Elevação da resistência de alvenaria estrutural com adição de reforço.

In this paper are presented results of the load tests of the two strengthening systems (stainless steel with helicoidally shape and in Czech Republic new developed GFRP reinforcement). The aim of performed work was to document possibilities of the use of those systems for the strengthening of masonry structures loaded with the interaction of a normal force and a bending moment and to verify experimentally the behaviour of specially shaped profi les of the reinforcement and the grout in masonry. Furthermore, to obtain comparison of effi ciency of both reinforcing systems, to collect basic design data for the structural analysis of strengthened masonry members, as strengthening of masonry structures is not possible to design according to the Czech standards ?SN 731101 and ?SN 731102. The method of additionally inserted non-prestressed reinforcement allows additional strengthening of masonry structures without a necessity of large intervention into vaults especially in case of external application. This system is capable redistribute newly originated stresses from load that act on a strengthened construction. The aim of reinforcing is to restrict the development of existing cracks and eliminate possibly an origin of the new ones, and to improve load-bearing capacity of vaulted masonry constructions.