ACCELEROGRAMS FOR FRAGILITY STUDIES IN TYPICAL BRIDGES OF ARGENTINA. Ing. sísm [online]. 2021, n.106, pp.76-111.  Epub 18-Mar-2022. ISSN 0185-092X.  https://doi.org/10.18867/ris.106.553.

The accelerograms adopted to perform fragility studies in bridges through non-linear dynamic analysis are one of the components with the greatest influence on the results obtained. The objective of this paper is to present a methodology for the selection and scaling of real accelerograms of earthquakes recorded in different parts of the world in tectonic environments similar to those of the Argentine central-west, in order to have series of records compatible with spectra for different site classes, seismic hazard zones and seismic hazard levels. For this, the web application of the PEER (Pacific Earthquaque Engineering Research Center) seismic ground motion database was used. The target spectrum and different parameters were taken into consideration, such as: magnitude of the earthquake, type of faulting, distance of the structure to the fault, site shear wave velocity in the upper 30 meters, etc. Through the application of a novel criterion, in which the Spectral Acceleration Intensity (ASI) is considered, 16 series of earthquakes were reached considering: 4 classes of site, areas of high and very dangerous seismic in the national territory and recurrence periods 500 and 2500 years. These series of records representative of the seismicity of the referred region can then be used to obtain fragility curves of greater reliability for different classes of typical bridges.

Palabras llave : accelerograms; fragility; seismic vulnerability; bridges; Argentina.

        · resumen en Español     · texto en Español     · Español ( pdf )