Limit Analysis under lateral Loads of Masonry vaults updated by Omega-Wrap

In this paper, the structural behavior under lateral load of a masonry barrel vault strengthened by new technology in applying Carbon Fiber Reinforced Polymer (C-FRP) is discussed from both theoretical and experimental point of view. The C-FRP is applied such as to assume an Ω shape around a concrete core realized at the vault extrados. A theoretical prediction of ultimate strength was derived in agreement with the occurrences observed during the experiments (masonry crushing, FRP rupture, debonding, sliding along the mortar joint). So a lower bound limit analysis approach was developed which can handle with the shear strength of each ideal section given by the Mohr-Coulomb friction law (for the mortar joint) and other non linear Italian Code relations (for CFRP Ω-Wrap reinforcement) at a given level of normal compressive stress, resulting from the previous step