Damage assessment in single-nave churches and analysis of the most recurring mechanisms after the 2016–2017 central Italy earthquakes

Ceroni, Francesca; Casapulla, Claudia; Cescatti, Elvis; Follador, Veronica; Prota, Andrea; Porto, Francesca da

doi:10.1007/s10518-022-01507-8

Cited by 17 publications

(5 citation statements)

References 24 publications

(32 reference statements)

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“…Finally, vaults are generally vulnerable elements in a church, as they give rise to horizontal thrusts that are often not adequately hindered and because they generally tend to be easily damaged under horizontal actions (Ceroni et al, 2022). However, from the graphs, it would appear that churches without vaults are more vulnerable than those with vaults.…”

Section: Definition Of Factors Influencing the Church Vulnerabilitymentioning

confidence: 99%

Development of a new seismic vulnerability model for churches based on simple typological features

et al. 2023

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The sequence of seismic events occurred in last decades in Italy highlighted the high vulnerability of churches. Since the Umbria–Marche earthquake in 1997, a systematic series of post-earthquake surveys has been carried out. The data collected during those surveys were used to propose first sets of vulnerability and fragility curves. After the three last major earthquakes (L’Aquila 2009, Emilia 2012, Central Italy 2016–2017), other significant series of on-site surveys led to the collection of a large amount of data, both on the damage suffered by churches and their typological characteristics. In this study, a data set of 1127 churches damaged by the 2009 L’Aquila earthquake and the 2016–2017 Central Italy seismic sequence was analyzed. This article presents a new simplified approach to determine vulnerability indexes of churches, in order to obtain vulnerability curves, and then a set of fragility curves, depending on the typological characteristics of the single church. This allows to have a single set of curves with the entire sample and without a typological subdivision. This article first analyzes in detail the available database records to define their representativeness and influence on vulnerability. Then, a series of vulnerability modifiers are defined, pointing out which parameters effectively affect the overall vulnerability. These observations also allow identifying which parameters deserve to be collected onsite, improving the efficiency of future survey campaigns. In conclusion, starting from the vulnerability modifiers, a set of vulnerability and fragility curves are presented.

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Section: Definition Of Factors Influencing the Church Vulnerabilitymentioning

confidence: 99%

Development of a new seismic vulnerability model for churches based on simple typological features

et al. 2023

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“…The Italian territory is characterized by an architectural heritage of great value which needs to be preserved. These aspects lead to a growing interest of the scientific community into assessing the seismic risk of existing masonry churches [1][2][3][4]. The high vulnerability of churches is mainly due to some peculiar structural features, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the out-of-plane failure of the façade has been frequently observed in masonry churches in the aftermath of a seismic event and is, indeed, one of the most representative local mechanisms for a church. In fact, the rocking of façades is the most recurring mechanism in terms of percentage concerning the possible and activated mechanisms, as observed in recent earthquakes [1,5]. Recently, different analytical and numerical approaches were developed to analyze the seismic response of rocking façades [6][7][8][9], also restrained by dissipative devices [10,11] or by optimal economic and environmental retrofitting solutions [12].…”

Section: Introductionmentioning

confidence: 99%

Fragility Curves for Rocking Masonry Façades of Churches: A Sensitivity Study of Vulnerability Parameters

Argiento,

Casapulla,

Ceroni

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Out-of-plane failure of façades is one of the most distinctive local mechanisms in masonry churches recognizable in the aftermath of a seismic event. The purpose of this paper is to derive large-scale fragility curves for masonry church façades using incremental static analysis, and to assess the influence of some parameters on their vulnerability. According to the displacement-based approach, pushover analysis is carried out considering both the geometric nonlinearities and the stabilizing contribution of frictional resistances exerted by the church sidewalls. The seismic demand is derived using acceleration-displacement response spectra (ADRS) for different limit states, obtained according to the Italian seismic code. The analyses are addressed with reference to a large sample of masonry churches generated starting from the geometric parameters of a reduced sample of churches hit by the seismic event of 21 st August 2017 in the Ischia Island (Italy). Several geometric aleatory variables, i.e. the length, the height and the thickness of the façade, are treated by means of the Monte Carlo simulation (MCS) to generate a numerical sample of 400 facades. Considering two limit states for rocking (moderate and severe motion), fragility curves are derived for these facades subjected to the same single ground motion scaled at different values of PGA, using incremental static analysis (ISA) and multiple stripe analysis (MSA). Finally, on the same sample of 400 facades, the sensitivity of the fragility curves to the friction coefficient, the length of masonry units and the position of the façade mass center is investigated.

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“…In this context, many recent studies have been devoted to the damage assessment of masonry churches and towers subjected to seismic events or to collapse mechanisms due to static loads (e.g., [1][2][3][4][5]). In particular, knowledge of the current seismic performance level is crucial for the vulnerability assessment of the historical assets in order to evaluate their structural safety and design appropriate retrofitting strategies.…”

Section: Introductionmentioning

confidence: 99%

Path of Knowledge for the Assessment of Structural Safety of the Pisan Tower of the Royal Palace of Palermo in Italy

Mendola

Accardi²,

Agnello

et al. 2023

Heritage

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This paper presents the path of knowledge developed for assessing the structural safety of the Norman-age Pisan Tower, which is mostly incorporated into the Royal Palace in Palermo, Italy. Historical, geomatic, and mechanical investigations were conducted and the most relevant results are herein collected and presented. The research path was addressed to specific tasks: identification of the building, geometric surveys, recognition of the sequence of phases of building transformation, detection of the components of the load-bearing structure, structural diagnostic surveys, and investigation of the subsoil and foundations. The explicit vulnerabilities found were mostly confined to the Piazzi library floor, while implicit vulnerabilities were identified in the presence of false walls and in high loads and fillings on the vaults of the last levels. The results of the analyses allowed the individuation of the confidence factors to use in structural analysis models aimed at the assessment of the seismic safety of the building.

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Damage assessment in single-nave churches and analysis of the most recurring mechanisms after the 2016–2017 central Italy earthquakes

Cited by 17 publications

References 24 publications

Development of a new seismic vulnerability model for churches based on simple typological features

Development of a new seismic vulnerability model for churches based on simple typological features

Fragility Curves for Rocking Masonry Façades of Churches: A Sensitivity Study of Vulnerability Parameters

Path of Knowledge for the Assessment of Structural Safety of the Pisan Tower of the Royal Palace of Palermo in Italy

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