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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Linur R. Gimranov, Candidate of Technical Sciences, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Abdurahman Pazhwak, post-graduate student, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Title of the articleDetermination of the stress-strain state of a concrete block as part of a reinforced node truss from square hollow sections
Abstract.Problem statement. Today, trusses made of square hollow sections occupy the vast majority of the market among the load-bearing truss structures of the roof. Their advantages include cost-effectiveness and the absence of gussets. However, at the same time, verification calculations of such trusses require special attention to the nodes, and often the section of the element is determined based on the strength of the node, and not the truss element. Increasing the bearing capacity of the nodes of such farms will improve their economic efficiency.The paper deals with analytical and numerical studies to determine the stress-strain state of a concrete or fiber concrete block in a truss node made of square hollow sections. At the same time, a distinctive feature is that the nodes are strengthened locally. The relevance of the study lies in the fact that the method of calculating a fiber concrete block as part of a reinforced truss node will improve their technical and economic performance or solve the problem of heavily loaded nodes of such trusses. Purpose of the work: thedevelopment of analytical dependencies based on idealized design schemes of a fiber concrete block to determine its stress-strain state under a concentrated load, reflecting with a sufficient degree of reliability the stress-strain state of a block inside a loaded assembly of square hollow sections. To achieve this goal, the following tasks were formulated: to determine an independent design scheme of a fiber concrete block that most closely reflects its stress-strain state as part of the design model of the node, including braces and truss chords; to establish the applicability of the beam analogy to the design scheme of the block and propose a method for calculating the fiber concrete block, taking into account the beam analogy. Results. The main results of the work consist in the developed method for assessing the stress-strain state of a fiber concrete block as part of reinforced truss units from square hollow sections. Conclusions. The significance of the obtained results for the construction industry lies in the fact that the considered possible approaches to determining the stress-strain state of a fiber concrete block as part of a reinforced truss assembly made of square hollow sections make it possible to use this reinforcement method in practice, which will reduce the metal consumption and deformability of the considered trusses from square hollow sections.
Keywords.reinforcement nodes, square how sections, normal stress, fiber concrete block, load, bearing capacity, strength and rigidity
For citations:Gimranov L.R., Pazhvak A. Determination of the stress-strain state of a concrete block as part of a reinforced truss nodes from square how sections // News KSUAE 2022 №4 (62), p51-60, DOI: 10.52409/20731523_2022_4_51, EDN: LGZNAO


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