Stress-strain state of a triangular truss with uncut chords of a five-sided composite profile
https://doi.org/10.22227/2305-5502.2023.1.4
Abstract
Introduction. The author considers designs of triangular trusses that can be used to design roofs of industrial and public buildings, various combined systems, and also as overpass structures of linear facilities. The design of a spatial truss as part of a patent pending development of a triangular truss cover with non-cutting closed-section chords is presented. The purpose of numerical studies is to estimate the stress-strain state (SSS) of a spanning triangular truss subjected to static nodal load and different arrangement of strut elements as well as to create a verification database for further numerical studies of non-faceted interface nodes.
Materials and methods. The numerical research methodology takes into account the application of nodal static loads, modelling the placement of the enclosing structure of the pavement using purlins. The use of the unit load method is aimed at determining the response of the load-bearing system as part of a comparative evaluation and comparison with the data obtained from other research tasks.
Results. In the course of numerical studies, data were obtained, characterising the deflected mode of the triangular truss model in terms of force distribution in the rods and vertical displacements of the nodes.
Conclusions. Analysis of the obtained results shows that the accepted design model of a triangular truss adequately reflects its deflected mode. Practical application of the numerical research technique on the basis of application of unit nodal loads consists in the possibility of using calculation results in the form of a structured data set required in calculations by the limit states method. The results obtained can be used as a basis for verification of data obtained in further numerical studies of non-faceted node constructions within the framework of the lamellar mathematical model. The presented numerical studies are part of the complex of scientific research into the actual performance of spanning triangular trusses.
About the Author
Evgeniy A. Melyokhin
Moscow State University of Civil Engineering (National Research University) (MGSU)
Russian Federation
Russian Federation
Candidate of Technical Sciences, Associated Professor, Associated Professor of the Department of Architectural and building design and environmental physics
- ID RSCI: 381648
- ResearcherID: AFK-2034-2022
References
1. Biryulev V.V., Chernov I.N. Steel girders with box sections of rods welded from angles. Izvestiya vuzov. Construction and architecture. 1974; 4:8-14. (rus.).
2. Klyachin A.Z. Metal lattice spatial structures of a regular structure (development, research, application experience). Ekaterinburg, Diamant Publ., 1994; 276. (rus.).
3. Trushchev A.G. Spatial metal structures. Moscow, Stroyizdat Publ., 1983; 215. (rus.).
4. Melekhin E.A. Modular trihedral trusses of flat roofs. Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel’nogo universiteta. Journal of Construction and Architecture. 2021; 23(2):65-78. DOI: 10.31675/1607-1859-2021-23-2-65-78 (rus.).
5. Patent RU No. 2188287 C2 IPC E04C 3/04. Covering from trihedral trusses / M.M. Kopytov, K.A. Erokhin, A.V. Matveev, E.A. Melekhin; dec. No. 2000117116/03 dated June 27, 2000; publ. August 27, 2002. Bull. No. 24; 6.
6. Patent RU No. 36119 U1 MPK7 E04C 3/32. Thin-walled load-bearing structure of a closed five-sided section (its variants) / M.M. Kopytov, A.V. Matveev, A.P. Malinovsky, E.A. Melekhin ; dec. No. 2003118832/20 dated June 24, 2003; publ. February 27, 2004. Bull. No. 6; 6.
7. Kopytov M.M., Erokhin K.A., Matveev A.V., Melekhin E.A. Shapeless space-rod coatings with belts of pentagonal section profile. Mounting and Special Works in Construction. 2003; 11:2-6. (rus.).
8. Patent RU No. 19068 U1 MPK7 E04C 3/04. Structural coating / M.M. Kopytov, K.A. Erokhin, A.V. Matveev, E.A. Melekhin; Dec. No. 2001100914/20 dated January 9, 2001; publ. August 10, 2001. Bull. No. 22; 8.
9. Patent RU No. 2627794 C1 IPC E04C 3/08. Trihedral truss coating / E.A. Melekhin; dec. No. 2016124898 dated June 21, 2016; publ. August 11, 2017. Bull. No. 23. 8 p.
10. Patent No. 2661945 C1 IPC E04C 3/08. Trihedral truss coating / E.A. Melekhin, S.V. Firtsev; publ. 2017134238 from October 2, 2017; publ. July 23, 2018. Bull. No. 21.
11. Melekhin E.A. The work of knots of a formless folded coating with belts of a pentahedral composite profile: abstract of the thesis : dis. … cand. tech. Sciences. Tomsk, TGASU, 2003; 23. (rus.).
12. Erokhin K.A., Melekhin E.A. To the study of nodes of a formless spatial truss with a pentahedral section of the upper chord. Scientific and technical conference of KrasGASA. 2000; 25-27. (rus.).
13. Melekhin E.A. Lamellar calculation model of a node of a non-shaped spatial truss. Architecture and construction : 2nd International scientific and technical conference. 2002; 62-64. (rus.).
14. Melekhin E.A. Investigation of the influence of misalignment and compliance on the stress-strain state of the interface nodes of spatial-rod structures of coatings with belts of a five-sided composite profile made of rolled metal. Metal constructions: a look into the past and the future : VIII Ukrainian scientific and technical conference. 2004; 592-595. (rus.).
15. Gordeev V.N., Lantukh-Lyashchenko A.I., Pashinsky V.A., Perelmuter A.V., Pichugin S.F. Loads and impacts on buildings and structures / under the general ed. of A.V. Perelmuter. Moscow, ASV Publishing House, 2007; 482. (rus.).
16. Rickards R.B. Finite element method in the theory of shells and plates. Riga, Zinatne, 1988; 284. (rus.).
17. Perelmuter A.V., Slivker V.I. Calculation models of structures and the possibility of their analysis. Kyiv, Steel Publ., 2002; 600. (rus.).
18. Polyakov L.P., Fainburd V.M. Modeling of building structures. Kyiv, Budivelnik Publ., 1975; 159. (rus.).
19. Melekhin E.A., Ivanov P.S., Malygin A.B. Numerical studies of modular systems of trihedral trusses of flat roofs of buildings. Engineering Journal of Don. 2022; 6. (rus.).
20. Melekhin E.A., Goncharov N.V., Malygin A.B. Trihedral girders with prestressing for flat coatings. Engineering Journal of Don. 2022; 6. (rus.).
Review
For citations:
Melyokhin E.A. Stress-strain state of a triangular truss with uncut chords of a five-sided composite profile. Construction: Science and Education. 2023;13(1):60-71. (In Russ.) https://doi.org/10.22227/2305-5502.2023.1.4
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