Seismic Hazard in Albania: What Every Designer Should Know

Albania lies in one of the most seismically active zones in Europe. This is not new information, but until a few years ago it was treated as a note at the end of the design report. The November 2019 earthquake moved the issue from paper to practice: today no serious project goes through without confronting the question of what happens when the ground moves.

From the map to the load

The starting point is the peak ground acceleration, PGA, for the specific location and for a given probability of exceedance. This is not a decorative number: it directly determines the horizontal force for which the structure is sized. Two locations in the same municipality can have noticeably different values, so taking a value "for the city" instead of for the construction site is a shortcut that costs dearly.

The ground beneath the foundation matters as much as the structure

The same earthquake is felt differently on rock and on soft alluvial deposits. Soft layers amplify the waves — a phenomenon clearly seen in the uneven damage of 2019. That is why soil classification is not a formality; it changes the design spectrum and, consequently, the reinforcement.

Where structures fail

Severe damage rarely comes from a lack of concrete. It comes from detailing: sparse stirrups at joints, columns weaker than beams, soft storeys where the ground floor is open for shops while the upper floors have walls. Eurocode 8 addresses these explicitly, and it is precisely these details that make the difference between a structure that is damaged and one that collapses.

How AlbGIS helps

• PGA Map — ground acceleration by administrative unit, for 10% exceedance in 10 and in 50 years.
• Seismic Hazard — an assessment for any point on the map, based on 510 historical events and the attenuation formula.
• Reinforced Concrete (EC2) — design and verification of beams and columns according to Eurocode 2, with the N–M interaction diagram.