THE BORBONE'S SYSTEM: A MULTISCALE MODEL FOR THE BUILDING SEISMIC ANALYSIS (original) (raw)

This paper describes a method designed to assess the seismic capacity of the most ancient Baraccato structural system, identified in the Episcopal Palace of Mileto (VV) in the South of Italy. In particular, the timber-framed system was modelled through a multiscale approach, investigating the in-plane mechanical behaviour of a single Borbone wall on two different scales: the "fine" and the "coarse" ones, with the dual purpose to reproduce the results of some experimental tests and, at the same time, to provide an agile numerical tool for the seismic analysis of an entire building based on this system. To do this, a "micro" and "macro" model are defined, on the basis of specific hypotheses formulated with reference to the experimental evidences. The modelling at the microscopic scale was carried out through a discrete approach, considering all the resistant elements of the wall: timber frame, joints, masonry and interfaces, for each of which a constitutive law was defined. On its part, the modelling at the macroscopic scale represents the first step of a methodology to analyse an entire Borbone building. The equivalent frame approach, largely used for masonry building seismic analysis, is here extended to timber-framed masonry systems.