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Papers by Katarzyna Dołżyk-Szypcio
Materials, Oct 11, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Applied Sciences, 2022
Many shear strength criteria have been proposed for soils. The Mohr–Coulomb, Matsuoka–Nakai, and ... more Many shear strength criteria have been proposed for soils. The Mohr–Coulomb, Matsuoka–Nakai, and Lade–Duncan criteria are more frequently used for sands. For sands sheared in drained conditions, the general stress–dilatancy relationship is obtained from the frictional state concept. It is shown that, in failure states, the dilatancy for triaxial compression, the plane strain condition (biaxial compression), triaxial extension, and general states can be expressed by the ratio of the volumetric and axial strain increments for triaxial compression. By using the frictional state concept, the shear strength of sand for general states can be expressed by the critical state angle and the dilatancy for drained triaxial compression. It is shown that the calculated shear strength of the sand is similar to that obtained by using the Mohr–Coulomb, Matsuoka–Nakai, and Lade–Duncan criteria for the non-dilative, moderate-dilative, and high-dilative behaviors of sand, respectively. Therefore, the s...
IOP Conference Series: Earth and Environmental Science, 2019
The relationship between total annual precipitation and solar activity (sunspot number) were stud... more The relationship between total annual precipitation and solar activity (sunspot number) were studied based on annual precipitation data from 25 weather stations in Poland that were gathered from 1966 to 2016. The correlation between a yearly sunspot number and a total annual precipitation were analysed by sinusoidal repression analysis. The 5-year smoothest sunspot number and a total annual precipitation for each weather station were taken for final analysis. The parameters of sin curve were calculated by the least square fit method. It is assumed that the frequency is 10.87 years which is a mean spring tidal period of Jupiter and Saturn. The cross correlation between solar activity and total annual precipitation was shown. The difference in year between a minimum yearly sunspot number and a maximum total annual precipitation is assumed as the level of correlation. It is also assumed that high correlation occurs if the difference in question is smaller than 1.5 years, moderate if the difference is higher than 1.5 and smaller than 2.5 years and weak if the difference is higher than 2.5 years. The southern and southwestern regions of Poland give high correlation, central and northern-moderate, and easternweak correlations. The presented analysis may be treated as the first step for a more accurate multi-scale harmonic analysis.
Publikacja jest udostępniona na licencji Creative Commons Uznanie autorstwa-Użycie niekomercyjne-... more Publikacja jest udostępniona na licencji Creative Commons Uznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 4.0 (CC BY-NC-ND 4.0). Pełną treść licencji udostępniono na stronie creativecommons.org/licenses/by-nc-nd/4.0/legalcode.pl. Publikacja jest dostępna w Internecie na stronie Oficyny Wydawniczej PB. Recenzenci: prof. dr hab. inż. Waldemar Świdziński dr hab. inż. Piotr E. Srokosz, prof. UWM Redaktor naukowy dyscypliny inżynieria lądowa i transport: prof. dr hab. inż. Katarzyna Zabielska-Adamska
Basing on Frictional State Theory, the natural state parameter for sand is defined as an extensio... more Basing on Frictional State Theory, the natural state parameter for sand is defined as an extension of state parameter proposed by Been and Jefferies. It is shown that for sand sheared at drained triaxial compression at failure and post-failure, sand behaviour is purely frictional and natural state parameter is ψ° ≈ 0. This parameter can be used for prediction of sand strength and modeling in the future.
IOP Conference Series: Earth and Environmental Science, 2019
IOP Conference Series: Earth and Environmental Science, Dec 1, 2017
In this paper the sand-steel interface behaviour is analysed on the basis of frictional state the... more In this paper the sand-steel interface behaviour is analysed on the basis of frictional state theory. It is shown that for a small stress level the influence of dilatancy is fundamentally similar for sand-steel and sand-sand behaviour for a direct shear test. The use of the new parameter describes the influence of surface roughness on stress-dilatancy relationship. The peak strength of sand-steel is analysed. Values of the new parameter grow with normalised roughness for smooth surface and are constant for intermediate and rough surfaces. It is also shown that values of normalised friction coefficient obtained theoretically are similar with those shown in literature.
ACTA SCIENTIARUM POLONORUM - Architectura Budownictwo
Geosciences
Analyzing the results of triaxial compression tests under drained conditions for Erksak sand publ... more Analyzing the results of triaxial compression tests under drained conditions for Erksak sand published in the literature, the stress–dilatancy relationships were described using the frictional state concept. At all phases of shearing, the linear stress ratio–plastic dilatancy relationship can be expressed by the critical frictional state angle and two parameters of the frictional state concept. At failure, dense sand exhibits purely frictional behavior (α = 0, β = 1) and the stress ratio–dilatancy relationship may be correctly described by the Rowe, Bolton, and frictional state concept relationships. Very loose Erksak sand sheared under drained triaxial compression at the ultimate state reaches a stable condition, but the reached stress ratio is significantly smaller than the one at a critical state.
