Discontinuous approaches for nonlinear dynamic analyses of an ancient masonry tower

Ferrante, Angela; Loverdos, Dimitri; Clementi, Francesco; Milani, Gabriele; Formisano, Antonio; Lenci, Stefano; Sarhosis, Vasilis

doi:10.1016/j.engstruct.2020.111626

Cited by 74 publications

(22 citation statements)

References 24 publications

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“…A roman arch in France was modelled by Rafiee & Vinches [55], and the mechanical behaviour of a masonry tower was captured by Ferrante et al. [56], using the Non-Smooth Contact Dynamics Method.…”

Section: Most Promising Modern Methodsmentioning

confidence: 99%

Statics of fan vaulting: current state of knowledge and open issues

Bagi

2021

Proc. R. Soc. A.

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Fan vaults, the most spectacular structural form of the English Gothic architecture, has been admired by architect lovers for many centuries. The mechanics of fan vaulting raises several interesting questions, most of which are still unanswered, even though the maintenance and restoration of historic buildings would require the deep understanding how these fascinating structures work, how they respond to mechanical effects and how they carry their loads. The last major study on fan vaulting was published four decades ago, still in 1980, and since then there were only a few publications about the topic, rare and rather scattered. On the other hand, several modern methods were born since then which could advantageously be used for the analysis of the mechanics of fan vault. This paper gives an overview on the history and constructional types of fan vaults, then introduces what we know today about their statics; shortly introduces the most important modern calculation methods that are potentially usable for such studies and gives a list of open issues worthy of investigating.

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Section: Most Promising Modern Methodsmentioning

confidence: 99%

Statics of fan vaulting: current state of knowledge and open issues

Bagi

2021

Proc. R. Soc. A.

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“…As for nonlinear dynamic analyses, there are several numerical methods that allow to evaluate the structural response employing FEM with different constitutive relationships (e.g., Concrete Damage Plasticity (CDP), Total strain-based crack (TSC)), discontinuous methods (e.g., Non-Smooth Contact Dynamics (NSCD), Discrete Element Method (DEM)) (Clementi et al 2019;Clementi 2021;Ferrante et al 2021) and Discrete Macro-Element Modeling (DMEM) (Chácara et al 2019). One of the better performing approaches appears to be the nonlinear dynamic analysis of the walls considered as rocking rigid blocks.…”

Section: Introductionmentioning

confidence: 99%

Fragility functions for local failure mechanisms in unreinforced masonry buildings: a typological study in Ferrara, Italy

Nale

Minghini

Chiozzi

et al. 2021

Bull Earthquake Eng

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Unreinforced masonry buildings undergoing seismic actions often exhibit local failure mechanisms which represent a serious life-safety hazard, as recent strong earthquakes have shown. Compared to new buildings, older unreinforced masonry buildings are more vulnerable, not only because they have been designed without or with limited seismic loading requirements, but also because horizontal structures and connections amid the walls are not always effective. Also, Out-Of-Plane (OOP) mechanisms can be caused by significant slenderness of the walls even if connections are effective. The purpose of this paper is to derive typological fragility functions for unreinforced masonry walls considering OOP local failure mechanisms. In the case of slender walls with good material properties, the OOP response can be modeled with reference to an assembly of rigid bodies undergoing rocking motion. In particular, depending on its configuration, a wall is assumed either as a single rigid body undergoing simple one-sided rocking or a system of two coupled rigid bodies rocking along their common edge. A set of 44 ground motions from earthquake events occurred from 1972 to 2017 in Italy is used in this study. The likelihood of collapse is calculated via Multiple Stripe Analysis (MSA) from a given wall undergoing a specific ground motion. Then, the single fragility functions are suitably combined to define a typological fragility function for a class of buildings. The procedure is applied to a historical aggregate in the city center of Ferrara (Italy) as a case study. The fragility functions developed in this research can be a helpful tool for assessing seismic damage and economic losses in unreinforced masonry buildings on a regional scale.

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“…Another studied area is the Information and Communication Technology (ICT) applied to the dissemination of knowledge of historical buildings, including all the potentials of Augmented Reality/Virtual Reality/Mixed Reality Virtual Reality (VR) opens up to data collected and georeferenced at various scales of definition and detail, while Augmented Reality (AR) allows the visit of architecture while enjoying additional information placed next to the real physical element and Immersive Reality (IR) allows an immersive journey into architecture, collecting scattered elements or remote worlds. In the structural field, two are the reliable approaches to study the historical masonry buildings: Finite Element Models (FEM) (Acito et al, 2014;Giordano et al, 2019) and Discrete Element Models (DEM) (Clementi et al, 2018;Ferrante et al, 2021). The first is most used since it requires less modeling and computational times.…”

Section: Introductionmentioning

confidence: 99%

Point Cloud Exploitation for Structural Modeling and Analysis: A Reliable Workflow

Lucidi

Giordano

Clementi

et al. 2021

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. The digitization and geometric knowledge of the historical built heritage is currently based on point cloud, that rarely or only partially is used as digital twin for structural analysis. The present work deals with historical artefacts survey, with particular reference to masonry structures, aimed to their structural analysis and assessment. In detail, the study proposes a methodology capable of employing semi-directly the original data obtained from the 3D digital survey for the generation of a Finite Element Model (FEM), used for structural analysis of masonry buildings.The methodology described presents a reliable workflow with twofold purpose: the improvement of the transformation process of the point cloud in solid and subsequently obtain a high-quality and detailed model for structural analyses.Through the application of the methodology to a case study, the method consistency was assessed, regarding the smoothness of the whole procedure and the dynamic characterization of the Finite Element Model. The main improvement in respect with similar or our previous workflows is obtained by the introduction of the retopology in data processing, allowing the transformation of the raw data into a solid model with optimal balancing between Level of Detail (LOD) and computational weight. Another significant aspect of the optimized process is undoubtedly the possibility of faithfully respecting the semantics of the structure, leading to the discretization of the model into different parts depending on the materials. This work may represent an excellent reference for the study of masonry artefacts belonging to the existing historical heritage, starting from surveys and with the purpose to structural and seismic evaluations, in the general framework of knowledge-based preservation of heritage.

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Discontinuous approaches for nonlinear dynamic analyses of an ancient masonry tower

Cited by 74 publications

References 24 publications

Statics of fan vaulting: current state of knowledge and open issues

Statics of fan vaulting: current state of knowledge and open issues

Fragility functions for local failure mechanisms in unreinforced masonry buildings: a typological study in Ferrara, Italy

Point Cloud Exploitation for Structural Modeling and Analysis: A Reliable Workflow

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