УДК 69

Stress-strain state of an inclined base in interaction with a cross-stand foundation of variable width, taken into account of the influence of design solutions of the building

Комнатный Кирилл Григорьевич — аспирант кафедры Геотехники и конструктивных элементов зданий Федерального государственного автономного образовательного учреждения высшего образования «Крымский федеральный университет имени В.И. Вернадского», Академия строительства и архитектуры.

Abstract: This research paper examines the characteristics of the stress-strain state of an inclined foundation when working with a cross-strip foundation of variable width, with special attention paid to the importance of understanding the design features of different objects. Now in Russia this model of building construction is often implemented, which means correct calculations and safety assessment of such projects are required.

Аннотация: в этой исследовательской работе рассмотрены характеристики напряженно-деформированного состояния наклонного основания при работе с перекрестно-ленточным фундаментом переменной ширины, при этом особое внимание уделено важности понимания конструктивных особенностей разных объектов. Сейчас в России часто реализуется эта модель возведения зданий, а значит требуется правильный расчет, оценка безопасности таких проектов.

Keywords: cross-strip foundation, structural elements of objects.

Ключевые слова: перекрестно-ленточный фундамент, конструктивные элементы объектов.

The purpose of the study: to analyze the theoretical and practical aspects of such a concept as the stress-strain state of an inclined base with a cross-ribbon foundation of a building, as well as to give general recommendations for improving the stability of building structures when implementing this approach (in order to improve strength characteristics, increase the safe operation of the facility).

The problem of research: to date, such a characteristic as the stress-strain state of the inclined base of a building has hardly been studied, which is an important disadvantage in civil engineering in the country; there are clear prospects for creating a building with a strong cross-ribbon foundation with variable width, however, for their implementation, a detailed study of the force interaction of different structural elements is necessary, taking into account there are many interrelated parameters and unique features.

Research method: to achieve this research goal, it is necessary to perform a comprehensive analysis of scientific papers on the topic "Stress-strain state of an inclined base in interaction with a cross-ribbon foundation of variable width, taking into account the influence of structural solutions of the building"; the author of the dissertation studied the literature of domestic scientists: M.Yu. Abelev, A. B. Vronsky, V.L. Dedov, I.M. Doroshkevich. At the same time, the issues of changing the force interaction of the "inclined base and cross-ribbon foundation" system under different types of loads remain open.

Introduction

Due to the currently actively developing construction industry, the multiple increase in the volume of construction of buildings and structures, there is a need for a suitable and reliable foundation for work. The relevance of the research topic is justified by the acute shortage of free, suitable for building areas with a horizontal, flat surface and foundations on the territory of the Republic of Crimea. Which is also complicated by the presence of slopes, depressions, ravines in these territories. In such conditions, the most effective is the installation of a cross-ribbon foundation used in the construction of buildings on inclined bases.

The construction of cross-beam foundations for use on bases with complex engineering and geological features has a number of features that are caused by the manifestation of changes in the stress-strain state of the soil base and the foundation structure during load distribution. However, due to the insufficient number of studies of VAT bases and foundations located on inclined bases, existing calculation methods do not take into account the specifics of the interaction of the "base — foundation" system.

As a result of the interaction of the foundation structure with the foundation, an uneven deformation occurs, as well as a stress-strain state. Solving the above issues will make it possible to use the construction of cross—ribbon foundations in conditions of difficult terrain more efficiently, thereby reducing the cost of work. The aim pursued in this study is to identify the features of the change in the emerging stress-strain state and to clarify the methodology for calculating an inclined soil base in its interaction with a cross—belt one.

The main objectives of the research work:

conducting a study of the interaction of possible models of cross — band foundations with a variable width of the sole with a soil base at different angles of inclination of the base;
identification of the features of changes in emerging pressures in the soil base when changing the width of the sole of the cross — band foundation, in the direction of the slope;
clarification of the methodology for calculating cross —band foundations on slopes, taking into account the change in the width of the base of the foundation and the load affecting it created by the above-foundation structure of the building;
determination of the features of the manifestation of emerging deformations of the soil base, when changing the width of the sole of the cross — band foundation.

The scientific novelty of the tasks performed in the dissertation consists in clarifying the computational model of the interaction of cross—band foundations having a variable width of the base sole with an inclined base based on the actual stress-strain state. The expected results are the refinement of the methodology for calculating cross—band foundations on slopes, taking into account the change in the width of the sole of the foundation and the structure of the building, the refinement of the computational model of the interaction of cross—band foundations having a variable width of the sole of the base with an inclined base in the stress-strain state of the base.

Separately, it is worth considering the concept and features of the stress-strain state. It is a set of directional loads or mechanical effects (stresses and deformations) that are formed in the presence of external loads, temperature changes and other factors in relation to a material body. That is, the object is experiencing constant external influence, which is the reason for the gradual destruction and deformation of the structure. The inclined base is closely related to the influence of low-cycle loads on the foundation-ground system and is associated with changes in the stress-strain state of the two elements. According to the results of recent experts, under these conditions, the sediment of the foundation increases, the density of the soil under the central part of the sole increases, and the area of the directional pressure zone becomes larger. In most cases, the cause of the effect is a change in the angle of inclination and the level of compressive stresses in a narrow zone (redistribution of normal contact stresses with an increase in total forces under the middle part of the foundation sole). The building design process must necessarily take into account the stress-strain state of the inclined base when interacting with any (and not only cross-ribbon) foundation of the object.

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