Experimental and Theoretical Diagnostics of Defects in Ferroconcrete Piles Based on Reflection of Longitudinal and Transverse Waves

Farenyuk, Genadii; Kaliukh, Iurii; Farenyuk, Egor; Kaliukh, Taras; Berchun, Yaroslav; Berchun, Viktoriia

doi:10.1007/978-3-319-59471-2_151

Cited by 11 publications

(6 citation statements)

References 4 publications

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“…3. In order to identify and classify defects in piles, a new theoretical basis must be developed [21][22][23][24] and corresponding well-founded criteria as well; otherwise the decision on the availability of these defects and their characteristics completely depends on the qualification of the operatorthe "human factor". That is, when using the same equipment and test instrumentation on the same pile case, it is possible to obtain different, sometimes opposite, conclusions that will directly affect the reliability of the building that will be erected on this pile field.…”

Section: Main Partmentioning

confidence: 99%

Identification of defects of the piles with reflected waves

Lebid¹,

Kaliukh²,

Berchun³

et al. 2018

Environmental Safety and Natural Resources

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Using current mathematical models of wave processes does not allow diagnosing defects in piles with sufficient accuracy. The necessity of creating of a pile generalized dynamic model which would allow to receive more reliable signals of wave processes in reinforced concrete piles has been substantiated. For numerical simulation of dynamic processes, a flat scheme for an axisymmetric pile based on the finite element method of "deep beam" within LIRA software complex was used. Sand was chosen as the soil around the pile due to the fact that sand and concrete characteristic impedance is very different, which provides a good echo from the pile toe (from the interface of the media). A comparative analysis of the results of mathematical modeling has made it possible to state that the most informative (in terms of differences in the comparison of graphs from one another), both for time signals and amplitude spectra, is the application of a horizontal impact on the lateral surface near the border with the pile base and the signal recording that comes to the speed sensors located in the vertical direction on the pile head near the border with the lateral surface. This option will be thoroughly tested numerically and experimentally in subsequent authors' studies.

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Section: Main Partmentioning

confidence: 99%

Identification of defects of the piles with reflected waves

Lebid¹,

Kaliukh²,

Berchun³

et al. 2018

Environmental Safety and Natural Resources

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“…The historical sciences, which gather and analyze the data on historical facts and events, seem to be the oldest among such systems. Theoretical and methodological issues of these problems are analyzed in the works of modern scientists (Vayas et al 2019;Tassios et al 2003;Mazzolani and Calado 2019;Highland and Bobrowsky 2008;Farenyuk et al 2018Farenyuk et al , 2019Slyusarenko et al 2009Slyusarenko et al , 2010Slyusarenko et al , 2013Slyusarenko et al , 2015Shokarev et al 2005Shokarev et al , 2009Mihalić et al 2013;Trofymchuk et al 2018Trofymchuk et al , 2019 ).This general definition can be applicable to any danger and does not contain a direct reference to landslides. Regardless of the definition and the hazard considered, EWS is used to reduce the risk by affecting the impact on exposed elements.…”

Section: Introductionmentioning

confidence: 99%

Ukraine’s Cultural Heritage Objects Within Landslide Hazardous Sites

Trofymchuk

Lebid

Berchun

et al. 2021

Lecture Notes in Civil Engineering

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During the 2012 period LACUNHEN's (Margottini, Vilimek 2014 Ukrainian Department studied two Ukrainian Heritage Sites located in complicated geological and geotechnical conditions. The report presents examination results of two objects of cultural heritage of Ukraine: Livadia Palace located within active landslide systems and the Swallow's Nest castle situated on the top of the 40-m high Aurora Cliff of Cape Ai-Todor in the Black Sea. Both objects are located in Autonomous Republic of Crimea, Ukraine, and are a subject of intensive destruction during the recent years. The report demonstrates the analysis of application of monitoring and early warning system of Livadia Palace building constructions located within active Central Livadia Landslide system as an example of system approach for monitoring of World Heritage Sites placed on active landslides. The report also presents the results of visual and instrumental examination of the Swallow's Nest castle. In 1927, the Swallow's Nest survived a serious earthquake. At the end of 1950s the cracks indicating the threat of the castle collapse were detected. The castle was recognized as dangerous and was not used for a long time. There was the idea to disassemble the castle into pieces, to number the stones and slabs and to assemble on a new safe place.

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“…The theoretical and methodological issues of these problems are analyzed in the works of modern foreign scientists, including (Vayas et al 2019;Mazzolani and Calado 2019;Tassios et al 2003;Casagli et al 2010;Highland and Bobrowsky 2008;Farenyuk et al 2018Farenyuk et al , 2019Kaliukh et al 2018Kaliukh et al , 2019aKaliukh et al , 2019bSlyusarenko et al 2009Slyusarenko et al , 2010Slyusarenko et al , 2013aSlyusarenko et al , 2013bSlyusarenko et al , 2015Shokarev et al 2005Shokarev et al , 2009) and others.…”

Section: Introductionmentioning

confidence: 99%

The Technical State Evaluation and Protection Measures Development for the Refectory Chamber Building with the Church of the National Kyiv-Pechersk Reserve

Melashenko¹,

Kisil²,

Ishchenko³

et al. 2021

Lecture Notes in Civil Engineering

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The paper presents the results of the technical condition survey and assessment by visual and design criteria carried out for one object of the National Kyiv-Pechersk Historical and Cultural Reserve, namely, the Refectory Chamber complex buildings (Upper Lavra, Fig. 1). The Refectory buildings include the Refectory Church, the Refectory Chamber and the Refectory Kitchen. To assess the Refectory buildings structures technical condition, the constructive solution features of the Refectory buildings individual elements and their structural scheme were analyzed. The Refectory buildings operating conditions were studied with highlighting the main factors affecting the materials and structures durability. The degree and types of damages were identified for building structural elements taking into account their functional purpose and location in a common spatial complex. The mathematical simulation of the Refectory Chamber building structures stressstrain state was carried out and based on its results the deformations forecast was made taking into account the base uneven settlement influence during an emergency soaking.

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Experimental and Theoretical Diagnostics of Defects in Ferroconcrete Piles Based on Reflection of Longitudinal and Transverse Waves

Cited by 11 publications

References 4 publications

Identification of defects of the piles with reflected waves

Identification of defects of the piles with reflected waves

Ukraine’s Cultural Heritage Objects Within Landslide Hazardous Sites

The Technical State Evaluation and Protection Measures Development for the Refectory Chamber Building with the Church of the National Kyiv-Pechersk Reserve

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