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Applied Sciences
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Advances in Non-destructive Diagnosis of Masonry
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Advances in Non-destructive Diagnosis of Masonry

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 5336

Special Issue Editor

Prof. Dr. Adriana Brancaccio

E-Mail Website
Guest Editor
Department of Engineering, University of Campania, 81031 Aversa, Italy
Interests: linear and non linear inverse scattering; ground penetrating radar; microwave measurements; microwave tomography; singular values decomposition; detection and localization of defects
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Non-destructive techniques for the diagnostics of masonry are an application field with promising developments that focuses on the need to detect defects or cracks, recover building details that have been lost, monitor structures during their lifetime and find ways to mitigate the effects of distasters such as earthquakes. All of these requirements push toward the use of non-invasive techniques to be employed on the field, without destructive procedures such as the extraction of core samples. The physical principles underlying the best known non-invasive techniques are ultrasound, infrared thermography, microwave tomography, surface penetrating radar and interferometric radar. Such techniques are complementary and still have room for improvement. This Special Issue is dedicated to the collection of articles focusing on the most recent advances in the various techniques and their application not only to the diagnosis of masonry, but also more generally to the diagnosis of civil engineering structures.

Prof. Dr. Adriana Brancaccio
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • non-destructive testing
  • microwave tomography
  • ultrasound tomography
  • thermography
  • ground penetrating radar
  • masonry diagnosis
  • reinforced concrete
  • material characterization
  • inverse problems
  • building safety
  • monitoring of civil structures

Published Papers (4 papers)

