Comparing the Observed and Numerically Simulated Seismic Damage: A Unified Procedure for Unreinforced Masonry and Reinforced Concrete Buildings

Angiolilli, Michele; Minkada, Marius Eteme; Domenico, Mariano Di; Cattari, Serena; Belleri, Andrea; Verderame, Gerardo Mario

doi:10.1080/13632469.2022.2096721

Cited by 16 publications

(6 citation statements)

References 98 publications

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“…The mechanical parameters adopted are listed in Table 2 and were based on those calibrated for the Visso's school (Brunelli et al 2021a) through a very accurate numerical simulation of the actual response of this monitored asset. The reliability of those values was also con rmed in Cattari and Angiolilli (2022) and Angiolilli et al (2022). The strength values (τ 0 ) are slightly higher than that used for the school (about 10%), but still consistent with the reference values proposed by MIT (2019) for analogous masonry type.…”

Section: Global In-plane Responsesupporting

confidence: 76%

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

Angiolilli

Brunelli

Cattari

2022

Preprint

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Masonry buildings in aggregate are largely diffused within the existing Italian and European building stock, especially in historical centres. Their seismic evaluation 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 masonry aggregate. The latter consists of five adjacent structural units mutually interacting with each other during seismic sequences. The aggregate is inspired by the unreinforced masonry (URM) built heritage of the historic centre of Visso struck by the Central Italy 2016/2017 earthquakes. It was proved to be negatively affected especially by the site-amplification phenomena. 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. Also an innovative procedure considering the pounding effect to the global response of the building was presented. Two soil conditions were assumed with (freefield) and without (bedrock case) site amplification. In the first case, a site response analysis based on a 1D soil model aimed to reproduce the actual soil profile under the examined aggregate has been carried out. The results showed that site effects strongly affected the seismic vulnerability of the aggregate, also possibly altering the combination between IP and OOP mechanisms with respect to what expected on basis of evidence from other historical centres. More specifically, for bedrock condition, the overall seismic response of the buildings in aggregate was strongly affected by such a combination, especially for medium-high damage levels where 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. The result appears also affected by the architectural configuration of such buildings, characterized by quite large openings at ground floor.

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Section: Global In-plane Responsesupporting

confidence: 76%

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

Angiolilli

Brunelli

Cattari

2022

Preprint

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“…The seismic risk associated with one-storey existing precast buildings has been studied in various works [18,19,20,21,15]. The results obtained confirm the need to implement retrofit interventions to protect working activities and human lives.…”

Section: Introductionmentioning

confidence: 74%

Influence of Cladding Panels Retrofit on the Seismic Risk of an Existing Precast Building

Eteme Minkada,

Bosio,

Belleri

et al. 2023

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

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Recent research and past earthquakes have shown that precast industrial buildings built in Italy up to the 1980s are characterized by a considerable seismic risk, particularly considering inadequate connections between precast elements. It is therefore necessary to implement seismic retrofit interventions both at a local and global level to protect working activities and human lives. In this work, the influence of local interventions, particularly of cladding panels, on the evolution of the seismic risk of a reference precast industrial building is assessed. The effects of the retrofitting interventions were verified by comparing the performance of the retrofitted structure with those of the structure in its current state, by means of multi stripe analyses, in terms of demand-capacity ratio associated with each element and each connection of the structural and non-structural system.

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“…The mechanical parameters adopted are listed in Table 2 and were based on those calibrated for the Visso's school (Brunelli et al 2021) through a very accurate numerical simulation of the actual response of this permanently monitored asset. The reliability of those values was also confirmed in Cattari and Angiolilli (2022) and Angiolilli et al (2022). Some mechanical parameters were slightly modified with respect to those assumed for the Visso's school based on expert judgment and some preliminary sensitivity analyses performed on the aggregate for the aim of the numerical simulation of actual response reported in Brunelli et al (2022a).…”

Section: Global In-plane Responsementioning

confidence: 89%

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

Angiolilli

Brunelli

Cattari

2023

Bull Earthquake Eng

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Comparing the Observed and Numerically Simulated Seismic Damage: A Unified Procedure for Unreinforced Masonry and Reinforced Concrete Buildings

Cited by 16 publications

References 98 publications

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

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

Influence of Cladding Panels Retrofit on the Seismic Risk of an Existing Precast Building

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

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