Abstract
Seismic risk assessment at the territorial level is now widely recognised as essential for countries with intense seismic activity, such as Italy. Academia is called to give its contribution in order to synergically deepen the knowledge about the various components of this risk, starting from the complex evaluation of vulnerability of the built heritage. In line with this, a mechanics-based seismic fragility model for Italian residential masonry buildings was developed and presented in this paper. This model is based on the classification of the building stock in macro-typologies, defined by age of construction and number of storeys, which being information available at national level, allow simulating damage scenarios and carrying out risk analyses on a territorial scale. The model is developed on the fragility of over 500 buildings, sampled according to national representativeness criteria and analysed through the Vulnus_4.0 software. The calculated fragility functions were extended on the basis of a reference model available in the literature, which provides generic fragilities for the EMS98 vulnerability classes, thus obtaining a fragility model defined on the five EMS98 damage states. Lastly, to assess the reliability of the proposed model, this was used to simulate damage scenarios due to the 2009 L’Aquila earthquake. Overall, the comparison between model results and observed damage showed a good fit, proving the model effectiveness.
Highlights
Is historically one of the European countries with the highest seismic activity and related number of victims, around 160,000 in the last two centuries
The residential URM heritage was divided into ten macro-typologies, defined by age of construction and number of storeys, which are information gathered at national level by means of census and made available by the Italian National Institute of Statistics (ISTAT). This model is calibrated on the fragility of over 500 buildings, sampled on the basis of representativeness criteria at national level and from a large database of information on historic buildings, which has been collected over the years by our research group with traditional survey methods
A mechanics-based seismic fragility model was developed and proposed for territorialscale vulnerability assessment of the Italian residential masonry heritage. This model is based on the classification of the masonry building stock in ten macro-typologies, defined by age of construction and number of storeys, which are information available at national level
Summary
Is historically one of the European countries with the highest seismic activity and related number of victims, around 160,000 in the last two centuries (with 85,000 victims in the 1908 Messina earthquake of magnitude Mw 7.1). Analytical methods can increasingly rely on innovative sensing technologies (e.g., aerophotogrammetry, Google Maps, drones, remote sensing etc.), allowing the collection of numerous data remotely with considerable time savings (Vona et al 2017; Fabris et al 2013), and on innovative methods of statistical inference, allowing to derive all the parameters necessary to define the structural models on the basis of a few main measured characteristics (Campostrini et al 2017; Taffarel et al 2018) In this context, the present work aimed to derive a novel mechanics-based fragility model for territorial-scale vulnerability assessment of the Italian residential masonry buildings.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
