Abstract
The current seismic prevention strategy is based on a unitary approach aimed at a risk mitigation, also at territorial level. The Italian guidelines for the assessment and mitigation of seismic risk of cultural heritage provides indications for the seismic analysis of protected cultural heritage, with the aim of specifying a path of knowledge, assessing the level of safety and planning possible improvements. The Italian building heritage is very vast and heterogeneous and was devastated by earthquakes due to its high vulnerability; therefore, the seismic risk mitigation also requires the availability of simple and handy analysis tools. The aim of this paper is the illustration of an easy, although approximate, procedure for the evaluation of the seismic safety index and the optimization of strengthening interventions. The procedure is applied to buildings located in the province of Caserta. The analyses are performed with reference to two types of buildings that are particularly recurrent and representative of the building heritage of this area and placed in areas with different seismic hazard.
Highlights
The Italian building heritage consists of masonry constructions, a wide part of which is located in historic centres, what deserve particular attention as bearers of inestimable values due to their existence over time, which makes it a rich historical, artistic, and cultural environment
The current seismic prevention strategy is based on a unitary approach aimed at a risk mitigation, at territorial level
The Italian National “Guidelines for evaluation and mitigation of seismic risk of cultural heritage” [14] identify different simplified mechanical models aimed at evaluating the seismic risk of most common masonry buildings types such as buildings, palaces and other structures with bearing walls and horizontal diaphragms [22], churches and other structures with large halls [23,24], without intermediate diaphragms [25], towers, bell towers, and other tall and slender structures [26].They are strongly linked to the Italian Building Code [27], recently updated with a new version [28], which contains all the parameters necessary to perform a reliable seismic analysis
Summary
The Italian building heritage consists of masonry constructions, a wide part of which is located in historic centres, what deserve particular attention as bearers of inestimable values due to their existence over time, which makes it a rich historical, artistic, and cultural environment. This issue is as important as extremely complicated, above all due to the presence of an excessive degradation and the low seismic capacity that characterizes these structures [7, 8]. A significant number of old stone and masonry buildings do not comply with any provisions of current codes and have low seismic capacity and in general sophisticated analyses are necessary to assess their vulnerability [16, 17] For all these reasons, is essential to have lean procedures that allow the evaluation of the seismic risk assessment of existing buildings to establish priorities in a long-term prevention policy. The aim of the paper is to provide a first step to reduce the seismic risk of the analysed buildings, through very simple analyses of site and existing buildings
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