Comparison of Physical and Computational Experiment Results to Determine the Load-Bearing Capability of a Uniform Plate Bed

Bogomolov, Aleksandr; Богомолова, Оксана

doi:10.1007/s11204-016-9348-x

Cited by 3 publications

(11 citation statements)

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“…A comparison of the plastic areas, determined experimentally by other researchers independently of us, with the plastic areas, the construction of which is carried out on the basis of the mixed problem analytical solution for the experimental conditions, will be carried out. It should be noted that the authors with all their efforts failed to find the analytical expressions similar to those given in [3][4][5][6], with the help of which it would be possible to construct plastic domains for the conditions of the theory of elasticity and the theory of soil plasticity mixed problem in the scientific literature. Therefore, the results of the experiments were "calculated" using the computer programs [7][8], developed with the participation of one of the authors.…”

Section: Purpose Of the Workmentioning

confidence: 99%

“…Therefore, the results of the experiments were "calculated" using the computer programs [7][8], developed with the participation of one of the authors. These programs formalized: to determine the stress state of the soil massifthe finite element method, and to construct plastic areas -the Coulomb plasticity condition and an approximate analytical solution of the theory of elasticity and the theory of soil plasticity mixed problem [3][4][5][6].…”

Section: Purpose Of the Workmentioning

confidence: 99%

“…The second technique we used when writing this article is based on an approximate analytical solution of the theory of elasticity and the theory of soil plasticity [3][4][5][6] mixed problem, the results of which are presented below.…”

Section: Introductionmentioning

confidence: 99%

“…In the works [3][4][5][6] it is shown that the stresses at the points of the plastic area (marked with a prime) are calculated by the formulas…”

Section: Introductionmentioning

confidence: 99%

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Construction of plastic deformation areas in a homogeneous base of strip foundation

Богомолова

Zhidelev

2021

E3S Web Conf.

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The article discusses two approaches to the question of plastic deformations constructing areas in a homogeneous baseof a strip foundation: a trivial approach based on the use of the Coulomb plasticity condition, and the approach proposed by the authors based on the approximate analytical solution of the theory of elasticity and the theory of soil plasticity mixed problem. It has been established that the “Coulomb” regions, which originally generated under the edges of the strip load, close under the basement as it increases and form a single crescent-shaped plastic area. Plastic areas built on the basis of a mixed solution develop inward and outward from the foundation. Their closure under the foundation occurs at the beginning of the soil uplift process under the foundation, which is accompanied by the appearance of deep heaving zones (Fig. 8; 9). All other things being equal, the “Coulomb” regions are much larger in size and extend to a greater depth than the regions constructed on the basis of a mixed solution of the theory of elasticity and the theory of soil plasticity problem. The elastic soil core, enveloped by “Coulomb” plastic areas, has a shape close to the shape of a half ellipse or a curved trapezoid, and, alternatively, has the shape of an isosceles triangle with concave lateral sides. If we construct the regions of plastic deformations at the base of a strip foundation using the Coulomb plasticity condition, or apply a solution to a mixed problem, then, all other things being equal, the sizes of the “Coulomb” regions, the “rate” of their development and sensitivity to changes in the value of the lateral pressure coefficient of the soil will always be more than in the alternative case. If the value of the ultimate load is taken as its value corresponding to the closure of the plastic areas under the foundation, then the mixed solution of the theory of elasticity and the theory of plasticity of soils problem gives higher (≥500%) the values of the latter. When finding the value of the bearing capacity of the strip foundation base, it is recommended to apply the solutions of the corresponding problems in the elastoplastic (mixed) formulation, since their results, and this has been shown in the work, are in satisfactory agreement with the experimental data.

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Section: Purpose Of the Workmentioning

confidence: 99%

Section: Purpose Of the Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In the works [3][4][5][6] it is shown that the stresses at the points of the plastic area (marked with a prime) are calculated by the formulas…”

Section: Introductionmentioning

confidence: 99%

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Construction of plastic deformation areas in a homogeneous base of strip foundation

Богомолова

Zhidelev

2021

E3S Web Conf.

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“…Для большей достоверности получаемых результатов в качестве исходных данных при проведении численного моделирования использованы сведения об экспериментальных ис-следованиях, выполненных сторонними авторами [15,16]. Отметим, что величины предельно допустимых нагрузок, полученные при проведении модельных экспериментов [15,16], с по-грешностью 5-40 % совпадают с аналогичными величинами, полученными при помощи рас-четов по программам 2 для тех же условий, а формы пластических областей практически сов-падают [1,6]. При проведении численного эксперимента считаем, что величина предельно допус-тимой нагрузки на основание достигается в тот момент, когда происходит смыкание об-ластей пластических деформаций (ОПД) под фундаментом.…”

Dependence of Maximum Permissible Load on Physical-Mechanical Properties of Stamp Homogeneous Base in Mixed Problem

Bogomolov¹,

Богомолова²,

Подтелков³

et al. 2017

PNRPU CA Bulletin

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The geotechnical modeling of interaction between a large-sized lowered structure and heterogeneous soil environment in the process of embedment

Perminov

2022

Vestnik MGSU

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Introduction. The use of extremely deep and large underground spaces in case of complex geoengineering and hydrogeological conditions is a challenging geotechnical task. The accumulated experience of using the embedment method, that entails the construction of a geotechnical and hydrotechnical enclosure, which is at the same time a reliable bearing structure, has proven a strong technical and economic potential and good prospects for expanding the scope of its application. The study of interaction between large-sized reinforced concrete shells at the stages of their construction in heterogeneous soil environments allowed expanding the scope of their rational use in the subterranean construction that deals with transport and engineering infrastructure facilities. The defect-free construction of a subterranean structure of this type requires a consolidated solution for complex nonlinear design and geotechnical problems. Materials and methods. The non-stationarity of processes of interaction between a massive structure and the soil environment, as well as the heterogeneity of the environment itself necessitate the development of methods of adaptive control over the stress-strain state of the system that encompasses “a large gravitational body and the heterogeneous environment”. The consolidated geotechnical and structural analysis allows simulating processes of interaction between the shell and the soil environment and prognosticating the parameters of adaptive control over the stress-strain state of the system. Results. The application of adaptive stress-strain control methods lays the groundwork for a defect-free lifecycle of a structure at the stages of its construction and operation in problematic soils under man-induced impacts. Conclusions. Unlike the traditional approach, the method, proposed by the author, encompasses the fundamentals of a new concept for assessing the interaction between large-sized structures, embedded in variable strength soils, taking into account the irregularity of the embedment mode and results of its practical implementation focused on the geotechnical support of a defect-free life cycle of unique large-sized subterranean structures at the construction stage.

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Comparison of Physical and Computational Experiment Results to Determine the Load-Bearing Capability of a Uniform Plate Bed

Cited by 3 publications

References 1 publication

Construction of plastic deformation areas in a homogeneous base of strip foundation

Construction of plastic deformation areas in a homogeneous base of strip foundation

Dependence of Maximum Permissible Load on Physical-Mechanical Properties of Stamp Homogeneous Base in Mixed Problem

The geotechnical modeling of interaction between a large-sized lowered structure and heterogeneous soil environment in the process of embedment

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