The on-line seismic risk assessment software establishes the need for a more accurate investigation by evaluating the expected damage on the proposed structure starting from an assessment of the seismic hazard on rock at the location selected by the user, and then considering the local soil amplification due to the site soil conditions. A set of analyses were executed at the central design office covering a regular grid on the territory and were stored in a remote database accessible from the AESP through a servlet located on a Web Server. Such results are then coupled with amplification factors derived from suitable attenuation laws. Fragility curves are finally used to etimate, for the computed acceleration level, the likelihood of exceeding a given level of damage for the proposed structure typology.


The following steps are performed in the simplified analysis:

• Assessment of seismic hazard on rock, by accessing a remote database of pre-performed off-line analyses on the region of interest and interpolating the value at the location selected by the user;
• Evaluation of local site amplification effects by means of two alternative approaches (i.e., base method and advanced method);
• Evaluation of the expected damage on the given structure typology by means of pre-defined fragility curves.

The AESP uses the following data:

• Building data - type of structure, shape, number of floors, frame type etc.;
• Soil data - soil stratigraphy, soil type, depth of bedrock, susceptibility to liquefaction etc.;
• Geographical data - co-ordinates.

Therefore the user will have the possibility to choose, on the basis of the information available to him, to use:

• Base Method
• Advanced Method