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The economic feasibility of taking into account the joint work of load-bearing and enclosing elements in large-span wooden spatial structures
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 6, Pp 664-678 (2021) (2021)
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| 2 |
Experimental study of elastic-plastic deformation of a cylindrical shell made of steel 45
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 5, Pp 519-527 (2021) (2021)
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Structural analysis of high-rise building using ETABS and RSA software
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 2, Pp 133-139 (2021) (2021)
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The influence of mounted assembly process on the stress-strain state of the lattice dome frame
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 5, Pp 443-454 (2021) (2021)
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| 5 |
Determination of natural vibration frequencies of reinforced cylindrical shell
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 6, Pp 628-638 (2021) (2021)
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| 6 |
Geometry of the normal ruled surfaces
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 6, Pp 562-575 (2021) (2021)
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| 7 |
Stress state analysis of an equal slope shell under uniformly distributed tangential load by different methods
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 1, Pp 51-62 (2021) (2021)
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| 8 |
Viktor A. Bazhenov (1941-2021)
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 3, Pp 308-309 (2021) (2021)
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| 9 |
Evaluation of seismic forces under modified structural schemes in the process of vibrations
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 4, Pp 391-403 (2021) (2021)
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| 10 |
Seismic stability of vibration-insulated turbine foundations depending on the frequency composition of seismic impact
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 1, Pp 30-41 (2021) (2021)
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| 11 |
Theoretical foundations for calculating bridges for endurance using the kinetic theory of durability of structural materials
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 3, Pp 219-227 (2021) (2021)
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| 12 |
Innovation structures of very lean roller compacted concrete dams
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 3, Pp 248-260 (2021) (2021)
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| 13 |
Pavel M. Salamakhin (1930-2021)
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 3 (2021) (2021)
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| 14 |
Inverted pyramid Azores - an eternal hybrid structure
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 3, Pp 261-269 (2021) (2021)
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| 15 |
A new direction for calculating the strength of bent reinforced concrete elements along inclined sections with an example of calculating an experimental beam
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 5, Pp 479-499 (2021) (2021)
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| 16 |
Numerical analysis of cylindrical shell stability interacting with inhomogeneous soil
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 6, Pp 608-616 (2021) (2021)
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| 17 |
Optimization of channels and I-shaped bended closed profiles with tubular shelves from sheets of different thicknesses
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 2, Pp 140-164 (2021) (2021)
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Abstract:
The continuation of optimization of channels and I-beams bent closed profiles (BCP) with tubular flanges made of rolled sheet of different thicknesses is presented. Such profiles are intended for light steel thin-walled structures (LSWS), which are distinguished by high technical and economic indicators and massive demand in industrial and civil construction, which confirms the relevance of their further development. The main results of the calculation of the optimal bending arrangement of composite sections of I-beams from sheet blanks of different thicknesses, including channel-type BCPs unified in terms of optimal parameters, are also presented. The aim of the study is to show that the characteristics of the LSWS can be further improved by shaping profiles, combining straight and round outlines of closed and open contours in a composite section. Methods. By means of experimental design studies, solution of optimization problems and variant design of I-profiles, their composite sections from sheet blanks of different thicknesses, including blanks of channel profiles, have been refined. The originality of channels and I-shaped BCP has been confirmed by patent examination. Results. The I-shaped BCP consists of two tubular shelves and one double thickness wall. Calculation of the optimal layout of an I-shaped BCP made of rolled sheet of different thicknesses for bending showed that the bearing capacity is limited by the ratio of the thickness of the flanges and the wall of its composite section. In particular, when the thickness of the flanges is 2 times the wall thickness, the strength is maximum at a ratio of width to height of 1/11, and when the thickness of the flanges is 0.6 times the wall thickness, the strength is maximum at a ratio of 1/3.3. With the ratios of the width and height of I-shaped BCP of 1/2.68.1/3 and channel-type BCPs of 1/5.36.1/6, their composite sections should be optimally assembled from standardized blanks.
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Keyword:
Architectural engineering. Structural engineering of buildings; bar structures; bent-closed profiles; calculation of optimal parameters; gear fastenings; optimization of sections; TH845-895; thin-walled structures
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URL: https://doi.org/10.22363/1815-5235-2021-17-2-140-164
https://doaj.org/article/b07763d0451a4f108146bfe31b0c19fa
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| 18 |
Modeling and visualizing of the formation of a snub dodecahedron in the AutoCAD system
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 1, Pp 42-50 (2021) (2021)
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| 19 |
Mathematical modeling of bending stress waves in an aboveground oil pipeline under unsteady seismic action
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 6, Pp 639-650 (2021) (2021)
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| 20 |
Stress-strain state of reinforced concrete structures of the LN-1 and LN-2 retaining walls of Zagorskaya PSPP taking into account the opening of interblock joints and the formation of secondary cracks
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In: Structural Mechanics of Engineering Constructions and Buildings, Vol 17, Iss 4, Pp 324-334 (2021) (2021)
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