Calibration of concrete damaged plasticity materials parameters for tuff masonry types of the Campania area

The masonry buildings represent the largest portion of the Italian building heritage considering that about eighty percent of buildings is made of different kind of masonry. Italian cities are characterized by the presence of numerous masonry buildings of historical and architectural value. It is possible to find a large variety of building techniques and constructional material leading to different masonry structures that need to be precisely characterized as regards the mechanical behaviour. In this paper, the calibration of the materials parameter for an adequate modelling of typical tuff masonry constructive systems spread in Campania region is given. The calibration has been developed reproducing, by FEM analysis, real compression tests performed in displacement control available in literature. In particular, reference is made to masonry with regular ashlars, listed tuff masonry and chaotic tuff masonry. The FEM analyses have been carried out considering the “Concrete Damaged Plasticity” failure criteria. Moreover, the modelling of a wall subjected to horizontal actions has been investigated with reference to solid brick elements and shell to analyse if there is any shape factor affecting the different response. It can be pointed out that the analytical model used for the calibration of uniaxial tension and compression curves shows great adaptability and versatility for each type of masonry.