Numerical calibration of a simplified procedure for the seismic behaviour assessment of masonry building aggregates

The paper deals with the numerical calibration of a speedy procedure for evaluating the seismic vulnerability on large scale of masonry building aggregates, which are the typical building blocks diffused within the historical centres of many Italian towns. First of all, based on several FEM analyses developed with the 3MURI analysis software, this simplified assessment procedure has been implemented, it being derived from the well known vulnerability form for masonry buildings integrated by five parameters accounting for the aggregate conditions among adjacent units. Later on, the procedure set-up has been validated by performing a study in the Vesuvius area. Before, it has been applied to a single building aggregate and, considering that the results previously achieved have been again confirmed, subsequently the procedure has been applied to a wide area of the historic centre of Torre del Greco, allowing for the knowledge of the buildings most at risk under earthquake.