The use of Fiber Reinforced Polymer (FRP) materials has proved to be one of the most exciting and effective technologies for external strengthening of masonry structures. The present study, part of the collaboration project between the University of Missouri – Rolla and University of Padua, investigates in-plane and out-of-plane load conditions applied to different constructive typologies of FRP strengthened masonry panels. From an interesting investigation on an in field application new ideas emerged to improve the structural effectiveness and appearance of FRP based reinforcement approaches. The successive laboratory experimental program includes a preliminary material characterization, bonding investigations and coupon wall testing. Diagonal compression and flexural tests are performed on clay and concrete masonry wallettes in order to identify the influence of different combinations of FRP reinforcement systems. Parameters such as strengthening set-up, anchoring details, installation and strip width are evaluated.

Original failure mechanisms are modified, increasing noticeably ultimate capacities and introducing semi-ductile behaviors. Some specimens subjected to shear load cycles present high levels of energy-dissipation and remarkable post-damage load bearing capacity.

A new technology consisting in embedding composite rods into mortar joints following a specific procedure, called FRP “Structural Repointing”, introduces aesthetic and rapid application advantages. Proposed as a reinforcement system to solve shear, flexural, and creep problems, suitable for load bearing walls as well as façades, this technology can be combined with FRP laminates when hybrid systems are required on particular surfaces.

Detailed finite element models are implemented: from the material characterization non linearity and frictional behaviors are introduced to describe failure mechanisms, stress and strain redistributions and predict ultimate capacities.

As result of the present work, design guidelines are proposed for applications of FRP Structural Repointing in flexural and shear strengthening of masonry.