Using the terrestrial laser scanner and simple methodologies for geometrically assessing complex masonry vaults

Jover, Agustí Costa; Ginovart, Josep Lluís i; Pla, Sergio Coll; Piquer, Mónica López

doi:10.1016/j.culher.2018.10.003

Cited by 15 publications

(10 citation statements)

References 21 publications

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“…28 Similar methods are employed by research scholars on parallel projects, for instance, those in Catalonia digitally surveying and analysing complex masonry vaults. 29 We used a Faro Focus laser scanner, with a resolution of one point every 3 mm at a 10-m distance, scanning in colour from the cathedral floor. To ensure good coverage along the length of the nave and choir and to make sure we captured all detail of the palm-like conoids, we used a consistent scanning pattern alternating between two scans positioning the scanner underneath the arcade column at either side of the bay, and one scan taken centrally between bays in the next (Figure 5).…”

Section: Reverse Engineering Processmentioning

confidence: 99%

Digitally aided analysis of medieval vaults in an English cathedral, using generative design tools

Webb

Buchanan

2019

International Journal of Architectural Computing

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Medieval masons relied on a ruler and compass to generate designs of increasing complexity in both two and three dimensions. They understood that arcs and lines could be used for proportioning, working with halves, thirds, fifths and so on, rather than specific dimensions. Geometric rules enabled them to create vaulted bays, high up in church and cathedral interiors. In recent years, the influence of digital generative design tools can be seen in our built environment. We will explore generative design to reverse engineer and better understand the design and computational processes that the medieval masons might have employed at our case study site of Exeter Cathedral, England. Our focus is on a run of bays along the nave, which at first appear consistent in their design, yet in reality are subtly different. We will investigate the capacity for changes in the generative process while preserving the overall medieval design concept.

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Section: Reverse Engineering Processmentioning

confidence: 99%

Digitally aided analysis of medieval vaults in an English cathedral, using generative design tools

Webb

Buchanan

2019

International Journal of Architectural Computing

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“…At present, TLS is used in multiple civil engineering applications, such as dam monitoring [5,6], landslide monitoring [7,8], bridge monitoring [9,10], motorway and tunnel monitoring [11,12], façade deformation analysis [13,14], assessing architectural heritage [15,16] and other unusual fields like forestry inventory [17,18], environmental monitoring [19] and crime scene reconstruction [20].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Time-of-Flight and Phase-Shift TLS Intensity Data for the Diagnostics Measurements of Buildings

Suchocki

2020

Materials

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In recent years, the terrestrial laser scanning system (TLS) has become one of the most popular remote and nondestructive testing (NDT) methods for diagnostic measurements of buildings and structures as well as for the assessment of architectural heritage. Apart from 3D coordinates, the power of a laser beam backscattered from the scanned object can be captured by TLS. The radiometric information of the point cloud, called “intensity”, can provide information about changes in the physio–chemical properties of the scanned surface. This intensity can be effectively used to detect defects in the surfaces of walls, such as cracks and cavities, moisture, biodeterioration (mosses and lichens) or weathered parts of the wall. Manufacturers of TLS mainly use two different principles for distance measurement, time-of-flight (TOF) and phase-shift (PS). The power of energy in both types of rangefinders might be absorbed or reflected in a slightly different way and provide more or less detailed radiometric point cloud information. The main aim of this investigation is to compare TOF and PS scanners in the context of using TLS intensity data for the diagnostics of buildings and other structures. The potential of TLS intensity data for detecting defects in building walls has been tested on multiple samples by two TOF (Riegl VZ400i, Leica ScanStation C10) and two PS (Z + F 5016 IMAGER, Faro Focus3D) scanners.

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“…Many studies have developed simple (and not so simple) to address deformation of ancient structures from point clouds. Examples of it are the studies performed in the church of Santa Maria of Portonovo [15], the Cantalovo church [16], the Palazzo d'Accursio [17] (the three of them in Italy); the church of Santa Maria de Arties [18] or the Cathedral of Tortosa [19] (both in Spain), among many others. TLS surveys and displacement assessments can be also combined with other procedures of structural analysis [20], [21].…”

Section: Introductionmentioning

confidence: 99%

Terrestrial Laser Scanner for the Formal Assessment of a Roman-Medieval Structure—The Cloister of the Cathedral of Tarragona (Spain)

et al. 2020

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The use of massive data capture techniques in architectural heritage has enhanced the development of new methodologies that have an important impact on their conservation and understanding. The research proposes the study of formal anomalies in the cloister of the Cathedral of Tarragona (c. 12th century). It is a relevant Gothic construction in Catalonia, with the special singularity that part of its structure is raised over an important pre-existing Roman wall. The investigation is based on a point cloud obtained with a terrestrial laser scanner (TLS) and the systematization of the 3D analysis methodology of the point cloud through different reference shapes. In general terms, the construction is in good condition, so the discrepancies between real construction and the shapes of reference are small, with some exceptions. Nevertheless, the different approximations used allowed us to identify some relevant features, such as the variability of the form of rib vaults, and the influence of the criteria used in the definition and location of reference forms.

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Using the terrestrial laser scanner and simple methodologies for geometrically assessing complex masonry vaults

Cited by 15 publications

References 21 publications

Digitally aided analysis of medieval vaults in an English cathedral, using generative design tools

Digitally aided analysis of medieval vaults in an English cathedral, using generative design tools

Comparison of Time-of-Flight and Phase-Shift TLS Intensity Data for the Diagnostics Measurements of Buildings

Terrestrial Laser Scanner for the Formal Assessment of a Roman-Medieval Structure—The Cloister of the Cathedral of Tarragona (Spain)

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