Ukraine’s Cultural Heritage Objects Within Landslide Hazardous Sites

Trofymchuk, Oleksandr; Lebid, O.; Berchun, Viktoriia; Berchun, Yaroslav; Kaliukh, Iurii

doi:10.1007/978-3-030-90788-4_73

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…Calculations were made to study non-linear oscillations of the structures where as the bearing structures of the building, at each level, the metal piles located with 6 m intervals are used in both directions [6][7][8][9][10]. The piles are made of two N20A channel bars, covered with 20x20 m reinforced concrete slab of 16 cm thickness.…”

Section: Calculation Resultsmentioning

confidence: 99%

Linear Oscillations of the High-Rise Buildings

Kipiani,

Kristesiashvili,

Tabatadze

et al. 2023

esanr

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Seismic calculations are based on the hypothesis that maximum seismic horizontal displacements of inelastic systems are equal to displacements of elastic systems of equivalent frequencies.Analysis of strong earthquakes of recent years (San Francisco, USA, 1971, Spitak, Armenia, 1988, Kobe, Japan, 1995 and others) led scientists to the conclusion that this hypothesis cannot be recognized as acceptable. In a number of cases, the maximum horizontal displacements turned out to be 2–3 orders of magnitude higher than the maximum displacements of elastic systems. For example, a displacement graph based on the 1985 Mexico City earthquake shows that the actual plastic displacements are 100 times the expected plastic displacements. In the case of other earthquakes, there are hundreds of subtle inconsistencies. The quantitative results concluded that the intensity of building vibrations exceeded 1.5 times the 9-point design seismic intensity 2.5 and that a special approach, including the need to consider impact effects, is needed and is particularly serious in such zones. This should also be taken into account. Inelastic deformations are indicated. The new calculation is used to study non-linear oscillations caused by impulsive actions of a continuous system. In the case of elastic vibration, changing the mass gives very different results. Reducing the lower mass by a factor of 3 reduces the displacement by a factor of 2.2 for the upper mass and 2.4 for the second mass. The same impact was applied to a 16-story building and the stiffness distribution of the rods was studied in different ways. The stiffness was constant everywhere, constant within 4 stories, where it varied linearly and parabolically with height. Displacements during the course of the pulse shock were greater in the stiffer buildings. Furthermore, the vibration decreases in amplitude by a factor of 3 or more for the upper mass and by a factor of 4 for the lower mass. The force on the upper rod is reduced by a factor of 4 and the force on the lower rod is reduced by a factor of 6. This will make it possible to perform calculations for a small time scale, which is necessary to take into account high-frequency oscillations that occur in the epicentric zone.

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Section: Calculation Resultsmentioning

confidence: 99%

Linear Oscillations of the High-Rise Buildings

Kipiani,

Kristesiashvili,

Tabatadze

et al. 2023

esanr

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“…Similar problems of the plane theory of elacticity, plate bending and extended systems are considered in [G. Kapanadze (2003, S. Shavlakadze, G. Kapanadze, A. Gogolauri (2019)] and Ukrainian scientists [16][17][18][19][20][21][22].…”

Section: Problem Statementmentioning

confidence: 99%

Search for an equal-strength contour inside a viscoelastic rectangle

Kapanadze,

Balavadze,

Kristesiashvili

et al. 2023

esanr

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Irregularity of geometric and physical parameters in thin-walled structures leads to significant concentrations of stresses and creates dangerous zones for the spread of cracks or plastic deformations. Under the influence of a tense state, they are similar to gills. Stress concentration zones in areas of irregularity have a significant impact on the tensile strength and durability of thin-walled structures. Traditional analytical and numerical methods known at this time are less effective in investigating the stress-strain condition of corrugated thin-walled structures. It is, therefore, necessary to develop new effective methods for solving the tasks of this class. Currently, for engineering calculations, there is virtually no comparison of simple and convenient formulas for determining the critical compressive load taking into account the peculiarities of the design. The scientific novelty of the paper is that to achieve the set goal, it will be used for the first time in the general theory developed for the calculation of buildings and structures, known as the "Theory of elasticity in ordinary differential equations." The paper will show that the accuracy of this new theory is adequate to the classical elongation theory and at the same time dramatically simplifies the solution of any problem in the calculation of tiles, which is achieved by converting them to conventional differential equations. The general methods of compiling differential equations, the methods of its simplification, for the calculation of membranes with cross-sectional incisions, and the calculation of plates under conditions of nonlinear deformation are discussed. Methods for solving differential equations with variable and momentum coefficients are specified. An algorithm and a program for the analysis of the stress-strain state of spatial structures and their elements are developed. The practical value of the paper lies in the possibility of using developed methods and programs for the design and construction of buildings, as well as for the stability tasks of slabs with holes, and panels used in construction as typical assembly elements. The given mathematical algorithm and program for specific tasks, which are distinguished by simplicity, can be used by design and research organizations in the calculation and design of plates and membranes.

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“…Thus, it can be concluded that in Ukraine today there is no unified dynamic certification method legalized at the level of DBN [26,28,29] or standard. In view of this, the methods improvement for the buildings inspection to assess their actual seismic resistance and determine the residual resource with an allowance for the structures physical tearing, is an urgent task.…”

Section: Introductionmentioning

confidence: 99%

Dynamic certification and assessment of the buildings life cycle under regular explosive impacts

Trofymchuk¹,

Kaliukh²,

Dunin³

et al. 2022

SRIT

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Today in Ukraine, there is no single legalized, generally accepted methodology (at the level of a Ukrainian building standard) for dynamic certification of buildings and structures. A unified approach is proposed as such a technique. It includes four components: visual inspection of buildings; experimental studies of the dynamic response of buildings or structures to explosive effects; mathematical modeling of the stress-strain state of the object under study; synthesis of the results of visual inspection; experimental studies and numerical simulation in order to generalize them systematically. As an approbation, the deterioration of the resource of reinforced concrete structures of residential buildings under the conditions of constant mass industrial explosions with a capacity of 500 to 700 tons in the quarry of Southern GZK (Mining and Processing Plant) in the city of Kryvyi Rih, Ukraine, has been studied. Based on the processing of numerous experimental data and the results of mathematical modeling, a probabilistic model for predicting the deterioration of the technical condition of reinforced concrete structures of the Center for Children and Youth Creativity “Mriya” has been obtained. Calculations of the risks of destruction of the building’s load-bearing elements for its vulnerable areas made it possible to clarify its service life. It decreased by ~ 30 years compared to the standard in 2012.

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Ukraine’s Cultural Heritage Objects Within Landslide Hazardous Sites

Cited by 5 publications

References 15 publications

Linear Oscillations of the High-Rise Buildings

Linear Oscillations of the High-Rise Buildings

Search for an equal-strength contour inside a viscoelastic rectangle

Dynamic certification and assessment of the buildings life cycle under regular explosive impacts

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