Studia Geotechnica et Mechanica
Calculation of pullout capacity of anchoring concrete cylindrical block by finite element method ... more Calculation of pullout capacity of anchoring concrete cylindrical block by finite element method is carried out. 3D model of the block assumes its free rotation. Alternative solutions with one and two pulling forces attached at different heights of the block are considered. Dependency of the ultimate pulling force on the points of its application, the block’s embedment depth as well as contact friction are investigated. Results of FE analysis and simple engineering estimations are compared. The maximum pullout resistance results from FE analysis when the rotation of the block is prevented.
E3S Web of Conferences
The stress-plastic dilatancy relationship for Toyoura sand sheared under undrained triaxial condi... more The stress-plastic dilatancy relationship for Toyoura sand sheared under undrained triaxial conditions was analysed by use of Frictional State Theory. Under undrained conditions, plastic strain increments are counterbalanced by elastic strain increments. The linear stress ratio-plastic dilatancy relationships at different stages of sand shear were obtained by assuming that Poisson's ratio is a function of shear strain. Contrary to a drained condition, natural state parameter values are not special for characteristic points of sand behaviour under undrained conditions.
International Journal of Civil Engineering
Studia Geotechnica et Mechanica
In this article, the stress–dilatancy relationship for crushed latite basalt is analysed by using... more In this article, the stress–dilatancy relationship for crushed latite basalt is analysed by using Frictional State Theory. The relationship is bilinear, and the parameters α and β determine these two straight lines. At the initial stage of shearing, the mean normal stress increment mainly influences breakage, but at the advanced stage, it is shear deformation that influences breakage. At the advanced stage of shearing, the parameter αpt represents energy consumption because of breakage and βpt mainly represents changes in volume caused by breakage during shear. It is also shown that breakage effect is significant at small stress levels and the η-Dp plane is important to fully understand the stress–strain behaviour of crushed latite basalt in triaxial compression tests.
Studia Geotechnica et Mechanica
Knowledge of the mechanical behaviour of ballast is very important for designing a railway track,... more Knowledge of the mechanical behaviour of ballast is very important for designing a railway track, especially for high-speed lines. The monotonic drained triaxial tests of scaled and fouled ballast presented in literature were analysed using the Frictional State Theory. The stress–plastic dilatancy relationship shows that four characteristic stages of shearing may be specified. The influence of stress level and water content may be quantified by the use of the Frictional State Theory.
Journal of Geotechnical and Geoenvironmental Engineering
Materials, Oct 11, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Applied Sciences, 2022
Many shear strength criteria have been proposed for soils. The Mohr–Coulomb, Matsuoka–Nakai, and ... more Many shear strength criteria have been proposed for soils. The Mohr–Coulomb, Matsuoka–Nakai, and Lade–Duncan criteria are more frequently used for sands. For sands sheared in drained conditions, the general stress–dilatancy relationship is obtained from the frictional state concept. It is shown that, in failure states, the dilatancy for triaxial compression, the plane strain condition (biaxial compression), triaxial extension, and general states can be expressed by the ratio of the volumetric and axial strain increments for triaxial compression. By using the frictional state concept, the shear strength of sand for general states can be expressed by the critical state angle and the dilatancy for drained triaxial compression. It is shown that the calculated shear strength of the sand is similar to that obtained by using the Mohr–Coulomb, Matsuoka–Nakai, and Lade–Duncan criteria for the non-dilative, moderate-dilative, and high-dilative behaviors of sand, respectively. Therefore, the s...
IOP Conference Series: Earth and Environmental Science, 2019
The relationship between total annual precipitation and solar activity (sunspot number) were stud... more The relationship between total annual precipitation and solar activity (sunspot number) were studied based on annual precipitation data from 25 weather stations in Poland that were gathered from 1966 to 2016. The correlation between a yearly sunspot number and a total annual precipitation were analysed by sinusoidal repression analysis. The 5-year smoothest sunspot number and a total annual precipitation for each weather station were taken for final analysis. The parameters of sin curve were calculated by the least square fit method. It is assumed that the frequency is 10.87 years which is a mean spring tidal period of Jupiter and Saturn. The cross correlation between solar activity and total annual precipitation was shown. The difference in year between a minimum yearly sunspot number and a maximum total annual precipitation is assumed as the level of correlation. It is also assumed that high correlation occurs if the difference in question is smaller than 1.5 years, moderate if the difference is higher than 1.5 and smaller than 2.5 years and weak if the difference is higher than 2.5 years. The southern and southwestern regions of Poland give high correlation, central and northern-moderate, and easternweak correlations. The presented analysis may be treated as the first step for a more accurate multi-scale harmonic analysis.
