Damages to masonry churches after 2016–2017 Central Italy seismic sequence and definition of fragility curves

Cescatti, Elvis; Salzano, Piera; Casapulla, Claudia; Ceroni, Francesca; Porto, Francesca da; Prota, Andrea

doi:10.1007/s10518-019-00729-7

Cited by 53 publications

(50 citation statements)

References 36 publications

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“…To obtain fragility curves in terms of I MCS , correlation formulas between the PGA and I MCS have been adopted. Different formulations are given in literature, all expressed in the form: used for correlating PGA with I MCS are available in literature which provide comparable results (Faenza and Michelini, 2010;Cescatti et al 2020). In Fig.…”

Section: Correlation With Mercalli-cancani-sieberg Scalementioning

confidence: 93%

Fragility curves for Italian URM buildings based on a hybrid method

Sandoli

Lignola

Calderoni

et al. 2021

Bull Earthquake Eng

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A hybrid seismic fragility model for territorial-scale seismic vulnerability assessment of masonry buildings is developed and presented in this paper. The method combines expert-judgment and mechanical approaches to derive typological fragility curves for Italian residential masonry building stock. The first classifies Italian masonry buildings in five different typological classes as function of age of construction, structural typology, and seismic behaviour and damaging of buildings observed following the most severe earthquakes occurred in Italy. The second, based on numerical analyses results conducted on building prototypes, provides all the parameters necessary for developing fragility functions. Peak-Ground Acceleration (PGA) at Ultimate Limit State attainable by each building’s class has been chosen as an Intensity Measure to represent fragility curves: three types of curve have been developed, each referred to mean, maximum and minimum value of PGAs defined for each building class. To represent the expected damage scenario for increasing earthquake intensities, a correlation between PGAs and Mercalli-Cancani-Sieber macroseismic intensity scale has been used and the corresponding fragility curves developed. Results show that the proposed building’s classes are representative of the Italian masonry building stock and that fragility curves are effective for predicting both seismic vulnerability and expected damage scenarios for seismic-prone areas. Finally, the fragility curves have been compared with empirical curves obtained through a macroseismic approach on Italian masonry buildings available in literature, underlining the differences between the methods.

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Section: Correlation With Mercalli-cancani-sieberg Scalementioning

confidence: 93%

Fragility curves for Italian URM buildings based on a hybrid method

Sandoli

Lignola

Calderoni

et al. 2021

Bull Earthquake Eng

View full text Add to dashboard Cite

show abstract

“…The methodologies for assessing the seismic vulnerability of buildings use different approaches (empirical, analytical, hybrid); they are based on the purposes of the analysis and the various levels of detail of the information available on the morphological-structural features of the buildings. Empirical methods refer to the observed damage and express the seismic vulnerability of building types through: (i) Damage Probability Matrices (DPM) [27][28][29][30][31][32]; (ii) analytical methods, which perform numerical analyses applied to a mechanical model of a building (capacity spectrum and collapse mechanism-based methods) [33][34][35][36][37][38]; (iii) hybrid procedures, which combine aspects of both previous methods based on the expert judgment and on simulated analytical damage statistics for the definition of vulnerability and fragility functions [39].…”

Section: Large-scale Seismic Vulnerability Assessment Methods: a New mentioning

confidence: 99%

A Multilevel Procedure at Urban Scale to Assess the Vulnerability and the Exposure of Residential Masonry Buildings: The Case Study of Pordenone, Northeast Italy

et al. 2020

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More than the 60% of the Italian residential building stock had already been built by 1974, when seismic codes were enforced on a minimal part of the country. Unreinforced masonry buildings represent most of that share, but they are typical for each region, in terms of both materials and structural configurations. The definition of ‘regional’, i.e., more specific, vulnerability and exposure models are required to improve existing forecast models. The research presents a new geographic information system (GIS)-based multilevel procedure for earthquake disaster prevention planning at urban scale; it includes multicriteria analysis, such as architectural types, structural vulnerability analysis, microzonation studies, and socio-economic aspects. The procedure has been applied to the municipality of Pordenone (PN), a district town of the Friuli–Venezia–Giulia region, in Northeast Italy. To assess the urban seismic risk, more than 5000 masonry residential buildings were investigated and common types within sub-municipal areas and exposure data were collected. Simplified mechanical analysis provided a ‘regional’ vulnerability model through typological fragility curves. The integration of results into GIS tool permitted the definition of cross-mapping among vulnerability, damage scenarios (conditional and unconditional) and exposure (seismic losses, casualties, impact), with respect to various earthquake intensities expected in the town. These results are presented at different scales: from the single building, to submunicipal area and to the entire town.

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“…Some models are available in the literature, due to the interest aroused after the extensive damage survey in Umbria-Marche earthquake, 1997 (Lagomarsino and Podestà 2004). Vulnerability models have been proposed, mainly based on the empirical approach and considering the macroseismic intensity as intensity measure (Guerreiro et al 2000;da Porto et al 2012;Leite et al 2013;Sorrentino et al 2014;De Matteis et al 2016;Marotta et al 2018;Penna et al 2019;Lagomarsino et al 2019;Canuti et al 2019;Cescatti et al 2020). Fragility curves may be derived from these models, analogously to what was done for the residential buildings (Lagomarsino et al 2021).…”

Section: Seismic Risk Analysis Of Special Buildings: Schools and Churmentioning

confidence: 99%

Towards the updated Italian seismic risk assessment: exposure and vulnerability modelling

Masi

Lagomarsino

Dolce

et al. 2021

Bull Earthquake Eng

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Within the 2019–2021 research agreement between the Civil Protection Department (DPC) and the Network of University Laboratories for Earthquake Engineering (ReLUIS), the work package WP4 “Seismic Risk Maps—MARS” is specifically devoted to update the 2018 release of the Italian National Seismic Risk Assessment. To this end, the previously considered models of hazard, exposure and vulnerability will be critically reviewed and updated by taking advantage also from the results deriving from other WPs of the DPC-ReLUIS research project. In the present paper some of the most relevant aspects that are being introduced in the development of the new Italian risk maps have been described and shortly analysed. First, a significant upgrade of the vulnerability model implemented in the new version of the platform used for risk calculation (IRMA) is proposed, where reference to the six EMS-98 classes is made also considering regional vulnerability features. Further, empirical data from observed real damage are integrated with results from numerical simulations (mechanical approach), in particular for reinforced concrete buildings. Finally, some special construction types such as schools, churches and bridges are included in order to provide a more comprehensive view of the national risk.

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Damages to masonry churches after 2016–2017 Central Italy seismic sequence and definition of fragility curves

Cited by 53 publications

References 36 publications

Fragility curves for Italian URM buildings based on a hybrid method

Fragility curves for Italian URM buildings based on a hybrid method

A Multilevel Procedure at Urban Scale to Assess the Vulnerability and the Exposure of Residential Masonry Buildings: The Case Study of Pordenone, Northeast Italy

Towards the updated Italian seismic risk assessment: exposure and vulnerability modelling

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