Characterization of a Romanesque Bridge in Galicia (Spain)

Pérez-Gracia, Vega; Capua, D. Di; Caselles, O.; Rial, Fernando; Lorenzo, Henrique; González-Drigo, Ramón; Armesto, Julia

doi:10.1080/15583050903560249

Cited by 23 publications

(10 citation statements)

References 21 publications

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“…• Thickness of ashlars (pavement, ring arch, spandrel walls, etc.) [124,130,139,140,[142][143][144][145][146].…”

Section: Stone Masonry Arch Bridgesmentioning

confidence: 99%

“…There are different studies combining GPR with structural assessment on masonry arch bridges. The knowledge of the internal geometry and material characterization of the bridge allows engineers to perform more accurate numerical simulations and detailed assessment of the bridge's structural load capacity and safety [136,139,140,142,143,[145][146][147][148][149][150][151]. Figure 9 presents some GPR data obtained in three different masonry arch bridges, which demonstrate the feasibility of the technique for the documentation of previously unknown information from the interior of the structure.…”

Section: Stone Masonry Arch Bridgesmentioning

confidence: 99%

“…Ground-coupled antenna configurations, usually single antennas mounted on a trolley or manually on a survey cart, are used in this type of bridge surveying. Alani et al [132], Fauchard et al [135], Pérez-Gracia et al [140], Solla et al [128][129][130][131]137,144], Lubowiecka et al [142] and Arêde et al [145] employed a combination of low and medium (500-600 MHz) center frequency antennas to evaluate the stone masonry health assessment. Additionally, higher frequencies were used in the 800 MHz to 2 GHz frequency range to estimate the thickness of masonry walls and arches [124,132,[134][135][136]138,140,141,143].…”

Section: Stone Masonry Arch Bridgesmentioning

confidence: 99%

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A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices

2021

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The non-destructive testing and diagnosis of transport infrastructures is essential because of the need to protect these facilities for mobility, and for economic and social development. The effective and timely assessment of structural health conditions becomes crucial in order to assure the safety of the transportation system and time saver protocols, as well as to reduce excessive repair and maintenance costs. Ground penetrating radar (GPR) is one of the most recommended non-destructive methods for routine subsurface inspections. This paper focuses on the on-site use of GPR applied to transport infrastructures, namely pavements, railways, retaining walls, bridges and tunnels. The methodologies, advantages and disadvantages, along with up-to-date research results on GPR in infrastructure inspection are presented herein. Hence, through the review of the published literature, the potential of using GPR is demonstrated, while the main limitations of the method are discussed and some practical recommendations are made.

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“…• Thickness of ashlars (pavement, ring arch, spandrel walls, etc.) [124,130,139,140,[142][143][144][145][146].…”

Section: Stone Masonry Arch Bridgesmentioning

confidence: 99%

Section: Stone Masonry Arch Bridgesmentioning

confidence: 99%

Section: Stone Masonry Arch Bridgesmentioning

confidence: 99%

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A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices

2021

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“…Application of FE model updating to ancient masonry buildings is relatively recent. In [4,5,12,13,15,20,22,24,27,33,37,38,43] a vibration-based model updating is conducted, and preliminary FE models are tuned by using the dynamic characteristics determined through system identification techniques. In the papers cited above the modal analysis of the FE models are conducted via commercial codes, and the model updating procedure is implemented separately.…”

Section: Introductionmentioning

confidence: 99%

Finite element model updating for structural applications

Girardi

Padovani

Pellegrini

et al. 2020

Journal of Computational and Applied Mathematics

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A novel method for performing model updating on finite element models is presented. The approach is particularly tailored to modal analyses of buildings, by which the lowest frequencies, obtained by using sensors and system identification approaches, need to be matched to the numerical ones predicted by the model. This is done by optimizing some unknown material parameters (such as mass density and Young's modulus) of the materials and/or the boundary conditions, which are often known only approximately. In particular, this is the case when considering historical buildings.The straightforward application of a general-purpose optimizer can be impractical, given the large size of the model involved. In the paper, we show that, by slightly modifying the projection scheme used to compute the eigenvalues at the lowest end of the spectrum one can obtain local parametric reduced order models that, embedded in a trust-region scheme, form the basis for a reliable and efficient specialized algorithm.We describe an optimization strategy based on this approach, and we provide numerical experiments that confirm its effectiveness and accuracy.

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“…Different surveys and studies could be applied in order to collect this documentation. Modern topographic surveys allow obtaining precise threedimensional models of the structures (e.g., Arias et al ; Perez‐Gracia et al ). Furthermore, the knowledge of the inner elements and constructive structures, as well as possible internal damage, is also decisive in restoration and conservation processes.…”

Section: Introductionmentioning

confidence: 99%

Ground‐penetrating radar evaluation of the ancient Mycenaean monument Tholos Acharnon tomb

Santos-Assunçao¹,

Dimitriadis²,

Konstantakis³

et al. 2016

Near Surface Geophysics

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The assessment of cultural heritage requires high-resolution and non-destructive methodologies. Ground-penetrating radar is widely applied in the inspection of historical buildings. However, some structures with curved surfaces make the radar data acquisition process difficult and consequently the following data interpretation. This paper describes a case study concerning a circular and buried Greek monument. This monument is a magnificent tomb buried with irregular stones. However, its structure and the internal stones arrangement are unknown. Therefore, a radar survey was carried out to achieve two main objectives: (i) identification of hidden elements and arrangement of the stones and (ii) detection of specific zones where further restoration and maintenance should be recommended. The methodology for the radar data acquisition involves the use of a laser scan in order to define accurately each radar line, covering all the internal surface of the tomb. Radar data processing was developed by converting Cartesian coordinates into polar coordinates. This procedure allows defining better the internal anomalies, improving the radar data interpretation. The main results of the survey were three: (i) the presence of a hidden target buried in the corridor access to the tomb; (ii) the description of the internal structure of the walls of the tomb, defining the stones arrangement and the position and depth to the keystone; and (iii) the existence of delimited zones where the signal is highly attenuated, probably due to a high salt content.internal damage, is also decisive in restoration and conservation processes. The inner information is usually gathered by means of non-destructive surveys in many cases.Ground-penetrating radar (GPR) is a non-destructive geophysical surveying technique that is nowadays applied to structures assessment. The methodology lays in the emission of highfrequency electromagnetic pulses that travel trough the medium. The changes in the electromagnetic properties of the medium are discontinuities, which are identified by the reflection of the energy. As a consequence, the technique provides images where the depth to the discontinuity is determined by the two-way travel time of the reflected waves on the A-scans. The projection on the surface is defined by the coordinates of the position of the receiver antenna in the B-scans. The knowledge of the depth and position of buried targets is fundamental in archaeological applications. Hence, the method has been widely used in this field during the last decades (Neubauer et al.

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Characterization of a Romanesque Bridge in Galicia (Spain)

Cited by 23 publications

References 21 publications

A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices

A Review of GPR Application on Transport Infrastructures: Troubleshooting and Best Practices

Finite element model updating for structural applications

Ground‐penetrating radar evaluation of the ancient Mycenaean monument Tholos Acharnon tomb

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