Comparative analysis of numerical discrete and finite element models: the case of in-plane loaded periodic brickwork

The use of refined models for investigating the in-plane behavior of periodic brickwork is an active field of research. A key aspect in modeling periodic brickwork is the identification of an appropriate scale of analysis suited for the effective characterization of the mechanical properties of structure. With this purpose, different models will be defined to simulate, with an appropriate accuracy, the behavior of masonry. Here, a comparison between a Discrete Element Method (DEM) and a combined Finite Element and Discrete Element Method (FEM/DEM) is performed. DEM and FEM models start from different assumptions and envisage different fields of application. The synergic development of the comparative analysis of two numerical models together with a reliable analysis allows developing a specific strategy suitable for investigating historical masonries (periodic brickwork) with a twofold aim: to calibrate the models at the beginning in a linear elastic field such as to propose a perspective dynamic analysis and to carry out a nonlinear analysis.