Design of masonry strengthening with one-sided shotcrete applications

Abstract

Load-bearing masonry is quite widespread, including in earthquake-prone areas and zones in which military operations were carried out. At the same time, the existing treasure models, as well as reinforcement technologies, are mainly focused either on strengthening in order to increase the load-bearing capacity, or on restoring structures damaged during operation, actually static loads. Complex retrofitting methods, as well as models of reinforced masonry that have been damaged as a result of seismic or mine-explosive impacts, for the most part are not focused on mass use and imply mainly the re-laying of destroyed areas. At the same time, there is a need to adapt existing high-tech methods of strengthening masonry structures for mass use, taking into account the latest developments in the field of materials science. The most optimal variant of reinforcement, according to the authors, was the use of single-sided shotcrete applications. For this method, a model of reinforced masonry was defined and described in order to carry out a calculation justification and a comprehensive calculation and design methodology was developed, including for load-bearing multi-storey buildings structures. On the basis of laboratory studies, a constructive solution for fixing applications was justified only due to the forces of adhesion to the surface of the base masonry. The specified complex technique was adapted on real objects of multi-storey buildings with load-bearing masonry walls.