scholarly journals Stress-strain state of the soil mass under the uniformly distributed load action adjacent to a vertical excavation

2021 ◽  
Vol 1083 (1) ◽  
pp. 012015
Author(s):  
Z G Ter-Martirosyan ◽  
I N Luzin ◽  
Yu V Vanina ◽  
A Z Ter-Martirosyan
Keyword(s):  
Strain State ◽  
Soil Mass ◽  
Stress Strain ◽  
Stress Strain State ◽  
Distributed Load ◽  
Uniformly Distributed Load ◽  
Load Action ◽  
Vertical Excavation

scholarly journals ON ONE NUMERICAL METHOD FOR THE COMPUTING OF SEDIMENTATION OF THE SURFACE OF THE SOIL MASSIVE CAUSED BY THE CONSTRUCTION OF THE SHELL LINING OF THE TUNNEL

2018 ◽  
Vol 14 (1) ◽  
pp. 78-91
Author(s):  
Sergey B. Kosytsyn ◽  
Vladimir Y. Akulich
Keyword(s):  
Analytical Solution ◽  
Numerical Method ◽  
Strain State ◽  
Soil Mass ◽  
Stress Strain ◽  
Stress Strain State ◽  
The Earth ◽  
Surrounding Soil

The distinctive work is aimed at the geotechnical forecast of the influence of the construction of the tunnel on the change in the stress-strain state of the surrounding soil mass, namely, the precipitations that arise on the surface of the earth. The work assumes both a numerical and an analytical solution with subsequent com-parative analysis

scholarly journals Stress-strain state analysis of the design of full-turning vertical empennage for aero-spacecraft

2021 ◽  
Vol 22 (1) ◽  
pp. 36-42
Author(s):  
Andrey A. Chistyakov ◽  
Valery P. Timoshenko
Keyword(s):  
Numerical Simulation ◽  
Strain State ◽  
Dynamic Pressure ◽  
Operating Conditions ◽  
Structural Scheme ◽  
Stress Strain ◽  
Mechanical Loads ◽  
Stress Strain State ◽  
Distributed Load ◽  
Calculation Results

In this work, the most rational schemes to designing the skin of a full-turning vertical empennage element (stabilator) have been studied. Skin designing schemes were chosen according to aero-spacecraft operating conditions in the re-entry trajectory. During designing process, the requirements for reusable structures of tourist-class aero-spacecrafts were taken into account, such as: maximum simplicity and endurance of the product. To determine the mechanical loads acting on the keel during its movement in the air, a numerical simulation of the aerodynamic flow-around the stabilator profile at 5 arbitrary points on the flight path was carried out. The parameters used for the analysis are: flight velocity, density and viscosity of the air. Of the 5 obtained fields of dynamic pressure acting on the stabilator, the field that creates the largest distributed load was used as the boundary condition for the analysis of the stress-strain state of the structure. The problem of mechanical loading of the stabilator was solved separately for each of the previously studied structural schemes of the skin. Based on the obtained calculation results the optimal skin structural scheme was chosen by comparing the displacements on the line connecting ribs.

scholarly journals NUMERICAL DESIGN OF FRAME BUILDINGS TAKING INTO ACCOUNT THE GENERALIZED STIFFNESS AND LOAD OF SOIL AND FOUNDATION

2019 ◽  
pp. 34-46 ◽  
Author(s):  
E. Kuzhahmetova
Keyword(s):  
Pile Foundation ◽  
Strain State ◽  
Soil Mass ◽  
Reference Points ◽  
Industrial Building ◽  
Stress Strain ◽  
Building Model ◽  
Stiffness Coefficients ◽  
Stress Strain State ◽  
Definition Of

