Fabric-reinforced　cementitious　matrix　(FRCM)　composites,　also　known　as　textile-reinforced　mortars　(TRMs),　represent　a　new　advancement　in　structural　repair　and　reinforcement　technology.　Aiming　to　improve　the　energy　efficiency　and　seismic　performance　of　existing　buildings,　this　research　focused　on　the　development　of　an　FRCM　system　in　combination　with　phase　change　materials　(PCMs)　and　extruded　polystyrene　sheets　(XPS)　to　achieve　adequate　mechanical　and　thermal　properties　for　reinforced　concrete　(RC)　and　masonry　structures.　Accordingly,　the　in-plane　behaviour　of　five　FRCM-strengthened　RC　frames　with　hollow-brick　wall　infill　was　tested　under　cyclic　loading　to　investigate　the　improvement　in　earthquake　resistance.　The　system　was　comprehensively　evaluated　by　calculating　hysteresis　curves;　comparing　the　lateral　stiffness,　ductility,　and　energy　dissipation　capacity;　measuring　the　deformations　of　the　specimens;　and　analysing　the　failure　modes　mechanically.　Finally,　it　was　proved　that　this　novel　integrated　approach　could　significantly　enhance　the　mechanical　and　seismic　performance　of　masonry-infilled　RC　frames.