FE modelling of RC frames with masonry infill panels under in-plane and out-of-plane loading

This paper gives a detailed presentation of a generic three-dimensional discrete-finite-element model that has been constructed for reinforced-concrete frames with masonry infill using ANSYS. Appropriate experimental data available from the literature are utilised to verify the model. The reasons behind some of previously observed damage to infill-frames are given. A simple method is proposed to overcome convergence issues which are related to the Newton–Raphson algorithm. It is shown that the model can be employed to predict the behaviour of the infill-frame over a wide range of drift, and to interpret its response at various stages of in-plane or out-of-plane loading.

► The behaviour of infill-frames under in- and out-of-plane loading is examined.
► The preprocessing phase of FEM is eliminated by using a powerful script/macrofile.
► A simple method is proposed in order to overcome convergence issues.
► The model can predict the behaviour of the infill-frame over a wide range of drift.
► An “adaptive strut model” should be used to represent an infill appropriately.