Oganesyan O.V.

Volgograd State Technical University, Russia

Technological Solutions Ensuring Reliable Operation of Steel Vertical Reservoirs in Seismic Areas

https://doi.org/10.58224/2618-7183-2022-5-5-5-16
Abstract
The article discusses the relevance of reliable operation of vertical steel reservoirs (RVS) in earthquake-prone areas. Based on the analysis of a number of scientific publications, it has been estab-lished that for the safe functioning of large–sized RVS, it is necessary to install anchor devices, the main purpose of which is the transmission of vertical forces arising from an earthquake in the wall to the base. To do this, they must be securely fixed to the wall and the base in order to evenly distribute efforts across the office of the RVS. In some cases, poor-quality connection of the anchor with the RVS leads to significant stresses in the anchors and there is a possibility of both rupture of the housing itself and rupture of the connection of the housing with the bottom of the tank. It is known that large-sized tanks require a massive base and the installation of anchors with a large number of bolts is a very expensive undertaking.
The article discusses the most common variants of anchors that are used in practice, lists some of their disadvantages and suggests an improved version based on the analysis of scientific publications. The authors present their own development – a modified version of the anchor device, the corresponding design solutions are given and the technology of the device is described. In addition, it was noted the need to increase the bearing capacity of the soils of the RVS foundation, constructed in earthquake-prone areas using geocomposite materials. It is emphasized that the required number and length of an-chor devices, as well as the choice of geocomposite material for soil hardening should be justified by appropriate calculations. It is concluded that in order to ensure reliable operational characteristics of RVS located in seismically hazardous areas, the installation of anchors, despite attracting additional financial resources, is a prerequisite, since in the event of a spill of petroleum products, the restoration of biogeocenosis requires more than one decade and involves enormous material costs.
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EXTERNALTRANSLUCENT COATINGS DEVICE WITH THE USE OF GLASSPROFITE AND COMPOSITE MATERIALS

https://doi.org/10.34031/2618-7183-2019-2-4-50-55
Abstract
The article raises issues related to the use of profile glass (glass profilite) in the device of external vertical enclosing structures of modern building systems. There is a need for a combination of composite materials, especially foam composite, in the manufacture of translucent enclosing structures, which greatly reduces the weight of the outer panels and increases their heat and sound insulation characteristics. It is emphasized the need to consider the issues of energy efficiency not only at the stage of operation of the building, but also at the stage of its construction, as energy efficiency is not only the ability to save heat at the stage of operation of buildings, but also high technological performance of works at the stage of their construction.
The novelty of this study is just the design of the wall panel with a possible combination of two materials – profiled glass and foam. The article describes in detail not only the design of the panel itself, but the technology of its manufacture, as well as the technological processes associated with the device of enclosing structures. Two variants of connection of wall panels with floor slabs are considered and connection nodes are given. Based on the analysis of a number of scientific publications, the variants of the mechanisms used for the installation of panels taking into account the nodes of the connection of structural elements – the panel itself and the floor slabs are considered. Due to the fact that the article discusses the use of boxed glass, emphasizes the need to continue the study in order to identify the possibility of using other types of glass (channel, ribbed, edged) for the manufacture of multi-component wall panels, taking into account the climatic conditions of the regions.
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THE USE OF COMPOSITE MATERIALS IN RECONSTRUCTION OF FLOORS OF INDUSTRIAL BUILDINGS

https://doi.org/10.34031/2618-7183-2019-2-3-58-64
Abstract
The article discusses the relevance of the use of composite materials in the reconstruction of exposed to heavy loads of concrete and reinforced concrete floors of industrial buildings. It is noted that at the present stage of development of the construction industry special attention is paid to the use of steel fibreconcrete, as this material allows with minimal material and labor costs to carry out work on the reconstruction of industrial floors. The novelty of this study is the use as an adhesive between the existing floor, which is to be restored and strengthened, and the newly laid steel-fiber concrete layer of polymer-bitumen composite material with the addition of cement and graphite powder, previously obtained by the authors experimentally. This material with the required thickness is also a structural layer for leveling the surface of the lower layer, reducing friction under the sole of the upper steel-fiber concrete layer and the existing floor. The paper presents the technology of work in the reconstruction. The composition of the steel-fiber concrete layer is adopted on the basis of studies by other authors. Despite the fact that the experiments proved the solidity and strength of the reconstruction of the floor by the developed technology, the article notes that the final characteristics of the proposed floor design and technology can be identified only during operation, which can be the basis for further research on optimizing the thickness of the layers proposed for use of composite materials. For the evaluation of economic efficiency of application of these composite materials in the reconstruction of the concrete floors in the course of the experiment, there are revealed some figures for labor and material costs.
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