Publikacja jest udostępniona na licencji Creative Commons Uznanie autorstwa-Użycie niekomercyjne-... more Publikacja jest udostępniona na licencji Creative Commons Uznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 4.0 (CC BY-NC-ND 4.0). Pełną treść licencji udostępniono na stronie creativecommons.org/licenses/by-nc-nd/4.0/legalcode.pl. Publikacja jest dostępna w Internecie na stronie Oficyny Wydawniczej PB. Recenzenci: prof. dr hab. inż. Waldemar Świdziński dr hab. inż. Piotr E. Srokosz, prof. UWM Redaktor naukowy dyscypliny inżynieria lądowa i transport: prof. dr hab. inż. Katarzyna Zabielska-Adamska
Basing on Frictional State Theory, the natural state parameter for sand is defined as an extensio... more Basing on Frictional State Theory, the natural state parameter for sand is defined as an extension of state parameter proposed by Been and Jefferies. It is shown that for sand sheared at drained triaxial compression at failure and post-failure, sand behaviour is purely frictional and natural state parameter is ψ° ≈ 0. This parameter can be used for prediction of sand strength and modeling in the future.
IOP Conference Series: Earth and Environmental Science, 2019
IOP Conference Series: Earth and Environmental Science, Dec 1, 2017
In this paper the sand-steel interface behaviour is analysed on the basis of frictional state the... more In this paper the sand-steel interface behaviour is analysed on the basis of frictional state theory. It is shown that for a small stress level the influence of dilatancy is fundamentally similar for sand-steel and sand-sand behaviour for a direct shear test. The use of the new parameter describes the influence of surface roughness on stress-dilatancy relationship. The peak strength of sand-steel is analysed. Values of the new parameter grow with normalised roughness for smooth surface and are constant for intermediate and rough surfaces. It is also shown that values of normalised friction coefficient obtained theoretically are similar with those shown in literature.
ACTA SCIENTIARUM POLONORUM - Architectura Budownictwo
Geosciences
Analyzing the results of triaxial compression tests under drained conditions for Erksak sand publ... more Analyzing the results of triaxial compression tests under drained conditions for Erksak sand published in the literature, the stress–dilatancy relationships were described using the frictional state concept. At all phases of shearing, the linear stress ratio–plastic dilatancy relationship can be expressed by the critical frictional state angle and two parameters of the frictional state concept. At failure, dense sand exhibits purely frictional behavior (α = 0, β = 1) and the stress ratio–dilatancy relationship may be correctly described by the Rowe, Bolton, and frictional state concept relationships. Very loose Erksak sand sheared under drained triaxial compression at the ultimate state reaches a stable condition, but the reached stress ratio is significantly smaller than the one at a critical state.
Studia Geotechnica et Mechanica
Calculation of pullout capacity of anchoring concrete cylindrical block by finite element method ... more Calculation of pullout capacity of anchoring concrete cylindrical block by finite element method is carried out. 3D model of the block assumes its free rotation. Alternative solutions with one and two pulling forces attached at different heights of the block are considered. Dependency of the ultimate pulling force on the points of its application, the block’s embedment depth as well as contact friction are investigated. Results of FE analysis and simple engineering estimations are compared. The maximum pullout resistance results from FE analysis when the rotation of the block is prevented.
E3S Web of Conferences
The stress-plastic dilatancy relationship for Toyoura sand sheared under undrained triaxial condi... more The stress-plastic dilatancy relationship for Toyoura sand sheared under undrained triaxial conditions was analysed by use of Frictional State Theory. Under undrained conditions, plastic strain increments are counterbalanced by elastic strain increments. The linear stress ratio-plastic dilatancy relationships at different stages of sand shear were obtained by assuming that Poisson's ratio is a function of shear strain. Contrary to a drained condition, natural state parameter values are not special for characteristic points of sand behaviour under undrained conditions.
International Journal of Civil Engineering
Studia Geotechnica et Mechanica
In this article, the stress–dilatancy relationship for crushed latite basalt is analysed by using... more In this article, the stress–dilatancy relationship for crushed latite basalt is analysed by using Frictional State Theory. The relationship is bilinear, and the parameters α and β determine these two straight lines. At the initial stage of shearing, the mean normal stress increment mainly influences breakage, but at the advanced stage, it is shear deformation that influences breakage. At the advanced stage of shearing, the parameter αpt represents energy consumption because of breakage and βpt mainly represents changes in volume caused by breakage during shear. It is also shown that breakage effect is significant at small stress levels and the η-Dp plane is important to fully understand the stress–strain behaviour of crushed latite basalt in triaxial compression tests.
Studia Geotechnica et Mechanica
Knowledge of the mechanical behaviour of ballast is very important for designing a railway track,... more Knowledge of the mechanical behaviour of ballast is very important for designing a railway track, especially for high-speed lines. The monotonic drained triaxial tests of scaled and fouled ballast presented in literature were analysed using the Frictional State Theory. The stress–plastic dilatancy relationship shows that four characteristic stages of shearing may be specified. The influence of stress level and water content may be quantified by the use of the Frictional State Theory.
Journal of Geotechnical and Geoenvironmental Engineering