Abstract
This paper proposes the use of multiple nonlinear static analyses for the seismic assessment of irregular masonry buildings without box behavior. The methodology consists in executing a series of sequential pushover analyses on the spatial model of the building by rotating the horizontal loading direction from 0° to 360°. The so-called multi directional pushover analysis allows a more realistic evaluation of the seismic vulnerability, since it can represent a higher number of possible failure mechanisms than in the conventional pushover analysis restricted to the two “principal” directions of the structure. The application of the methodology to a highly irregular masonry building located in Chile shows that the detected failure mechanisms are in very good agreement with those derived from nonlinear dynamic analysis, as well as with the damage experienced by the structure after the earthquake of February 27, 2010 (Mw 8.8).
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