Development of Retrofitting Solutions: Remedial Wall Ties for Masonry Enclosure Brick Walls

The external envelope walls of a significant percentage the residential building stock in Southern European countries is commonly constituted by infill masonry walls. However, thousands square meters this wall typology presents severe issues cracking and instability, related to incorrect deficient support conditions outer brick panel double-leaf solution. In work, an experimental campaign divided two phases has been performed evaluate effectiveness different remedial ties retrofitting techniques (Solution A Solution B) used for double leaf horizontally hollowed clay façades. first phase was on 120 isolated specimens bricks, resorting post- pre-NP EN 771-1 exemplars (that is, new pre-existent aged respectively), as well 4 wallettes, with side length 1.20 m, considered representative real scale scenario, evaluating techniques. second fully characterize failure types slipping phenomena observed campaign, focusing solely technique B comprises 24 tests specimens, resourcing bricks well. results obtained use these revealed average anchorage strength value ranging from 0.25 2.5 kN each tested tie-bar. reveals increase comparison A. sense, global suitable applicability both retrofit studied solutions.