Strengthening of masonry rings with composite materials

Abstract The paper presents the results of experimental testing six masonry rings built to technical scale and strengthened with CFRP strips sheets also an FRCM system PBO, glass, basalt carbon fibers. were subjected tensile loads induced by four hydraulic jacks. assumption is that are a representative simplification domes, especially their structural support. Both single layered domes ribbed exposed stress in up one third height. During tests, following information was collected: loads, displacements, strains composites failure modes. In some cases, initial prestressing reinforcements carried out. Recommendations limitations related use materials tested for reinforcing round, structures under stresses discussed. criterion choosing best solution not only based on comparing strength reinforcement but its stiffness. A strengthening efficiency index proposed. assessment effectiveness out, taking into account heritage building conservation standards. Adopting EF indicator as assessing reinforcement, it can be concluded application methods should considered maintenance historical buildings: PBO mesh PBO-FRCM system, C-FRCM B-FRCM system.