Abstract
The ancient Algerian urban nuclei are composed of different kind of structural systems, such as unreinforced masonry building (URM) buildings, reinforced concrete (RC) buildings, steel buildings and last but not the least the reinforced masonry structures. This type of structure is one of the most vulnerable to seismic action, as they were not built to seismic codes and regulations. In this paper, a contribution for the safety assessment of reinforced masonry buildings under seismic loading is presented. With this purpose, a vulnerability index method has been applied to this type of buildings for the Algerian case according to the national seismic regulations (RPA), by identifying the most important parameters that have an influence on the seismic behaviour of such structures. Weighting factors are then assigned to each parameter in order to evaluate the vulnerability index, which allows classifying each assessed structure according to a suggested classification. The weighting factors were first estimated by a dynamic analysis using ten seismic records. Lastly this method was implemented in a Delphi program and performed using several examples to show its efficiency.
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