The article is devoted to the improvement of methods for calculating buildings as large finite element systems and implements approaches that provide a definition of the overall picture of the stress - strain state of a designed building (structure) in parts, including its structural units and a pile foundation. The article contains a description of the methodology, the essence of which is to bring the stiffness of the pile foundation in the form of single piles (for example, under the columns of a frame of a public, residential or industrial building) and the adjacent soil mass, to the supporting points of interaction of the piles with the building. Generalized stiffness coefficients of the pile, obtained taking into account the soil with different deformation characteristics, are entered into the general matrix of the building for the subsequent determination of its stress - strain state and stability. At the final stage of moving the reference points of the building, it is possible to calculate the characteristics of the stress - strain state of the pile in the ground. In this article (part 1), the generalized stiffness coefficients of the pile are obtained taking into account the types of soil (sand and clay) with physical and mechanical characteristics selected from regulatory documents. The calculations are performed using the FEMAP with NX NASTRAN software package. The material on the structuring of the building model is supposed to be published in the subsequent parts of this article

scholarly journals The stress-strain state of the soil body in the quarter plane subjected to the strip load

Vestnik MGSU ◽  
2020 ◽  
pp. 1505-1512
Author(s):  
Zaven G. Ter-Martirosyan ◽  
Yuliya V. Vanina
Keyword(s):  
Analytical Solution ◽  
Quantitative Evaluation ◽  
Strain State ◽  
Numerical Solutions ◽  
Vertical Wall ◽  
Stress Strain ◽  
Good Convergence ◽  
Stress Strain State ◽  
Distributed Load ◽  
Quarter Plane

Introduction. The construction of high-rise buildings, having elaborated substructures located inside deep excavations, entails a quantitative evaluation of the stress-strain state (SSS) of soils beyond the excavation wall with regard for the interaction with the surrounding built-up area and conditions of the contact with the enclosure structure. The paper analyzes the effect of distributed load p = const over a horizontal area having width b = 2a at the distance of с < a from the edge of a rectangular profile wall, which causes a non-uniform stress-strain state in the soil body having the shape of a quarter plane. It is assumed that the vertical wall is fixed with sprung structures, although vertical displacement of soil is acceptable. Materials and methods. The analytical solution to the problem of the effect of the distributed load on the horizontal soil body having the shape of a quarter plane is based on a well-known solution to the plane elastic problem designated for the half-space subjected to load p = const distributed over a strip. MathCAD software (SW) was employed to obtain the analytical solution; PLAXIS 2D software was used to obtain the numerical solution. Results. Analytical and numerical methods were applied to solve the problem of exposure of a horizontal soil body, having the shape of a quarter plane, to a distributed load. A comparative assessment and analysis of the stress strain state values were performed. Conclusions. Analytical and numerical solutions demonstrate good convergence pursuant to the analysis of the results. Therefore, further development of new methods for the quantitative evaluation of the stress strain state of the soil body based on the existing theoretical solutions is one of the main challenges to be tackled in advanced design of beddings and foundations.

scholarly journals MODELLING OF THE EFFECTS OF THE ENVIRONMENTAL-GEOPHYSICAL STATE OF SOILS ON ENGINEERING BUILDING OBJECTS

2020 ◽  
pp. 97-103
Author(s):  
Yu. Starodub ◽  
A. Havrys ◽  
O. Kozionova
Keyword(s):  
Strain State ◽  
Mathematical Formulation ◽  
Soil Layer ◽  
Soil Mass ◽  
Negative Influence ◽  
Stability Study ◽  
Bridge Engineering ◽  
Stress Strain ◽  
Engineering Structures ◽  
Stress Strain State

The article deals with the method of the reaction modelling of soil strata under engineering objects to ecological and geophysical state in the problems of studying the negative influence of loads on a stress-strain state of soil under engineering objects. The problem of stability study is considered and the behaviour of soil in a vicinity of bridge-engineering structures is investigated. To solve the problems of emergency protection, a method of modelling the reaction of the soil layer under the load on the engineering objects due to tectonic influences to study the stress-strain state of the ground crust in a vicinity of engineering objectsis used. An algorithm of the finite element method in the problem of studying the stress-strain state of soil base under engineering objects has been developed. The physical and mathematical formulation of the problem is carried out. The modelling problem is solved by test cases. Models of continuous environment of functioning engineering structures for which stress-strain characteristics of the soil massif modelled are developed. The theoretical definition and modelling of critical values of the stress-strain state of the soil mass under the influence of loads are carried out. Modelling allows to predict the nature of the influence of mechanical processes on the ecological and geophysical state of the environment and to study the stability of engineering structures. Stress-deformation processes of the rock massif are investigated, as a result of which emergencies of natural and man-made characters can arise.

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