Experimental study of the stability and stress-strain state of three-layer fiberglass shells under hydrostatic pressure

1975 ◽  
Vol 7 (7) ◽  
pp. 868-871
Author(s):  
V. S. Bochkovskii ◽  
A. G. Girchenko ◽  
O. A. Goroshko ◽  
I. K. Koshevoi ◽  
A. F. Romanchenko ◽  
...  
Keyword(s):  
Experimental Study ◽  
Hydrostatic Pressure ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State ◽  
The Stability

scholarly journals Peculiarities of the stress-strain state of the “excavation – geo-environment” and “embankment – geo-environment” systems in the process of erecting them (part II)

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Mikhail Krasnov ◽  
Nikolay Gorshkov ◽  
Yuan Jingwen ◽  
Svetlana Jdanova
Keyword(s):  
Finite Elements ◽  
Strain State ◽  
Common Ground ◽  
Displacement Vector ◽  
Limit State ◽  
The Body ◽  
Volume Deformation ◽  
Stress Strain ◽  
Stress Strain State ◽  
The Stability

Excavations and embankments are the most common ground transport structures, operational reliability and durability of which is determined by the stability of their sides and slopes. The first article deals with the features of stress-strain state and changes in stability of ground transport structures (excavations) based on modeling according to the certified program of finite element method GenIDE32. At modeling the layer-by-layer excavation of homogeneous soil from excavations with finite geometrical sizes was carried out. In the excavation edge array, in the field of displacement vector ui, appeared are poorly studied phenomena in the form of «rotation circles» or short vortices. These phenomena, discovered in model experiments (Yu.I. Soloviev, 1956), require detailed research in the future. Graphic results of the calculations performed allow one to see the appearance and development of zones of «plasticity» or limit state in the form of zones of «shift-compression», «compression-shift» and «stretching». Shift-compression zones and vice versa are shown as shaded finite elements at an angle crosswise, while stretch zones are shown as shaded vertically, horizontally and vertically, and horizontally finite elements. These zones, in the process of modeling, are drawn in the edges of the projections of a slide with vertical and horizontal cracks. The contours of the landslide prisms show themselves well when the average relative volume deformation values of ε are displayed on the screen. The display of this value in two colors defines the landslide contours in this figure. Sliding lines with the minimum value of the stability coefficient kst min pass near the borders, where values of this parameter are equal to zero. In this figure, in the upper part of the array, you can see the places where vertical cracks are formed. The analysis also uses graphs of stress-strain state trajectories in the space of stress tensor invariants σij and relative deformations εij in significant nodes and finite elements, located, including, in places of sliding lines with kst min. They make it possible to see from the volume and shape deformation graphs where the system with the calculated condition is located, for example, from the condition at which the body of the landslide was formed.

scholarly journals The stressstrain state of low-head dams’ basis on stratified soil

2016 ◽  
Vol 3 ◽  
pp. 4-9
Author(s):  
Paluanov D.T.
Keyword(s):  
Hydrostatic Pressure ◽  
Strain State ◽  
Soil Base ◽  
Stress Strain ◽  
Stress Strain State ◽  
Low Head ◽  
Calculated Model

This article is considered stress-strain state of low-head dams’ basis on stratified soil. The peculiarities of construction of low-head dams on stratified soils are resulted. The calculated model for the solution of the stress-strain state of low-head dams’ basis is resulted. The calculations of the stress-strain state of soil base under the weight of the constructions and the hydrostatic pressure of water the upstream dam are established.

scholarly journals Geodynamic risks of mining in highly stressed rock mass

2019 ◽  
Vol 129 ◽  
pp. 01011
Author(s):  
Arkadiy Shabarov ◽  
Anton Kuranov ◽  
Anton Popov ◽  
Sergey Tsirel
Keyword(s):  
Strain State ◽  
Fault Zones ◽  
Main Attention ◽  
Mining Operations ◽  
Stress Strain ◽  
Specific Strength ◽  
Near Fault ◽  
Stress Strain State ◽  
Structure Assessment ◽  
The Stability

The paper discloses that geological faults and phenomena associated therewith are the main risks of mining. The phenomena of fault activity and specific features of near-fault zones, determining their impact on the stability of mine workings and other man-made objects are discussed in detail. Different sections of faults are classified according to the degree and types of risk. The main attention is paid to the most stressed zones, where the fault is a closely spaced crack in the rock, characterized by specific strength and rock-bump hazard effect. The paper discloses that although mining operations change the stress-strain state of the massif, nonetheless, most of hazardous situations and geodynamic phenomena during excavation occur in tectonically stressed zones that already existed in the massif. In these areas, man-made overload during mining results to the formation of extremely stressed geodynamically hazardous zones. Thus, geodynamic zoning, which includes the identification of faults and block structure, assessment of their activity, as well as reconstruction of the stress-strain state of both the blocks and the near-fault zones, is the key method for assessing risks of geodynamic phenomena.

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