Investigating the combined role of the structural vulnerability and site effects on the seismic response of a URM school hit by the Central Italy 2016 earthquake

Cattari, Serena; Angiolilli, Michele; Alfano, Sara; Brunelli, Andrea; Silva, Filomena de

doi:10.1016/j.istruc.2022.04.026

Cited by 8 publications

(7 citation statements)

References 49 publications

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“…The values assumed for the drifts and the corresponding strength decay are consistent with experimental data in the literature (Beyer and Dazio, 2012;Vanin et al 2017;Graziotti et al 2018;Rezaie et al 2020). Table 10 lists the main mechanical properties and the nonlinear parameters adopted in the numerical simulations, that have been derived from the aforementioned calibration process and sensitivity analyses carried out by Cattari and Lagomarsino (2013), Degli Abbati et al (2022), Brunelli et al (2021 and Cattari et al (2022a).…”

Section: Overview Of the Numerical Modelssupporting

confidence: 66%

“…The last case study (the Caldarola's one, that was struck during the Central Italy 2016/2017 earthquake) was characterized by the absence of accelerometric stations placed in the municipality as well as the absence of a permanent monitoring system during the seismic event. However, some study on the site amplifications was already conducted in Cattari et al (2022a) and the data from the seismic microzonation study were available (MZS3 2018), ensuring a good potential to well characterize the seismic input.…”

Section: Selection Criteria For the Investigated Buildingsmentioning

confidence: 99%

“…The buildings are instead characterized by different plan configurations, as defined in Table 4, in which are also summarized the general and other geometrical information of the four cases. The detailed description (geometry, material and observed damage) of the San Felice's building, Visso's school and Pizzoli's town hall and Caldarola's school are reported in Cattari and Lagomarsino (2013), Brunelli et al (2021), Degli Abbati et al (2022), Cattari et al (2022a), respectively. In addition, the San Felice's building was selected as a case study in the DT 212 (2013), while Visso's school and Pizzoli's town hall were included in the benchmark cases analyzed in the "Nonlinear URM modelling -Benchmark Project" (Cattari and Magenes 2022) where the results achieved by several modelling strategies were compared in Ottonelli et al (2022), for the Visso's school, and in Degli Abbati et al (2022), for the Pizzoli's town hall.…”

Section: Main Structural and Geometrical Features Of The Selected Bui...mentioning

confidence: 99%

“…Figure 16d-g illustrates the EF models of the four analyzed buildings, where the piers and spandrels are represented in orange and green, respectively. As already mentioned, these models were already developed in previous research and in particular in (Cattari and Lagomarsino 2013;Degli Abbati et al 2022;Brunelli et al 2021;Cattari et al 2022a) for the San Felice's-, Pizzoli's-, Visso's and Caldarola's buildings, respectively.…”

Section: Overview Of the Numerical Modelsmentioning

confidence: 99%

“…A discussion on the sensitivity of the results regarding some of epistemic uncertainties that characterize the modelling process (e.g. the effective height of piers or the effectiveness of the wall-to-wall connection) is described in Ottonelli et al (2020), considering as benchmark case study just the Visso's school; moreover, in Cattari et al (2022a) further exemplifications of parametric analyses addressed to explore the effects of uncertainties on mechanical parameters and softening phase of constitutive laws of piers are illustrated for the Caldarola's school. Indeed, the selected case studies constitute very emblematic examples for investigating also other relevant and tricky issues that may affect the seismic response of existing buildings, such as the soil-structure interaction and cumulative damage due to repeated shocks (for the Visso's school) or the site effect (for Caldarola's school).…”

Section: Overview Of the Numerical Modelsmentioning

confidence: 99%

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Multiscale procedure to assign structural damage levels in masonry buildings from observed or numerically simulated seismic performance

