1) PhD Student, ICIST, DECivil, Instituto Superior Técnico, Universidade de Lisboa,

2) Associate Professor, ICIST, DECivil, Instituto Superior Técnico, Universidade de Lisboa,

3) Assistant Professor, University of Genoa,

4) Full Professor, University of Genoa,


‘Gaioleiro’ buildings, built between the mid nineteenth and the beginning of the twentieth century in Lisbon, represent the masonry typology with the highest structural weaknesses from the existing building stock. Thus, four building case studies with different plan dimension and configuration were selected to represent the typology. The building structures were modelled based on the non-linear equivalent frame model approach considering Tremuri Program. The in-plane capacity curves were determined by incremental non-linear static (pushover) analyses in order to compare the seismic performance of the different types of buildings. Finally, assuming a lognormal distribution probability function, fragility curves were obtained. The results confirm the seismic vulnerability of these buildings and the need of defining appropriate strengthening solutions.


Keywords: Unreinforced Masonry Buildings, Performance-Based Assessment, Non-linear Static (Pushover) Analysis, Fragility Analysis