Creep of an FRP-strengthened metallic beam under cyclic temperature and cyclic load

Metallic beams can be strengthened using fibre reinforced polymer (FRP) plates that are adhesively bonded to their soffit. This relies critically upon the adhesive joint, and because adhesives viscoelastic it is known creep at warm services temperatures potentially result in large slips reduce effectiveness of strengthening. paper examines impact performance an FRP-strengthened metallic beam when subjected daily temperature cycles load cycles. A finite element (FE) study was conducted incorporates a linear constitutive model for adhesive, up 50 years were considered, behaviour examined. Differential thermal expansion between FRP plate shown significant results both (a) additional instantaneous shear stress across joint (b) due sustained differential further An equivalent cumulative time approach demonstrated predict response without need complex cyclic analysis. • Examines on beam. The creeps affects creep, as well stresses. study, incorporating experimentally-derived model. determined by approach.