Numerical study on the performance of improved masonry-to-timber connections in traditional masonry buildings

• The behaviour of injected anchors in masonry was evaluated through a numerical study.
• RCM describes with good agreement the nonlinear behaviour of the system.
• The embedment depth is the parameter that most influences the system response.
• ACI 318, fib and CEB predicted the system strength with good approximation.

This paper deals with a numerical study on the structural performance of masonry-to-timber connections in ancient buildings. The work is supported on an experimental campaign carried out at University of Minho, which aims at characterising a strengthening solution based on the use of injected anchors for the improvement of the connection between masonry and timber frame walls. The numerical study resorts to a detailed 3D finite element model, which reproduces the experimental test setup and procedure. The modelling approach adopted allows an accurate characterisation of the behaviour of all structural elements, in terms of stress field and displacement distribution. The 3D model was validated against the available experimental results, which was then used to perform parametric analyses in order to evaluate the influence of key parameters. Finally, simplified analytical approaches to estimate the strength capacity of injected anchors on masonry are presented and discussed.