The Use of Radar Techniques and Boroscopy in Investigating Old Masonry: The Case of Dafni Monastery

Palieraki, Vasiliki; Vintzileou, Elizabeth; Miltiadou-Fezans, Androniki; Delinikolas, N

doi:10.1080/15583050701646711

Cited by 11 publications

(5 citation statements)

References 4 publications

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“…According to an investigation by Palieraki et al (2007), performed using radar techniques and boroscopy, timber ties were initially arranged within the masonry of the main church at two levels of the walls and the base and the top of the drum of the dome. The wooden ties at each level were twin and of cross section 0.10 m ϫ 0.10 m. In the present condition of the monument, significant parts of these ties are missing because of the dete- rioration of the wood, leaving voids in the masonry.…”

Section: Methods Of Analysis and Numerical Modelmentioning

confidence: 99%

Investigation of the Seismic Response of a Byzantine Church and Evaluation of the Effectiveness of Proposed Interventions

et al. 2010

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The seismic response of the twelfth-century Byzantine church of Panhagia Krina in Chios, Greece, is investigated in this paper. The numerical model implements all the details of the geometry of the structure and is validated by comparison of the dynamic characteristics with ambient vibration measurements. Time-history elastic analyses are performed for selective seismic motions, chosen to comply with the expected ground motion in the area. The results show that the linear elastic approach can predict the existing damage quite accurately and explain the collapses that occurred during the 1881 earthquake. The effectiveness of several interventions is also examined; in some cases, cracks were introduced in the model to overcome the limitations of the elastic analysis. The proposed interventions enhance the structure but they cannot eliminate the possibility of severe damage or even local collapses during future seismic events. This is because there are inherent problems in the structure, e.g., the large size of the dome of the main church compared with the overall size of the structure and the structurally weak system of support of this dome.

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Section: Methods Of Analysis and Numerical Modelmentioning

confidence: 99%

Investigation of the Seismic Response of a Byzantine Church and Evaluation of the Effectiveness of Proposed Interventions

et al. 2010

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“…GPR has proved to be a useful and fast method for nondestructive evaluations of modern concrete bridges (Scott et al 2003;) as well as of historical masonry structures (Palieraki et al 2008;Binda et al 2007) including masonry arch bridges (Diamantini, Giannopoulos, and Forde 2008;Trela et al 2008;Lubowiecka et al 2009;Orbána and Gutermannb 2009 by different center frequencies: 800, 500, and 250 MHz. The first survey is fully described in Arias et al (2007) and Lorenzo et al (2007).…”

Section: Information From Ground Penetrating Radarmentioning

confidence: 99%

Characterization of a Romanesque Bridge in Galicia (Spain)

Pérez-Gracia

Capua

Caselles

et al. 2011

International Journal of Architectural Heritage

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This article presents the characterization of a mediaeval bridge located in Fillaboa, Galicia (northern Spain). The study of this bridge involves data acquisition about the structure (geometry, visual inspection of damages, and nondestructive testing), the evaluation of the possible damage mechanisms compatible with the observed cracks and fissures, and the dynamic evaluation of the structure. This bridge is a masonry four-lancet arches bridge, with damage on the piers and abutments. Two non-invasive methodologies are applied to obtain information about the bridge: ground-penetrating radar (GPR) survey and ambient vibration noise measurements. The drawings of the structure were created using close-range photogrammetry (CRP). A finite elements model of the structure was obtained prior to the vibration field measurements, as a preliminary evaluation. Data obtained from GPR and the geometry determined with CRP were the information used in this preliminary model of the bridge. This model was improved using the dynamic field test to compare model behavior and to validate the numerical results. A second and more accurate model was then obtained by using finite elements according to the experimentally measured modal frequencies (the possible first three transversal vibration modes of the bridge).

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“…A number of our partners' works include research data obtained with radar, borescope, acoustic and other methods, often using the principles of complete or partial experimental model-making or digital modelling of the structures. The obtained results made it possible to reveal with great accuracy the composition and the cross section morphology of the walls and other structural elements of historical buildings [21,43,44], as well as to identify the causes of damages and to evaluate the degrees of seismic vulnerability of the structures [45,46]. Such in-depth technical studies of Armenian churches will allow for more accurate estimations and conclusions about the possibilities of the mutual work of materials, as well as efficiency of different structural systems of churches in the event of seismic forces, the composition of structural elements and materials in different parts of the building.…”

Section: Contrasting "Midis" and Three-layer Stone Masonry Walls: Mon...mentioning

confidence: 99%

A comparative analysis of the interrelation between the evolution in the structure of Armenian churches of the 4th-14th centuries and the three-layer “midis” masonry

Azatyan,

Manukian

et al. 2023

Bud-Arch

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The article touches upon the interrelations between the structural elements and the building structure in architecture. The aim of the work is to generalize the peculiarities of “midis” masonry formation and to reveal its influence in the evolution process of the structure of Armenian medieval churches by a comparative analysis of different characteristics. In the work: the development of three-layer “midis” masonry was systematized, the phenomenon of shell structure and spatial integrity in the churches of the 4th-14th centuries was highlighted, the tendencies of evolution of the masonry monolithic nature and church structure integrity were revealed by a comparative analysis of volumetric and planning characteristics of different churches. The results allowed to formulate a certain sequence of interactions in different characteristics, which confirmed the relationship between the evolution of the masonry and the structure of the churches: the evolution of “midis” masonry led to the structural monolithic nature of the walls and the forms derived from it, which in turn led to the integrity of the stone building structure. The results can be useful in further research covering structural-compositional interrelations, including both heritage and modern architecture studies.

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The Use of Radar Techniques and Boroscopy in Investigating Old Masonry: The Case of Dafni Monastery

Cited by 11 publications

References 4 publications

Investigation of the Seismic Response of a Byzantine Church and Evaluation of the Effectiveness of Proposed Interventions

Investigation of the Seismic Response of a Byzantine Church and Evaluation of the Effectiveness of Proposed Interventions

Characterization of a Romanesque Bridge in Galicia (Spain)

A comparative analysis of the interrelation between the evolution in the structure of Armenian churches of the 4th-14th centuries and the three-layer “midis” masonry

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