DH2013 - Track 3

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https://diglib.eg.org/handle/10.2312/12324

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Browsing DH2013 - Track 3 by Subject "analysis"

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    Architecture and representation: digital surveying of Pavilion 19 of the former Slaughterhouse (Ex Mattatoio) of Rome
    (The Eurographics Association, 2013) Farroni, Laura; -
    The survey discussed here concerns a critical review, through the use of digital technology, of the original design by Gioacchino Ersoch of Pavilion 19 of the former Slaughterhouse of Rome, which was constructed between 1888 and 1891. The intended use of the building required its subdivision into spaces that were subject to strict health regulations. Interventions carried out post-construction, during the course of the 20th century, modified both the formal appearance and the spatial configuration of the complex. The development of a digital model through the processing of the design drawings and working documents pertaining to the original construction has made it possible to revisit the original spatial arrangement, verifying the architectural language and construction techniques implemented. The building in question is characterised by the use of iron, brick and plaster. By conducting a digital survey on a work designed by a specific, named architect, it has been possible to reconstruct thè creative path (the concept) of the architecture, which was associated with a particular historical period the late 19th-century. The complex's invisible "memory" comes to light through the digital design/model: the investigation was geared towards finding out what cannot be conserved because it is no longer extant but which could, nevertheless, offer stimuli for future intervention strategies. The survey was carried out on three parallel levels architectural, structural and decorative and has enabled charts of the elements to be put together that allow for recognition of what has been lost and what, in contrast, remains, both in the specific pavilion in question and across the entire complex, since the complex was subject to a great deal of replication and standardisation. Currently, parts of the pavilions of the former slaughterhouse are being used by Roma Tre University.
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    Finite Element Modelling of Contact in Rubble Stone Masonry
    (The Eurographics Association, 2013) Isfeld, Andrea; Shrive, Nigel; -
    Multi-wythe masonry walls are a common structural component of heritage buildings. Typically constructed with two dressed outer wythes and a rubble core, these structures are susceptible to environmental degradation, as infiltration of water coupled with freeze-thaw action can break down the existing mortar which can then be flushed out of the wall. The resulting un-bonded core material applies pressure on the outer wythes, leading to lateral displacements and possible failure of the walls. Study of these deformations, and the effects of potential intervention methods through finite element modelling, can ensure adequate measures are selected and implemented. With the core being composed of rounded or fragmented stones and containing little of the original mortar, failure is dominated by rotation and sliding of the stones, rather than failure of the stone units. A dynamic simplified micromodel captures the geometry of the individual stones within a cross-section of a wall from the Prince of Wales fort in northern Canada, allowing translation of the units under self-weight. Linear elastic material properties and frictional contact conditions reduce the complexity of the model while adequately representing the observed conditions. As mesh density is known to impact the results of contact problems greatly, a small sample of stones from the wall has been studied using 8 models containing between 778 and 11701 linear elements. High mesh densities are required to approximate the curved geometry, and reduce faceting due to the flat element edges. These models are run under two separate time steps, in the first the load is applied and in the second the parts are allowed time to reach equilibrium. The resulting displacements of the small models have been examined and compared, optimizing the mesh density for the given sample, which can then be applied to the full cross section.