Calculation of Elements Considering Geometric and Physical Nonlinearity Bylumped-deformations Method
Zulpuev Abdivap Momunovich,
Abdykeeva Shirin Suyunbayevna
Issue:
Volume 10, Issue 1, June 2022
Pages:
1-6
Received:
22 December 2021
Accepted:
15 January 2022
Published:
21 January 2022
DOI:
10.11648/j.net.20221001.11
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Abstract: This article describes the use of multi-storey buildings and structures, which are one of the new promising areas. The use of prefabricated reinforced concrete, in comparison with full monolithic, dramatically reduces the labor intensity of work at the construction site. The prefabricated monolithic structure during the construction of statically indeterminate systems makes it possible to quite simply ensure the spatial rigidity of the building or structure as a whole, as well as to reduce the construction time in comparison with a complete monolith by several times, reduce the labor intensity of the production of works by about 1,5÷2 times and accordingly, the value of the object decreases. Plane and bending stress states are experienced by many structures of high-rise construction. These are beams - walls, and bracing systems, in which horizontal loads are perceived mainly by diaphragms and stiffening cores. There are various methods for solving problems for a plane and bending stress state, for example, the finite difference method, the finite element method, the limit equilibrium method and the method of concentrated deformations. The relevance in this work lies in the need to create a methodology for calculating reinforced concrete structures in multi-storey buildings and structures, based on the method of concentrated deformations (MSD) with implementation on computer technology, taking into account the influence of the expansion effect and real diagrams of deformation of concrete and reinforcement, at different loading times. It also describes in detail the formation of a flat and bending model for the analysis of reinforced concrete structures by the method of concentrated deformations, with a complete diagram of the deformation of concrete and reinforcement, taking into account geometric and physical nonlinearity, including a descending branch depending on the initial data. In addition, a comparison of the obtained results of analytical, theoretical and experimental research data is given.
Abstract: This article describes the use of multi-storey buildings and structures, which are one of the new promising areas. The use of prefabricated reinforced concrete, in comparison with full monolithic, dramatically reduces the labor intensity of work at the construction site. The prefabricated monolithic structure during the construction of statically i...
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Hacking an Aircraft: Hacking the In-flight Entertainment System
Eman Ali Metwally,
Haytham Tarek Mohammed
Issue:
Volume 10, Issue 1, June 2022
Pages:
7-14
Received:
9 May 2022
Accepted:
30 May 2022
Published:
14 June 2022
DOI:
10.11648/j.net.20221001.12
Downloads:
Views:
Abstract: When it comes to systems that rely on computers and communications, we describe security as the prevention of intentional and, to a large extent, unintentional misuse that could compromise desired system behavior. In the context of existing safety, development, and certification, this study provides a practical understanding of how cyber security effects airplane computer system architecture. There's more to aviation than planes. It is backed up by the necessary ground infrastructure and equipment, as well as a large-scale computer network. Operations using computer networks to disrupt, deny, degrade, or destroy information housed in computers and computer networks, or the machines and networks themselves, are known as virtual attacks against the computer network. This paper discusses some of the most important security concerns that occur when it comes to aviation safety and reliability. We believe that many of the past accidents may have been perpetrated deliberately, and that some of them could be replicated maliciously now. We begin by looking at common security weaknesses and threats in aviation and its supporting infrastructure, as well as recalling some prior occurrences. Then we analyze what catastrophes are probable, if not inevitable, and what we might do in response.
Abstract: When it comes to systems that rely on computers and communications, we describe security as the prevention of intentional and, to a large extent, unintentional misuse that could compromise desired system behavior. In the context of existing safety, development, and certification, this study provides a practical understanding of how cyber security e...
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