SEARCHING AND MEASUREMENT OF FUNCTIONAL VOIDS BY MEANS OF GPR TOMOGRAPHY BY THE EXAMPLE OF TWO COLUMNS
Journal Title: International Journal for Computational Civil and Structural Engineering - Year 2017, Vol 13, Issue 1
Abstract
he present article focuses on GPR tomography method potential aimed at the search of functional voids and estimation of their sizes in engineering structures. The size of voids is assumed to be greater than the wavelength for usable frequency. Two examples of the GPR tomographic survey are examined: 1) a square con-crete pillar with granite coating and a square void in the center, 2) cylindrical granite column with functional spherical void which has iron walls. The following issues are considered in the article: the method, the structure of the acquired data, the picking of wanted waves, the analysis of tomographic inversion result, compared with the result of commonly used single-fold antenna geometry GPR. As a result of the research performed it was demonstrated that GPR tomography represents a good solution for the problem of detection, delineation and characterization of voids inside engineering structures. The velocity of electromagnetic waves propagated within the solid part of the column (concrete and granite) was accurately measured. The measured velocity can be con-sidered to the basis for physical properties estimation, for example humidity, voids ratio etc. The acquired quan-titative results are characterized by high quality and are more reliable compared to the results of single-fold GPR survey.
Authors and Affiliations
Marina S. Sudakova, Eugeniya B. Terentieva, Alexey Yu. Kalashnikov
Keywords
Related Articles
- EP ID EP576607
- DOI 10.22337/2587-9618-2017-13-1-94-109
- Views 79
- Downloads 0
FEATURES OF THE NUMERICAL SOLUTION OF BOUNDARY VALUE PROBLEMS WITH THE USE OF PYTHON ALGORITHMIC PROGRAMMING LANGUAGE
The solution of the majority of the practical tasks arising at calculation of constructions demands a numerical solution of boundary value problems. In article on examples of a solution of specific boundary value problem...
GLOBAL ASYMPTOTICS OF THE FILTRATION PROBLEM IN A POROUS MEDIUM
Filtration of the suspension in a porous medium is important when strengthening the soil and creating watertight partitions for the constructi on of tunnels and underground structures. A model of deep bed filtration with...
PASSIVE VIBRATION SUPPRESSION OF STRUCTURES IN THE VICINITY OF NATURAL FREQUENCIES USING PIEZOEFFECT
The proposed method of passive vibration suppression of structures is based on the use of the piezoelectric effect, which consists in the ability of the piezoelectric material to convert electrical energy into mechanic...
NONLINEAR ANALYSIS OF STATICALLY INDETERMINATE WOODEN STRUCTURES AND OPTIMIZATION OF CROSS SECTION DIMENSIONS OF DOME RIBS
The analysis of the behaviour of natural structures of laminated wood domes and the numerous preliminary calculations have shown the possibility of saving materials by reducing the height of cross sections of meridi...
РАСЧЕТ ВЛАЖНОСТНОГО РЕЖИМА ОДНОСЛОЙНЫХ ОГРАЖДАЮЩИХ КОНСТРУКЦИЙ С ИСПОЛЬЗОВАНИЕМ ДИСКРЕТНО-КОНТИНУАЛЬНОЙ МАТЕМАТИЧЕСКОЙ МОДЕЛИ
настоящей статье представлен расчет влажностного режима однослойных ограждающих конструкций зданий с применением дискретно-континуального метода. Выведена формула, позволяющая рассчитывать зависимость потенциала влажност...