Non-Destructive Testing of Materials in Civil Engineering

Schabowicz, Krzysztof

doi:10.3390/ma12193237

Cited by 75 publications

(63 citation statements)

References 37 publications

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“…The majority of analyses of existing structures are based on visual inspection, searching for visible cracks on the walls or slabs and others [1][2][3][4]. In some cases, special equipment is used, including sclerometers, ultrasonic emitter, radar or other non-destructing material testing methods [5][6][7][8]. Less popular are high-precision measuring techniques used only in case of uneven settling or extreme cases (excessive deflections of slabs).…”

Section: Introductionmentioning

confidence: 99%

Use of TLS (LiDAR) for Building Diagnostics with the Example of a Historic Building in Karlino

2020

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This article presents the use of TLS (LiDAR) measurement for the evaluation of the technical conditions of a historic building. A FARO M70 laser scanner was used in the study. The measurements was taken as an RCP point cloud. The measurement allowed to partially determine the cause of the building damage. The performed measurement allows to propose a precise solution that could be pre-fabricated. The study shows the usefulness of TLS in building diagnostics. Improper measurement could lead to a wrong solution and a certain degree of uncertainty.

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Section: Introductionmentioning

confidence: 99%

Use of TLS (LiDAR) for Building Diagnostics with the Example of a Historic Building in Karlino

2020

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“…Most of them are diagnostic methods such as chemical, ultrasonic, electrical, etc. [9,10] used for building safety inspections. Methods and systems of internal environment testing and sustainability of buildings assessment are rapidly developing (e.g., [11][12][13]).…”

Section: Introductionmentioning

confidence: 99%

Sustainable Test Methods for Construction Materials and Elements

2020

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The laboratory testing of the construction materials and elements is a subset of activities inherent in sustainable building materials engineering. Two questions arise regarding test methods used: the relation between test results and material behavior in actual conditions on the one hand, and the variability of results related to uncertainty on the other. The paper presents the analysis of the results and uncertainties of the simple two independent test examples (bond strength and tensile strength) in order to demonstrate discrepancies related to the ambiguous methods of estimating uncertainty and the consequences of using test methods when method suitability for conformity assessment has not been properly verified. Examples are the basis for opening discussion on the test methods development direction, which makes possible to consider them as ‘sustainable’. The authors address the negative impact of the lack of a complete test models taking into account proceeding with an uncertainty on erroneous assessment risks. Adverse effects can be minimized by creating test methods appropriate for the test’s purpose (e.g., initial or routine tests) and handling with uncontrolled uncertainty components. Sustainable test methods should ensure a balance between widely defined tests and evaluation costs and the material’s or building’s safety, reliability, and stability.

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“…It does not need parameters such as wave velocity to realize damage imaging. Damage indication based on a single damage index value demonstrated its advantages in other methods such as vibro-acoustic modulation technique which facilitates interpretation of damage in the structures as well as monitoring of the damage evolution [16][17][18]. Liu [4] uses Lyapunov to characterize the relationship between the measured signal and the baseline signal to define the damage index, and realizes the imaging of delamination damage of composite plates.…”

Section: Introductionmentioning

confidence: 99%

Damage Localization of Composites Based on Difference Signal and Lamb Wave Tomography

Jiang

Liang

et al. 2020

Materials

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In order to deal with the problem of composite damage location, an imaging technique based on differential signal and Lamb wave tomography was proposed. Firstly, the feasibility of the technique put forward was verified by simulation. In this process, the composite model was regularly set down by the circular sensor array, with each sensor acting as an actuator in sequence to generate Lamb waves. Apart from that, other sensors were used to collect response signals. With regard to the damage factor, it was mainly determined by the difference between the damage signal and the non-damage signal. The probabilistic imaging algorithm was employed to carry out damage location imaging. Then, experiments were carried out so as to study the selected composite plate. Finally, the tentative outcomes have illustrated that the maximum error of damage imaging position was 7.07 mm. The relative error was 1.6%. In addition, the method has the characteristics of simple calculation and high imaging efficiency. Therefore, it has large technical potential and wide applications in the damage location and damage recognition for composite material.

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Non-Destructive Testing of Materials in Civil Engineering

Cited by 75 publications

References 37 publications

Use of TLS (LiDAR) for Building Diagnostics with the Example of a Historic Building in Karlino

Use of TLS (LiDAR) for Building Diagnostics with the Example of a Historic Building in Karlino

Sustainable Test Methods for Construction Materials and Elements

Damage Localization of Composites Based on Difference Signal and Lamb Wave Tomography

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