Strutture lignee di copertura e vulnerabilità sismica

The assessment of the seismic vulnerability is the first step in the decision process concerning strengthening interventions for structures in seismic areas. A methodology for assessing the seismic vulnerability of timber roof structures has been proposed and is outlined here. Among the elements considered for the evaluation are the conceptual design of the structure, the type and state of the timber-to-wall connection, the type and quality of timber carpentry joints, and the general state of conservation. The procedure has been applied to different cases of historical construction, with the main purpose of verifying its effectiveness and devising possible improvements. Some simplifications and some additions to the data collecting step of the procedure have been suggested by this work. While roof structures are mostly seen in their capability of supporting vertical loads, the procedure has given effective guidance in concentrating on the characteristics that affect the seismic response.