Basic features of soil structure interface behaviour

1989 ◽  
Vol 26 (6) ◽  
pp. 303
Keyword(s):  
Soil Structure ◽  
Basic Features ◽  
Interface Behaviour

scholarly journals The soil cover structure and elementary soil areas of the Opillia

2017 ◽  
pp. 390-398 ◽  
Author(s):  
Taras Yamelynets ◽  
Mykola Fedotikov
Keyword(s):  
Soil Structure ◽  
Soil Cover ◽  
Contrast Ratio ◽  
Study Results ◽  
Relief Sculpture ◽  
Soil Cover Structure ◽  
Basic Parameters ◽  
Basic Features ◽  
Quantitative Indicators ◽  
Qualitative And Quantitative Characteristics

For studying the soil cover structure of Opillia region, we used methods for the identification (natural-cartometric, relief sculpture, quality-genetic) and interpretation (statistical cartometric, functional and analytical) of the soil cover structure. The natural-cartometric method was used to characterize elementary soil areas of the key area, what makes it possible to determine the parameters of the soil structure and obtain quantitative indicators for the key elementary soil areas parameters, which are: elementary soil areas composition and area ratio, complexity, fractionality, breakdown, contrast ratio and heterogeneity. This article is devoted to the study results of qualitative and quantitative characteristics of elementary soil areas of the Opillia within Khodorivsko-Buchatskyi region, hereinafter Khodorivsko- Buchatske Opillia. With coefficient of the differentiation of the soil outlines and methods of variation statistics were identified and analyzed the degree of variability ESA areas. The degree of tortuosity and elongation of area limits using the coefficient of the dismemberment were studied. Investigated the character of outlines of elementary soil areals within the area of research. Identified the basic features of ESA borders depending on various environmental factors. The certain laws of changing of the basic parameters of elementary soil areas, which form the soil structure of Khodorivsko- Buchatske Opillia were determined and described in the article. Key words: elemental soil areal (ESA), soil structure (SS), coefficient of the differentiation of the soil outlines (CDSO), coefficient of dismemberment (CD), coefficient of variability (CV).

Numerical studies of soil–structure interaction using a simple interface model

1988 ◽  
Vol 25 (1) ◽  
pp. 158-162 ◽  
Author(s):  
D. V. Griffiths
Keyword(s):  
Soil Structure ◽  
Full Range ◽  
Interface Roughness ◽  
Soil Structure Interaction ◽  
Upper And Lower Bounds ◽  
Rational Approach ◽  
Interface Model ◽  
Closed Form Solutions ◽  
Structure Interaction ◽  
Interface Behaviour

The effect of interface roughness in problems of soil–structure interaction is demonstrated using a simple finite element interface model. Three examples of geotechnical interest are presented to demonstrate the approach, and comparisons are made with closed-form solutions where available. Both rough and smooth extremes of interface behaviour are analysed. The smooth interface modelling is performed without the use of specialized elements, and involves uncoupling and rotation of freedoms parallel to the proposed interface direction. It is suggested that, in view of the uncertainties often associated with interface properties, a rational approach for engineering purposes is to obtain solutions for the perfectly rough and perfectly smooth cases leading to upper and lower bounds on the full range of interface behaviour. Key words: finite elements, interfaces, soil–structure interaction, foundations, lateral loads, culverts, piles.

scholarly journals Thermal effects on mechanical behaviour of soil–structure interface

2020 ◽  
Vol 57 (1) ◽  
pp. 32-47 ◽  
Author(s):  
Soheib Maghsoodi ◽  
Olivier Cuisinier ◽  
Farimah Masrouri
Keyword(s):  
Shear Strength ◽  
Mechanical Behaviour ◽  
Soil Structure ◽  
Clayey Soil ◽  
Normal Load ◽  
Shear Characteristics ◽  
Constant Normal Stiffness ◽  
Constant Normal Load ◽  
Dense State ◽  
Interface Behaviour

Mechanical behaviour of the soil–structure interface plays a major role in the shear characteristics and bearing capacity of foundations. In thermoactive structures, due to nonisothermal conditions, the interface behaviour becomes more complex. The objective of this study is to investigate the effects of temperature variations on the mechanical behaviour of soils and the soil–structure interface. Constant normal load (CNL) and constant normal stiffness (CNS) tests were performed on the soil and soil–structure interface in a direct shear device at temperatures of 5, 22, and 60 °C. Fontainebleau sand and kaolin clay were used as proxies for sandy and clayey soils. The sandy soil was prepared in a dense state and the clayey soil was prepared in a normally consolidated state. Results show that the applied thermal variations have a negligible effect on the shear strength of the sand and sand–structure interface under CNL and CNS conditions, and the soil and soil–structure interface behaviour could be considered thermally independent. In clay samples, an increase in the temperature increased the cohesion and consequently the shear strength, due to thermal contraction during heating. The temperature rise had less impact on the shear strength in the case of the clay–structure interface than in the clay samples. The adhesion of the clay–structure interface is less than the cohesion of the clay samples.

scholarly journals The elementary soil areas of the Mykolaiv-Horodok Opillia

2016 ◽  
pp. 386-394
Author(s):  
Mykola Fedotikov ◽  
Taras Yamelynets
Keyword(s):  
Soil Structure ◽  
Coefficient Of Variability ◽  
Quantitative Characteristics ◽  
Relief Sculpture ◽  
Basic Parameters ◽  
Basic Features ◽  
Form Degree ◽  
Quantitative Indicators ◽  
Contrast Range ◽  
Qualitative And Quantitative Characteristics

During the investigation of soil structure of Mykoliv-Horodok Opillia we used the methods of detection (natural-cartometric, relief sculpture, quality-genetic) and interpretation (statistical cartometric, functional and analytical) of the soil structure. To characterize elementary soil areas of the key area the natural-cartometric method was used, it makes it possible to determine the parameters of the soil structure and obtain quantitative indicators for the key elementary soil areas (ESA) parameters, which are elementary soil areas composition and area ratio, complexity, fractionality, breakdown, heterogeneity and contrast range. The article presents results of a study of qualitative and quantitative characteristics of elementary soil areas of the Mykolaiv-Horodok Opillia. The degree of variability of ESA areas was identified and analysed with coefficient of the differentiation of the soil outlines and methods of variation statistics. Form, degree of tortuosity and elongation of area limits using the coefficient of the dismemberment were studied. The character of outlines of elementary soil areas within the area of research was investigated. The basic features of ESA borders depending on various environmental factors are identified. Certain laws of changing of the basic parameters of elementary soil areas, which form the soil structure of Mykolaiv-Horodok Opillia were traced. Key words: elementary soil area, structure of the soil cover, coefficient of variability of soil outlines, coefficient of the differentiation of the soil outlines, coefficient of the dismemberment of the soil boundaries.

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