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Research

19 pages, 3949 KiB  
Article
A Free-Space Transmission Setup for Material Parameters Estimation with Affordable and Non-Synchronized Software-Defined Radios in the 0.85–1.55 GHz Band
by Fábio Júlio Fonseca Gonçalves, Adriana Brancaccio, Leonardo Augusto Ferreira and Elson José da Silva
Appl. Sci. 2023, 13(5), 3010; https://doi.org/10.3390/app13053010 - 26 Feb 2023
Cited by 1 | Viewed by 1102
Abstract
This paper describes a prototype of a free-space transmission setup for dielectric parameters estimation. The transmitter and receiver, both configurable by software and working in the range 0.85–1.55 GHz, are not synchronized, as they use different clocks. An estimation of the dielectric permittivity [...] Read more.
This paper describes a prototype of a free-space transmission setup for dielectric parameters estimation. The transmitter and receiver, both configurable by software and working in the range 0.85–1.55 GHz, are not synchronized, as they use different clocks. An estimation of the dielectric permittivity of a planar sample was obtained by comparing our measurements with a numerical model. A parametric study with different variables was conceived in order to find the best fit between measurements and simulations. Customized techniques were applied to deal with noise and inconsistencies found in the measurements. The genetic algorithm was used to adjust the constants that minimized the error between simulated and experimental data. Results for a reference sample of polymethylmethacrylate are presented and discussed. Although the accuracy of the proposed approach in recovering the dielectric parameters of the sample was relatively low, the simplicity and cost-effectiveness of this setup make it interesting for scenarios where a rough characterization of the material is sufficient. Full article
(This article belongs to the Special Issue Advances in Non-destructive Diagnosis of Masonry)
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15 pages, 3683 KiB  
Article
Study on the Influence of Internal Water Pressure on the Internal Force of Circular Hydraulic Tunnel Lining
by Yueyue Zhu and Cheng Liu
Appl. Sci. 2022, 12(21), 11271; https://doi.org/10.3390/app122111271 - 7 Nov 2022
Cited by 1 | Viewed by 1571
Abstract
The internal water pressure condition influences the internal force of the circular hydraulic tunnel lining. However, calculating the lining’s internal force of this type of tunnel still lacks practical theory. Based on the modified routine method and the theory of structural mechanics, the [...] Read more.
The internal water pressure condition influences the internal force of the circular hydraulic tunnel lining. However, calculating the lining’s internal force of this type of tunnel still lacks practical theory. Based on the modified routine method and the theory of structural mechanics, the internal stress model of the tunnel section is established in this paper. The general calculation formula of lining internal force is deduced by considering arbitrary water level height and different water conveyance pressures. The formula is used to calculate the internal force of the lining under the action of internal water pressure and the influence laws of water level height and water conveyance pressure are explored, respectively. In addition, case analysis was carried out for several typical projects. The results show that the maximum internal force of the lining increases with the increase of water pressure and inner radius and the maximum internal force is in a fixed special position when the water is conveyed under pressure. When the water is conveyed without pressure, the internal force of the lining will increase with the increased water level. However, the maximum bending moment and axial force will reduce at the special water level. This calculation theory considering different working conditions of internal water pressure solves the calculation problem of the internal force of a circular hydraulic tunnel. It improves the design theory of tunnel structure and provides a theoretical basis for this type of tunnel’s structural design and safe operation. Full article
(This article belongs to the Special Issue Advances in Non-destructive Diagnosis of Masonry)
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17 pages, 1379 KiB  
Article
A Quasi-Quadratic Inverse Scattering Approach to Detect and Localize Metallic Bars within a Dielectric
by Adriana Brancaccio
Appl. Sci. 2022, 12(18), 9217; https://doi.org/10.3390/app12189217 - 14 Sep 2022
Viewed by 1097
Abstract
The inverse scattering problem related to the localization of metal bars embedded within a finite-dimensional dielectric was studied in two-dimensional geometry. The dielectric was placed in air and illuminated from the outside using a linear microwave source and a multi-monostatic configuration. The discontinuity [...] Read more.
The inverse scattering problem related to the localization of metal bars embedded within a finite-dimensional dielectric was studied in two-dimensional geometry. The dielectric was placed in air and illuminated from the outside using a linear microwave source and a multi-monostatic configuration. The discontinuity at the interface between the air and the dielectric causes reflections that are neglected if a simple linear Born approximation of scattering is assumed. Herein, a new formulation was proposed based on a quadratic approximation of the scattering equation. The formulation maintained the interaction between the metal bars and the dielectric edge, whereas the mutual coupling between the bars was neglected. By exploiting the knowledge of the permittivity of the dielectric and the shape of its section, a relatively simple approximate expression for the scattered field was derived, which allowed for formulation of an inverse linear problem. Numerical examples demonstrated the feasibility of this approach. Full article
(This article belongs to the Special Issue Advances in Non-destructive Diagnosis of Masonry)
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12 pages, 1354 KiB  
Article
Semianalytical Lower-Bound Limit Analysis of Domes and Vaults
by Renato Zona, Luca Esposito, Simone Palladino, Elena Totaro and Vincenzo Minutolo
Appl. Sci. 2022, 12(18), 9155; https://doi.org/10.3390/app12189155 - 13 Sep 2022
Cited by 1 | Viewed by 1062
Abstract
The calculation of the collapse load of spherical domes is addressed using a semianalytical approach under the hypothesis of small displacements and perfect plasticity. The procedure is based on the numerical approximation of the self-stress that represents the projection of the balance equilibrium [...] Read more.
The calculation of the collapse load of spherical domes is addressed using a semianalytical approach under the hypothesis of small displacements and perfect plasticity. The procedure is based on the numerical approximation of the self-stress that represents the projection of the balance equilibrium null space on a finite dimensional manifold. The so-obtained self-equilibrated stress span is superimposed onto a finite-element linear elastic solution to the prescribed loads yielding to the statically admissible set accordingly to Melan’s theorem. The compatibility of the stress with the constitutive law of the material was enforced using a linearized limit domain in terms of generalized stress, namely, axial force and bending moment along the local spherical curvilinear coordinates. The procedure was tested with reference to numerical and experimental data from the literature, confirming the accuracy of the proposed method. A comparison with the literature confirms that the buckling load was much greater than the two plastic collapse loads calculated through the proposed procedure and reported in the quoted literature. Full article
(This article belongs to the Special Issue Advances in Non-destructive Diagnosis of Masonry)
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