Damage Probability Matrices Derived from Earthquake Statistical Data

Abstract eng:
A methodology is presented for the empirical vulnerability assessment of typical building types, representative of the building stock of Southern Europe, based on processing of a large set of statistical data. The observational database is obtained from post-earthquake surveys carried out after the 7-9-1999 Athens earthquake and comprises 180.945 damaged buildings. A damage scale is presented wherein the performance levels are defined according to the physical description of the seismic damage and, as well, in terms of structural and economical damage index. The seismic demand is described by estimating the macroseismic intensity for each region. The relative frequency of the different damage states, for each structural type and each intensity level, is computed, in terms of damage ratio by evaluating the ratio of the number of damaged buildings belonging to a specified structural type and a region with a certain intensity level, to the total number of buildings of the same region and building class. Following the pre-described methodology damage probability matrices (DPM) and vulnerability curves are obtained for specific structural types.

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