Miranda Acuña, Victor

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    Parámetros sísmicos de registros de temblores medidos en Puerto Rico y su distribución geográfica
    (2016) Miranda Acuña, Victor; Suárez, Luis E.; College of Engineering; Martínez-Cruzado, José A.; Huerta-López, Carlos I.; Pagán-Trinidad, Ismael; Department of Civil Engineering; Huérfano, Víctor
    In the present study the geographical distribution of several seismic parameters calculated for three earthquakes recorded by the Puerto Rico Strong Motion Program (PRSMP) were analyzed. These seismic parameters have been proposed in the literature and were used for different research purposes: they were associated with the frequency content, amplitude, energy released, duration and structural damage produced by earthquakes. However, many of them are not commonly used in the Earthquake Engineering practice. The seismic events studied were those with larger magnitude and intensity. Moreover, to achieve the most complete geographical distribution for the whole island, the events with the largest number of seismic records available in the PRSMP network were selected. For the data processing a computer code was developed in MATLAB© to read, process and correct the accelerograms and to calculate all the seismic parameters for each one of the three components. The results were presented by means of contour maps using the program ArcGIS©. Using these maps it is possible to discern the geographical distribution, behavior and variation of each seismic parameter in the Puerto Rico territory for each of the earthquake analyzed. It was possible to identify in the analysis that there are zones where some of the parameters show low variability, even though they were produced by different seismic events. This is the case, for instance, of the periods associated with peaks in the response spectra which showed the highest values in the coastal areas whereas the central mountainous areas displayed the minimum values for the three earthquakes analyzed. Also it was concluded that there are areas which tend to have the largest soil response. The Utuado region, in the center of the island, is where the largest seismic energy was observed, along with the highest peak ground responses.