Methodologies for the vulnerability analysis of historic centres in Italy

摘要

During the last few decades several approaches to the study of the vulnerability of historic centres have been proposed by different research groups in the Mediterranean countries under the seismic risk. The aim is to (ⅰ) provide the responsible authorities with information and parameters for the most appropriate vulnerability analysis methods, (ⅱ) support the designers in their repair and prevention projects. As an example to clarify the results reached by the research, a methodology proposed within a research supported by the Protection Department of the Italian Minister Council is presented. The approach is proposing an investigation on site and in a laboratory based on a "minimal" low cost program. The knowledge of existing buildings is approached by considering different levels of analysis. The methodology, calibrated on four historic centres situated in Umbria (Italy), allowed us to define an abacus of the typical collapse mechanisms which can be used for analytical methods based on the application of single or combined kinematic models involving the equilibrium of macro-elements.