The graduation thesis presents research on the effect of seismic strengthening on the seismic resistance
of masonry buildings. The study focused on the use of Composite Reinforced Mortar (CRM) as a
strengthening method, applied to a case study of a masonry structure in Ljubljana. Particular attention
was given to evaluate the increase in strength and ductility of an individual walls as well as the global
structure. While designing strengthening method, it was necessary to considered that the building’s
façade is classified as cultural heritage. The nonlinear static analysis of seismic resistance was performed
using SREMB which employs storey collapse mechanism. The pushover curves and the seismic
resistance coefficient (SRC) were calculated. The analysis revealed that structure in its unstrengthened
state, does not meet the required seismic demand. As a result various seismic strengthening options were
explored. This thesis presents two strengthening variants: in first the CRM system was applied to the
interior side of the exterior walls; in the second it was applied on both sides. Although both approaches
improved the structure’s seismic resistance, neither was sufficient to fully meet the demands.
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