scholarly journals Application of Non-Destructive Testing in Evaluating Reinforced Concrete Structural Elements in Buildings

2008 ◽  
Vol 31 (1) ◽  
pp. 83-87
Author(s):  
I.A. Rubaratuka ◽  
P. Ndumbaro
Keyword(s):  
Reinforced Concrete ◽  
Structural Elements ◽  
Non Destructive Testing ◽  
Testing Methods ◽  
Destructive Testing ◽  
Mobile Crane ◽  
Actual Strength ◽  
Materials Used ◽  
Non Destructive

Of recent a large number of existing reinforced concrete buildings have required reconstruction, renovation and improvement. This tendency poses a number of problems that have to be solved, the main one being to determine the actual strength condition of the structural components/elements of the building. It includes determination of the qualityof materials used, specification of the types and description of apparent faults and damages and extent of wear of the building. To undertake this evaluation, non – destructive testing methods are used. In this paper, applications of non –destructive testing methods to determine the strength state of reinforced concrete columns with corbels and to establishtheir structural strength so as to determine the capacity of a mobile crane to be installed is outlined.

Study of the residual imperfections using methods of probability theory

2021 ◽  
Vol 87 (9) ◽  
pp. 44-49
Author(s):  
D. A. Kuzmin
Keyword(s):  
Probability Theory ◽  
Generalized Equation ◽  
Structural Elements ◽  
Non Destructive Testing ◽  
Operational Control ◽  
Destructive Testing ◽  
Control Procedures ◽  
Non Destructive ◽  
A Current

Discontinuities in the products that occur during manufacture, mounting or upon operation can be missed during non-destructive testing which do not provide their complete detectability at a current level of the technology. Therefore, it is necessary to take into account that certain structural elements may have discontinuities of significant dimensions. We present the results of using the methods of probability theory in studying the residual imperfections that remains in the structure after non-destructive control and repair of the previously identified defects. We used the results of operational control of units carried out by ultrasonic and radiographic methods. We present a method for determining a multifactorial coefficient that takes into account the detectability of defects, the number of control procedures and the errors in the instrumentation and methodological support, as well as a generalized equation for the probability distribution of detecting discontinuities. The developed approach provides assessing of the level of damage to the studied objects, their classification proceeding from the quantitative data and determination of the values of postulated discontinuities for deterministic calculations. The results obtained can be used to improve the methods of monitoring NPP facilities.

scholarly journals Многопараметровый контроль многослойных структур импульсным вихретоковым методом

2019 ◽  
Vol 45 (15) ◽  
pp. 17
Author(s):  
Д.С. Малушин
Keyword(s):  
Aerospace Industry ◽  
Laminated Composite ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Magnetic Components ◽  
Pulsed Eddy Current ◽  
Laminated Composite Materials ◽  
Materials Used ◽  
Non Destructive

A novel multi-parameter pulsed eddy current technique has been developed. This solution allows separate quantitative determination of more than seven parameters of multilayer structures, containing magnetic components. Describes the applicability of this technique for non-destructive testing of low-conductive magnetic coatings and laminated composite materials, used in the aerospace industry.

Implementation of Non-Destructive Impact Hammer Testing Methods in Determination of Brick Strength

2012 ◽  
Vol 174-177 ◽  
pp. 280-285 ◽  
Author(s):  
Jiří Brožovský
Keyword(s):  
Close Correlation ◽  
Non Destructive Testing ◽  
Testing Methods ◽  
Destructive Testing ◽  
Technical Standards ◽  
Testing Procedures ◽  
Rebound Number ◽  
Testing Field ◽  
Non Destructive

In the building industry, non-destructive testing methods are mostly used to determine parameters of concrete structures and concrete of its own; as to other materials, these methods serve semi-occasionally and, as a rule, testing procedures and evaluation are not codified in technical standards. One of non-destructive testing field of applications is testing of piece bricks. This paper deals with findings concerning non-destructive testing of clay solid bricks, honeycomb bricks and lime sand bricks by means of Schmidt Impact Hammers types LB/L. Described here are testing method, procedures of test finding evaluation as well as calibration correlations between impact hammer rebound number and compression strength or flexural strength (lime sand bricks only). Evaluated calibration correlations between impact hammer rebound number and brick strength feature close correlation; its coefficient varies between 0.95 and 0.98, therefore these values are usable in practice. When testing honeycomb bricks varying in hole arrangement and wall thickness, it is necessary to take both these factors into account through specification of calibration correlation of non-destructive/destructive tests of limited number of bricks.

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