Numerical insights on the seismic risk of confined masonry towers

Bartoli, Gianni; Betti, Michele; Galano, Luciano; Zini, Giacomo

doi:10.1016/j.engstruct.2018.10.001

Cited by 43 publications

(15 citation statements)

References 32 publications

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“…For the non-linear static numerical analyses of EL3, the elastic properties of masonry (E and G) are derived from a tailored assessment based on a dynamic identification, while the values of non-linear parameters of the numerical models are chosen in light of a critical study of values experimentally obtained by other authors for similar masonry types (Bartoli et al 2013(Bartoli et al , 2019. This choice is dictated by the fact that the visual investigation of the masonry, together with the comparison with the parameters experimentally determined for the nearby Torre Grossa (Bartoli et al 2013), suggested the use of strength parameters values higher than the ones proposed by MIT (2009).…”

Section: Mechanical Parametersmentioning

confidence: 99%

“…Given its complex setting, with surrounding buildings, the Cugnanesi tower represents a comprehensive reference case for the critical discussion of the framework set up by the IG. Indeed, even if the scientific literature has produced robust approaches for the systematic seismic assessment of masonry towers, the proper evaluation of the effects of the interaction between the tower and its connected lower structures, when the tower is not an isolated structure, is still an open question (Bartoli et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Analytical and numerical seismic assessment of heritage masonry towers

Torelli

D’Ayala

Betti

et al. 2019

Bull Earthquake Eng

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The new Italian building code, published in 2018 [MIT in NTC 2018: D.M. del Ministero delle Infrastrutture e dei trasporti del 17/01/2018. Aggiornamento delle Norme Tecniche per le Costruzioni (in Italian), 2018], explicitly refers to the Italian "Guidelines for the assessment and mitigation of the seismic risk of the cultural heritage" [PCM in DPCM 2011: Direttiva del Presidente del Consiglio dei Ministri per valutazione e riduzione del rischio sismico del patrimonio culturale con riferimento alle norme tecniche per le costruzioni, G.U. n. 47 (in Italian), 2011] as a reliable source of guidance that can be employed for the vulnerability assessment of heritage buildings under seismic loads. According to these guidelines, three evaluation levels are introduced to analyse and assess the seismic capacity of historic masonry structures, namely: (1) simplified global static analyses; (2) kinematic analyses based on local collapse mechanisms, (3) detailed global analyses. Because of the complexity and the large variety of existing masonry typologies, which makes it particularly problematic to adopt a unique procedure for all existing structures, the guidelines provide different simplified analysis approaches for different structural configurations, e.g. churches, palaces, towers. Among the existing typologies of masonry structures there considered, this work aims to deepen validity, effectiveness and scope of application of the Italian guidelines with respect to heritage masonry towers. The three evaluation levels proposed by the guidelines are here compared by discussing the seismic risk assessment of a representative masonry tower: the Cugnanesi tower located in San Gimignano (Italy). The results show that global failure modes due to local stress concentrations cannot be identified if only simplified static and kinematic analyses are performed. Detailed global analyses are in fact generally needed for a reliable prediction of the seismic performance of such structures.

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Section: Mechanical Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical and numerical seismic assessment of heritage masonry towers

Torelli

D’Ayala

Betti

et al. 2019

Bull Earthquake Eng

Self Cite

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“…To date, there have been conspicuous advances in simulating the response of ancient masonry structures, mainly with the aim of determining the ultimate vertical loads and capacity with respect the lateral seismic actions. For example, among other studies, modeling criteria for ancient bridges may be found in Laterza et al (2017b) andD'Amato et al (2017), while for ancient churches they are reported in Pelà et al (2009); Formisano and Marzo (2017); Betti et al (2018);D'Amato et al (2018), Formisano et al (2018); Fuentes et al (2019); Ramirez et al (2019), and Lopez et al (2019), and they are discussed for towers in Shakya et al (2016); Bartoli et al (2018) and Sarhosis et al (2018). Models of general historical buildings are discussed in Caprili et al (2017) and Milani et al (2018), while detailed study on in-situ tests may be found, among the others, in Krstevska et al (2010); Bartoli et al (2013), and Luchin et al (2018).…”

Section: Introductionmentioning

confidence: 99%

Fatigue Assessment and Deterioration Effects on Masonry Elements: A Review of Numerical Models and Their Application to a Case Study

Casamassima

D’Amato

2019

Front. Built Environ.

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Safety assessment with respect to seismic and vertical loads of existing and very old masonry structures is currently a central topic for the scientific engineering community. In particular, there are many ancient bridges still in service that are subjected to higher and more frequent cyclic loads. For these structures, it is important to determine the actual fatigue strength, rather than the ultimate carrying capacity. In this way the remaining service life, with possible traffic load limitations, may be estimated. This paper reports an updated review of the state-of-the art on recently published fatigue models that account for deterioration effects under cyclic loads. In addition, results related to fatigue performance of a bridge are shown and comments are provided. The numerical comparisons among existing fatigue models reveal that the application of the available fatigue models is particularly problematic for ancient masonry elements, where appropriate stress-life curves are required.

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“…From both the analysis (modal, pushover, and non-linear dynamic) and the comparison with the existing damage, it was concluded that the presence of adjacent structural elements influence the seismic behavior of the tower and modify the tower's crack pattern. In addition, the numerical assessment of the seismic risk of the Chigi tower in San Gimignano (Italy) was presented by Bartoli et al (2019), where the presence of a continuous constraint on three sides not only may reduce the effective slenderness and the period but might also produce local stress concentration and pounding phenomena. Three different levels of investigation and resolution were used according to the Italian guidelines.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of Aggregated Buildings With Different Floor Systems and Their Finite Element Modeling

Stavroulaki

2019

Front. Built Environ.

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The aim of this research is to propose a way of simulating the interaction between aggregated masonry buildings for the finite element analysis. In most cases, the stiffness of adjacent structures is difficult to evaluate due to the unavailability of data on unknown geometry, parameters, materials, and so on; therefore, a parametric study was essential to simulate the restrictions which are developed. The first results of this research are presented in the present paper, through two case studies wherein rod elements or elastic foundations are proposed for the support of an adjacent structure. The natural frequencies of the real building complex are estimated by the finite element modeling of all the structures, which is then used for the dynamic identification of the simplified model. The experimental measurements of the natural frequencies and modes of the building which are studied could be used for the dynamic identification of the finite element model.

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Numerical insights on the seismic risk of confined masonry towers

Cited by 43 publications

References 32 publications

Analytical and numerical seismic assessment of heritage masonry towers

Analytical and numerical seismic assessment of heritage masonry towers

Fatigue Assessment and Deterioration Effects on Masonry Elements: A Review of Numerical Models and Their Application to a Case Study

Dynamic Behavior of Aggregated Buildings With Different Floor Systems and Their Finite Element Modeling

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