Mechanical Properties of Rock Units From the Pompeii Archaeological Site, Italy

Autiero, Francesca; Martino, Giuseppina De; Ludovico, Marco Di; Prota, Andrea

doi:10.2495/str190291

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…UNI, 2010 for Italian conditions or CEN, 2016 for a broader European context), possibly reduced according to service and load duration classes (CEN, 2004). Recent studies found an average specific weight of about 2000 kg/m 3 for lava specimens (Autiero, De Martino, Di Ludovico, & Prota, 2019b), about 1200 kg/m 3 for mortars (Autiero, De Martino, Di Ludovico, & Prota, 2019a;Miriello et al, 2010). These values may be extended also to the calculation of floor slabs weight.…”

Section: Definition Of An Analytical Modelmentioning

confidence: 71%

Parametric approach to the reconstruction of timber structures in Campanian Roman houses

Sbrogiò

2022

Virtual archaeol. rev.

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The virtual reconstruction of ancient architecture aims at describing the ‘original’ elevation and volume of a disappeared building. The feeble archaeological traces, often limited to their foundations, left by houses impair the reinstating of their image, in contrast to that which is made possible by the massive structures of public buildings. A twofold problem arises when dealing with timber structures during a reconstruction procedure: at the local scale of the individual beam (e.g. joists or rafters), one must define a beam’s cross-section given its span; at the overall scale, the shape of a building results from that which its structures allowed it to have been. Therefore, this work proposes a procedure to deal with the ‘local’ problem, i.e. the definition of a beam’s cross-section from its span. To that end, a simplified, parametric structural model is required. The available bits of information are organized into inputs, parameters and outputs of the analytical problem by matching each information with a structural quantity (load, cross-section, spacing, etc.). Two mathematical relationships among them are proposed, which express two equally possible dimensioning criteria, based either on joists’ strength or deformability. It seems that the joist’s strength was the option for lightly loaded joists, as in roofs or tightly spaced floor frames; conversely, heavily loaded joists conformed to the deformability criterion. Both dimensioning procedures are translated into a visual algorithm in Grasshopper, a plugin for Rhinoceros modelling software, which enables the parametric definition of objects. Finally, the proposed procedure is tentatively applied to automatically reconstruct the floor and roof frames that belonged to the domus on top of the Sarno Baths in Pompeii. The algorithm automatically picked the dimensioning criterion in relation to each frame’s span and hypothesized loads and determined joists’ orientation and minimum cross-sections. The obtained floor frames, whose structural conditions are considered as sensible, will be adopted in the overall virtual reconstruction proposal of the ruins, also based on the analytical evaluation of masonry structures.Highlights:- Proposal of a structural model for the dimensioning of timber floor beams in domestic spaces based on archaeological and literature information.- Parametrical interpretation of the model in Grasshopper for Rhinoceros software and optimization analysis of the structural parameters involved.- Application of the model to the reconstruction of floor frames in a house in the Sarno Baths complex, Pompeii.

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Section: Definition Of An Analytical Modelmentioning

confidence: 71%

Parametric approach to the reconstruction of timber structures in Campanian Roman houses

Sbrogiò

2022

Virtual archaeol. rev.

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“…"calcare del Sarno", "lava" and "cruma"). Over the course of the archaeological excavation work started in May 2018 at the Regio V, it was possible to collect original units of such rock types from the newly-emerged ruins [5]. A brief description of such rock types is summarized in Table 1.…”

Section: Original Rock Unitsmentioning

confidence: 99%

“…Original rock units from the ruins emerged in the excavation works in Regio V started in May 2018 and pozzolanic lime-based mortars compliant with the traditional typologies were selected to built the panels. Thus, a preliminary investigation of the mechanical properties of the single building materials was carried out including the execution of both NDTs and DTs [4,5]. Therefore, three panels (1.20m x 1.20m x 0.45m) were built and sonic pulse velocity tests were performed in order to provide a useful tool for a comparison with the same tests performed on original structures at the site.…”

Section: Introductionmentioning

confidence: 99%

Axial Compression Tests on Rubble Stone Masonry Reproducing Opus Incertum of Ancient Pompeii

Autiero¹,

Martino²,

Ludovico³

et al. 2021

12th International Conference on Structural Analysis of Historical Constructions

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In order to investigate the mechanical behaviour of the typical ancient rubble stone masonry type at the archaeological Pompeii site, an experimental program was carried out on masonry panels realized with the aim of reproducing the ancient technique opus incertum. Three panels (1.20m x 1.20m x 0.45m) were realized by using original rock units from ruins emerged in the excavation works at Regio V at the site and pozzolanic lime-based mortar realized according to the traditional technique. The first phase of the experimental program involved the accurate reproduction of Pompeii-like masonry panels and the execution of sonic pulse velocity tests to be compared with those carried out on original structures at the site. Thus, three in-situ diagonal compression tests were carried out to derive masonry shear strength and relevant correlation with sonic velocities. The last phase of the experimental program focuses on laboratory axial compression tests on five specimens extracted from the three panels analyzed in the first phase and is herein described in detail. The results of axial compression tests on two of such specimens in terms of axial compression strength and elastic modulus as well as the analysis of the crack pattern and failure mode is herein presented and discussed.

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The construction of a street never opened to traffic. The extraordinary discovery of pavement engineering in vicolo dei Balconi of Pompeii

Autelitano

Bruno

Martinelli³

et al. 2022

Journal of Cultural Heritage

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Mechanical Properties of Rock Units From the Pompeii Archaeological Site, Italy

Cited by 5 publications

References 6 publications

Parametric approach to the reconstruction of timber structures in Campanian Roman houses

Parametric approach to the reconstruction of timber structures in Campanian Roman houses

Axial Compression Tests on Rubble Stone Masonry Reproducing Opus Incertum of Ancient Pompeii

The construction of a street never opened to traffic. The extraordinary discovery of pavement engineering in vicolo dei Balconi of Pompeii

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