4/30/2023 0 Comments Dorico expression mapsStarting from these approaches, the international community, e.g.,, adopted seismic codes to evaluate the ground motion amplification phenomena in order to elaborate the anti-seismic planning of new structures and to preserve the archaeological cultural heritage. They are responsible for seismic energy trapping and resonance phenomena in the shallowest part of the subsurface and relative interference phenomena of engineering interest. Several theoretical models based on experimental data highlighted the relationships between ground shaking and geological–geomorphological settings. For the first time, this multidisciplinary approach allows us to draw a seismic microzonation map for one of the most important archaeological sites of the world.įrom the beginning of the 20th century, there has been an improvement in studies concerning the significant role of the local geological–geomorphological setting in controlling the distribution of damage induced by earthquakes. It is not uncommon to also have the combination of these two factors. In particular, the damages caused by the 62–63 AD earthquakes seem to be mainly due to topographical factors such as steep scarps and slopes, ridges, peaks, and terraces, as well as to the major thickness of the soft sediments (loose volcanoclastic layers, paleosols, weathered lavas, and anthropogenic infillings) located over the well-lithified lavas. Selected areas and examples of compromised and reconstructed buildings show that the ancient topography and subsoil features (both lithological and seismic) are the main AFs. In addition, analyses of the topographical features, subsoil stratigraphies, and geophysical surveys, responsible for local seismic amplification (site effects), allow us to define the sectors of the ancient city where the Amplification Factors (AFs) were the main ones responsible for damage. In order to evaluate the distribution of the damage and reconstructions due to the earthquake, detailed mappings of the structures were carried out using multidisciplinary approaches. Large sectors of the city were reconstructed after this earthquake while other parts were still under reconstruction when the fall-out and pyroclastic density currents of the eruption buried the Roman city. Pompeii Archaeological Park is the best laboratory for the study of the seismic site effects on cultural heritage: the ancient site was destroyed and buried by the 79 AD Vesuvian eruption and, furthermore, it was also affected by the 62–63 AD strong earthquake.
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