Cattari

Angiolilli

2022

Bull Earthquake Eng

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The damage level (DL) is a fundamental metric in earthquake engineering and is particularly effective for multiple purposes, such as correlating structural damage to consequences and losses (e.g. economic, casualties, etc.) as well as to physical and mechanical variables quantifiable from both experimental and numerical tests. Despite the relevance of the topic, the conversion of complex information on the damage spreading over a 3D building into a synthetic DL remains an open issue for which there are currently no agreed-upon scientific criteria in the literature. Within this context, the study focuses on unreinforced masonry (URM) buildings by providing an analytical multi-scale approach that integrates structural damage at the panel-scale and macro-element size (where the macro-element is intended as an assemblage of components, like vertical walls or diaphragms). The approach is specifically conceived to be applied consistently to both observed and numerically simulated damage. As a result, the method is particularly effective for supporting the validation of numerical models or synthetically interpreting the huge amount of results from nonlinear analyses as much as feasible using an objective basis. The paper proposes a comparison of DL interpretation arising from other approaches in the current literature, highlighting their pros and cons. The effectiveness of the proposed procedure is then assessed using four URM case studies, all of which exhibited primarily a ‘box-like behaviour’. They were specifically chosen based on the extremely detailed documentation available for both the damage and geometric/mechanical features of the buildings as well as aiming to reduce the uncertainty in the seismic input, making them ideal candidates also for validation purposes. To this end, the applicability of the procedure also to the damage simulated by nonlinear dynamic analyses was proven by adopting equivalent frame models of the case studies, developed and calibrated in previous researches. Definitely, the results encourage the adoption of the proposed procedure to interpret as analytically as possible the real damage that occurred on URM building, when accurate damage observations from field surveys are available, as well as that coming from numerical simulations.

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Section: Overview Of the Numerical Modelssupporting

confidence: 66%

Section: Selection Criteria For the Investigated Buildingsmentioning

confidence: 99%

Section: Main Structural and Geometrical Features Of The Selected Bui...mentioning

confidence: 99%

Section: Overview Of the Numerical Modelsmentioning

confidence: 99%

Section: Overview Of the Numerical Modelsmentioning

confidence: 99%

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Multiscale procedure to assign structural damage levels in masonry buildings from observed or numerically simulated seismic performance

Cattari

Angiolilli

2022

Bull Earthquake Eng

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Fragility curves of masonry buildings in aggregate accounting for local mechanisms and site effects

Angiolilli

Brunelli

Cattari

2023

Bull Earthquake Eng

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The seismic evaluation of masonry buildings in aggregate, largely diffused within the existing Italian and European building stock, represents a difficult and open task that has not been exhaustively investigated so far. The study proposes a procedure aimed at evaluating the potential impact of the combination of local mechanisms and site-amplification in terms of fragility curves on an existing unreinforced masonry (URM) aggregate which is made of five adjacent structural units mutually interacting with each other during seismic sequences. The case study is inspired by built heritage of the historic centre of Visso struck by the Central Italy 2016/2017 earthquakes. The in-plane (IP) response of URM buildings was simulated through nonlinear dynamic analyses performed on a 3D equivalent frame model of the structure, whereas out-of-plane (OOP) mechanisms were analysed by adopting the rigid-block assumption but assuming, as seismic input, the floor accelerations derived from the post-processing of data derived from the global 3D model. An innovative procedure considering the pounding effect to the global response of the building is also presented. Two soil conditions were assumed with (freefield) and without (bedrock) site amplification. The results showed that site effects strongly affected the seismic vulnerability of the aggregate, also altering the combination between IP and OOP mechanisms. In fact, for bedrock condition, especially for medium–high damage levels, local mechanisms were prevailing with respect to the IP response. Conversely, for freefield condition, IP mainly governed the overall behaviour for all the damage levels, consistently with the field evidence.

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Quasi-static cyclic tests and numerical study of seismic performance of confined masonry walls reinforced with horizontal steel bars

Yang,

Zhou

et al. 2023

Structures

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Investigating the combined role of the structural vulnerability and site effects on the seismic response of a URM school hit by the Central Italy 2016 earthquake

Cited by 8 publications

References 49 publications

Multiscale procedure to assign structural damage levels in masonry buildings from observed or numerically simulated seismic performance

Multiscale procedure to assign structural damage levels in masonry buildings from observed or numerically simulated seismic performance

Fragility curves of masonry buildings in aggregate accounting for local mechanisms and site effects

Quasi-static cyclic tests and numerical study of seismic performance of confined masonry walls reinforced with horizontal steel bars

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