HR: 1330h
AN: S42E-0203    [PDF]
TI: On the Characterisation of a PGA Virtual Distribution of Historical Earthquakes.
AU: * Teramo, A
EM: teramo@unime.it
AF: Osservatorio Sismologico-DICTA, Universit… di Messina, Via Osservatorio 4, Messina, 98121
AU: Termini, D
EM: dtermini@unime.it
AF: Osservatorio Sismologico-DICTA, Universit… di Messina, Via Osservatorio 4, Messina, 98121
AU: Arrigo, G
EM: arrigog@unime.it
AF: Osservatorio Sismologico-DICTA, Universit… di Messina, Via Osservatorio 4, Messina, 98121
AB: The proposed procedure is aimed at the characterization of a virtual PGA distribution of historical earthquakes occurred in a given seismogenic zone, with respect to a macroseismic approach by which some significant parameters of the earthquakes, as epicentre, strike, felt area, magnitude are analytically deduced with a vectorial characterisation of macroseismic intensity. A geometric representation of a PGA virtual distribution, depicted through ellipses that have centres coinciding with the calculated epicentre of the earthquake and envelope the homonymous points of PGA, represents an important reference for seismic hazard studies and allows a configuration of different levels of seismic vulnerability within a damage scenarios characterisation. A comparison of the PGA and intensity virtual distributions (Teramo et al., 1998) of a same earthquake allows moreover a verification between the damage level depicted for a given intensity level and the corresponding PGA value, that is particularly important within seismic studies of monumental and historical buildings damaged from earthquakes.
DE: 7212 Earthquake ground motions and engineering
SC: Seismology [S]
MN: 2003 Fall Meeting