Out-of-plane loaded masonry walls retrofitted with oriented strand boards: Numerical analysis and influencing parameters

The computational prediction of the out-of-plane behaviour unreinforced masonry walls is a challenge. However, numerical models may provide, if properly calibrated, powerful tool to predict new retrofit techniques. This paper presents Finite Element (FE) modelling retrofitted with oriented strand boards (OSB) aiming its behaviour. Such measure has been proposed by authors for brick and efficiency demonstrated through experimental studies on small-scale larger-scale specimens (out-of-plane monotonic tests). data gathered in phase used here calibrate FE-based (i.e. non-retrofitted retrofitted). For this purpose, detailed micro-modelling strategy followed assuming perfect bond between mortar joints units. so-called Concrete Damage Plasticity (CDP) model adopted describe constitutive relation OSB timber panel. connection panel modelled elastic anchors. Numerical results show good agreement data, terms observed damage pattern capacity curve (within 10% difference). calibrated instrumental developing parametric analysis study effect different thicknesses, side application retrofit, spacing connections anchor rods. These revealed that system directly proportional thickness steel connectors should be lower than 500 mm an adequate response.