Dynamic identification of historic masonry towers through an expeditious and no-contact approach: Application to the “Torre del Mangia” in Siena (Italy)

Pieraccini, Massimiliano; Dei, Devis; Betti, Michele; Bartoli, Gianni; Tucci, Grazia; Guardini, Nadia

doi:10.1016/j.culher.2013.07.006

Cited by 100 publications

(41 citation statements)

References 17 publications

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“…On the other hand, recent advanced studies on masonry monumental buildings, see for instance [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], seem to indicate that, to have an insight into the structural behavior of such complex structures, a broad blend of different analyses should be used, ranging from standard eigen-frequency ones, passing through kinematic limit and pushover analyses, and ending with non-linear dynamic analyses. Such a comprehensive numerical procedure seems also suggested and confirmed by European and Italian codes [23][24][25][26].…”

Section: Numerical Simulations and Constitutive Model For Masonrymentioning

confidence: 99%

The narthex of the Church of the Nativity in Bethlehem: A non-linear finite element approach to predict the structural damage

Milani

Valente

Alessandri

2018

Computers & Structures

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Keywords:Masonry Church of the Nativity Narthex FE model Non-linear dynamic analysis Vault a b s t r a c tThe Church of the Nativity in Bethlehem has a narthex in the front that is as long as the façade of the Church and about six meters wide. Currently, the narthex is covered by five cross vaults, three of which in a dangerous state of decay, and it is internally divided by three walls perpendicular to the façade, which appears to be strongly rotated outwards with a maximum horizontal top displacement of about 40 cm. Inside the central cross vault, the narthex has been heavily damaged and propped since the thirties of the last century. Numerous attempts have been made over the time to identify the causes of such damage. Some archival researches, in-situ inspections of the subsoil and detailed laser scanner surveys, which were carried out during the recent restoration works in the Church and in the narthex, allowed for gaining a deeper insight into the construction features of the cross vaults and for putting forward some hypotheses about the possible causes of damage. This paper provides a scientific validation of these hypotheses by means of finite element numerical simulations, which try to reproduce the seismic response of the Church and the deformation process of a three-dimensional simplified model of the narthex from an assumed initial configuration up to an ultimate state of damage, comparable with the current one. Such models are discretized by means of tetrahedron elements obeying a damage plasticity law that exhibits a softening behavior in both tension and compression. The numerical simulations carried out provide some results that fit reasonably with the actual deformed configuration of the narthex and can be considered as a useful tool for further insights.

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Section: Numerical Simulations and Constitutive Model For Masonrymentioning

confidence: 99%

The narthex of the Church of the Nativity in Bethlehem: A non-linear finite element approach to predict the structural damage

Milani

Valente

Alessandri

2018

Computers & Structures

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“…The researches range from investigation surveys and experimental works (Binda et al 2005;Ivorra et al 2009;Anzani et al 2010;Russo et al 2010;Bartoli et al 2013) to dynamic identification studies (Ivorra and Pallarés 2006;Gentile and Saisi 2007;Ramos et al 2010;Pieraccini et al 2014). With respect to the experimental activities, in some cases, starting from a field survey of the actual configuration including (if present) the cracking pattern, nondestructive tests (e.g., dynamic tests, sonic pulse velocity tests, thermography, etc.)…”

Section: State Of the Artmentioning

confidence: 99%

Seismic Risk Assessment of Historic Masonry Towers: Comparison of Four Case Studies

Bartoli

Betti

Monchetti

2017

J. Perform. Constr. Facil.

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This paper focuses on the seismic risk assessment of historic masonry towers according to the Italian "Guidelines for the Assessment and Mitigation of the Seismic Risk of the Cultural Heritage." The latter identifies a methodology of analysis based on three different levels of evaluation, according to increasing requirements on the structural knowledge: LV1 (analysis at territorial level), LV2 (local analysis), and LV3 (global analysis). Regardless of the methodology of analysis, the more advanced the achieved level of knowledge, the higher the reliability of these approaches becomes. In this field, a fundamental task is the estimation of the uncertain parameters (both material properties and boundary conditions) affecting the structural behavior. The effect of these uncertainties on the global structural response is herein approached through the discussion of an illustrative case study of some of the historic masonry towers in the city center of San Gimignano (Siena, Italy). The seismic risk of these towers was analyzed in the framework of Seismic Risk of Monumental Buildings (RiSEM is the Italian acronym), a research project granted by the Tuscany Regional Administration, and this paper summarizes the results obtained for two of the preceding three levels, which highlights a few issues concerning the seismic risk of historic masonry towers. Useful conclusions are drawn in order to quantify, when performing an LV3 approach through nonlinear models, the effects of the uncertainties on the seismic risk evaluation of such structural typology. The paper, in particular, confirms once more how strongly the effect of confinement reflected on tower seismic performances and stresses that specific attention should be paid to the definition of the effective portion of the structure to be considered as confined (with respect to adjacent buildings).

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“…For historical structures characterised by complex geometry, the state of the art includes cases that show how starting with a 3D laserscanner survey allows for a detailed orientation phase that is also rapid with respect to the amount of data acquired; it is also useful in structural analysis based on FEM models [9], [10], [11].…”

Section: Introductionmentioning

confidence: 99%

An integrated survey experience for assessing the seismic vulnerability of Senigallia's Fortress (Italy): documentation for conservation and FEM modeling

Meschini¹,

Leoni²,

Petrucci³

et al. 2015

2015 Digital Heritage

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The paper presents the results of research carried out by an interdisciplinary team at the SAD in Ascoli Piceno in collaboration with MiBACT to verify the seismic safety of national museums. The object of study was the Rocca Roveresca Fortress complex in Senigallia (Marche, Italy), a unique example of a small 14th-century fortress shaped by a series of successive modifications. It currently houses a national museum. An integrated survey based on the acquisition of 3D laser-scanner data and endoscopic investigation was necessary to outline the traces of the stratifications and therefore to obtain different highand low-poly 3D models useful for different purposes. The main objective was to propose an ideal workflow in developing 3D models that are useful for finite element method (FEM) analysis to detect hidden vulnerabilities in the fortress by evaluating the behaviour of several substructures in the walls.

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Dynamic identification of historic masonry towers through an expeditious and no-contact approach: Application to the “Torre del Mangia” in Siena (Italy)

Cited by 100 publications

References 17 publications

The narthex of the Church of the Nativity in Bethlehem: A non-linear finite element approach to predict the structural damage

The narthex of the Church of the Nativity in Bethlehem: A non-linear finite element approach to predict the structural damage

Seismic Risk Assessment of Historic Masonry Towers: Comparison of Four Case Studies

An integrated survey experience for assessing the seismic vulnerability of Senigallia's Fortress (Italy): documentation for conservation and FEM modeling

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