Problems of Forecasting the Resource of Buildings of the Historical Construction of the Resort Region of the Caucasian Mineral Waters

Pshenichkina, V. A.; Shchitov, Dmitry; Sidyakin, P A

doi:10.1088/1757-899x/463/3/032027

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…Если грунт основания однороден, а фундамент сооружения может рассматриваться как жесткая плита, то для расчета системы «сооружение -основание» применима модель грунта в виде упругого полупространства. Во время землетрясения плита фундамента перемещается по шести степеням свободы, включающим по три компоненты поступательного движения и вращения [9][10][11][12]. Данная модель используется для расчета специальных инженерных сооружений (атомных станций, плотин и др.…”

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Influence of the foundation bed stiffness on the dynamic properties of the building as of a multi-mass cantilever bar

Pshenichkina

Александровна²,

Drozdov

et al. 2020

Struct. Mech. of Eng. Const. and Build

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Relevance. The study of the interaction of buildings and structures with the base during an earthquake is one of the most important tasks of the theory of earthquake resistance. The response of the structure to seismic impact depends to a large extent on the ratio of the stiffness characteristics of the soil, foundation, and foundation structure. Moreover, taking into account a rather high degree of statistical variability of the characteristics of the soil foundation, it is possible to ensure the required level of safety of a structure only through the use of probabilistic models and a quantitative assessment of the reliability of the construction-base system as a whole. At present, for the calculation of the construction - base system for seismic loads, deterministic discrete models of the finite element method are mainly used. But these models are poorly adapted for probabilistic calculations and require extensive statistical data, which are currently insufficient. Therefore, in problems of reliability assessment, it is advisable to use simplified analytical models, which make it possible to derive the value of the statistical variability of its reaction with relatively small initial information about the system. The aim of the work - based on the well-known solution for the single-mass model to present an analytical solution in the matrix form of the problem of free horizontal vibrations of a multi-mass cantilever rod on the foundation specified by the elastic half-space model. Methods. A study was made of the effect of the compliance of the soil foundation on the frequencies and forms of horizontal vibrations of the structure. A comparison of the results with the calculation performed by the finite element method is given. Results. The obtained solution is intended to conduct a probabilistic calculation of the construction-base system under seismic loads and evaluate its reliability.

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Influence of the foundation bed stiffness on the dynamic properties of the building as of a multi-mass cantilever bar

Pshenichkina

Александровна²,

Drozdov

et al. 2020

Struct. Mech. of Eng. Const. and Build

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Assessment of Stability of Mining Departments Under Impact Loads

Liashok¹,

Podkopaiev²,

Konopelko³

et al. 2020

JDMI

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Purpose of work. The purpose of the research is to determine the conditions for ensuring the stability of mine workings in the coal massif under the action of shock loads. Methods. To achieve this goal, analytical studies were performed using the basic provisions of classical mechanics and the theory of elasticity. In laboratory studies, experimental samples of crushed rock were used, which were placed in a steel cylinder. Results. In the course of experimental research, the influence of the impact force and the impact pulse of the falling load on the response of the plane on a pliable basis with inhomogeneous, piece-sized, fragmented rock was studied. It is recorded that at a constant amount of energy of a single impact (mgH = 14.7 J), when the height of the fall of the load decreases 3 times (from H = 1.5 m to H = 0.5 m), and the mass increases from m = 1.0 kg to m = 3.0 kg, the magnitude of the impact force is reduced by 50%. With an increase in the amount of energy of a single impact (from mgH = 4.9 J to mgH = 44.1 J) at the same height of fall, when the mass of the load increases threefold, there is an increase of 2.5 times the impact force. At a constant amount of energy of a single impact (mgH = const), the displacement of the plane on a pliable base of crushed rock depends on the magnitude of the impact pulse of the falling load. Novelty. It is proved that when there is collapse of lateral rocks in the coal massif containing the production, the force of impact on the surface is proportional to the time of fall of the rock blocks to the time of their impact interaction with the plane. Practical significance. In deep coal mines, as a result of mining and the probability of shock loads from landslides, to ensure the stability of mine workings in excavation sites, it is advisable to use pliable supports or filling the produced space with crushed rock, which will ensure the integrity of lateral rocks.

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Problems of Forecasting the Resource of Buildings of the Historical Construction of the Resort Region of the Caucasian Mineral Waters

Cited by 2 publications

References 2 publications

Influence of the foundation bed stiffness on the dynamic properties of the building as of a multi-mass cantilever bar

Influence of the foundation bed stiffness on the dynamic properties of the building as of a multi-mass cantilever bar

Assessment of Stability of Mining Departments Under Impact Loads

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