Seismic vulnerability of buildings

Analyzing the vulnerability of buildings consists in trying to predict the behaviour of these constructions in the event of an earthquake, by integrating all our uncertainties. The existing building, i.e. built before the construction rules were put in place, is generally vulnerable. However, monumental or well-built buildings are perfectly resistant to earthquakes. It can also be seen that structures that are identical in principle are more or less easily damaged:

Séisme d’Izmit (Turquie 1999)
Exemple d’application de la vulnérabilité à l’échelle d’une ville

 

 

 

 

 

Exemple d’une construction en béton armé endommagée lors du tremblement du Chili (2010)

 

Many examples have shown considerable differences in damage on groups of structures that are a priori identical.

 

We represent the probability of reaching a damage level (median value +/- uncertainties) for a macro-seismic intensity - Application to Grenoble Earthquake of intensity VII and the probability of being at least damaged (source: VULNERALP project).

 

Even in reinforced concrete, poor compliance with design rules results in the complete destruction of the structure.

ONLY WELL-DESIGNED BUILDINGS CAN WITHSTAND IT.

Reinforced concrete is a material that adapts well to seismic design, when its use is controlled. A structure will only be able to withstand seismic loads if the basic principles are respected. Only trained engineers and architects can offer resistant structures and they are therefore essential.