Comparative analysis of the overall stability of steel bar elements according to ukrainian standards
Keywords:
overall stability, steel bar element, DBN V.1.2-14:2018, DSTU-N B EN 1993-1-1:2010, SNiP II-23-81*Abstract
This publication presents the results of a comparative analysis of the overall stability of steel bar elements. The analysis was performed based on calculation methods according to Ukrainian standards. Three main methods were considered: the classical method, reflected in the now-repealed standard SNiP II-23-81*, the domestic method, reflected in the current standard DBN V.1.2-14:2018, and the European method reflected in the implemented standard DSTU-N B EN 1993-1-1:2010. The selection of cross-sections of elements based on these methods involved the use of current product range in the design of steel structures. Five types of open and closed cross-sections were analysed, which are the most common in modern engineering design practice: round hot-rolled seamless pipe, cold-formed closed rectangular profile, hot-rolled I-beam, hot-rolled T-beam and hot-rolled equal-leg angles. In order to obtain extensive statistical material for further analysis, core elements with lengths of 1.5 m, 3 m and 4.5 m were considered. Calculations were performed for steels with strength levels of 200 MPa, 240 MPa and 280 MPa. In all calculation cases, loads ranging from 100 kN to 1900 kN were applied in increments of 200 kN.
The comparative analysis of the obtained results showed that the minimum cross-sectional area required to ensure overall stability is calculated using the domestic methodology reflected in the current standard DBN V.1.2-14:2018. Higher cross-sectional area values were obtained in accordance with the European method reflected in the implemented standard DSTU-N B EN 1993-1-1:2010. The highest values correspond to the classic methodology reflected in the now-repealed standard SNiP II-23-81*. Moreover, this trend remains for all considered steel strength levels, element lengths and types of cross-sections considered.
In quantitative terms, the mass indicators obtained for central compression bars in normalized form in relation to standard DBN V.1.2-14:2018 reach values of 1.53 for standard DSTU-N B EN 1993-1 -1:2010 and 1.83 for the standard SNiP ІІ-23-81*.
References
DBN V.1.2-14:2018. System for ensuring the reliability and safety of construction objects. General principles for ensuring the reliability and structural safety of buildings and structures. With amendment No. 1. Valid from 2022-09-01. Kyiv: Minregionstroy, 2018. 36 p.
Bannikov D. O. Analysis of the causes of accidents of steel capacitive structures for bulk materials. Metallurgical and Mining Industry. 2011. Vol. 3, No. 5. P. 243-249.
Kocherga L. G. Research on the stability of rod elements of flat steel trusses: diploma thesis for the master's degree: speciality Industrial and civil engineering / scientific supervisor D. O. Bannikov; Dnipro National University of Railway Transport. Dnipropetrovsk, 2013. 96 p.
Raksha S. V. Connected loss of stability and weight optimization of thin-walled rods of open profile: author's abstract of the dissertation ... Doctor of Technical Sciences: 05.23.17. Dnipropetrovsk, 2003. 42 p.
Yurchenko V. V. Improving the structural form of lightweight building frames from cold-bent profiles based on solving the optimal design problem: author's abstract of the dissertation ... Doctor of Technical Sciences: 05.23.01. Kyiv, 2019. 44 p.
Perelmuter A. V., Yurchenko V. V. Research into the area of bearing capacity of thin-walled rod elements from cold-bent profiles. Science and Construction. 2019. Issue 3 (21). P. 42-48. DOI: https://doi.org/10.33644/scienceandconstruction.v21i3.110
Yurchenko V. V., Perelmuter A. V. Bearing capacity of rod elements of structures made of cold-bent profiles. Kyiv: Karavela, 2020. 310 p.
Yurchenko V. V. Searching for optimum cross-sectional sizes of cold-formed C-profiles subjected to central compression. Bulletin of the Odessa State Academy of Civil Engineering and Architecture. 2019. Issue 77. P. 115-125. DOI: 10.31650/2415-377X-2019-77-115-125
Okhtets I. O. Stability of thin-walled rods of an open profile with shape imperfections: author's abstract. dissertation ...candidate of technical sciences: 05.23.17. Kyiv, 2023. 25 p.
Okhten I.O., Gotsulyak E.O., Luk’yanchenko O.O. Research on the stability of thin-walled elements of an open profile taking into account initial imperfections. Strength of materials and theory of structures. 2008. Issue 82. P. 131-136.
Bilyk S. I. Rational steel frames of low-energy buildings from I-beams of variable cross-section: dissertation of Doctor of Technical Sciences: 05.23.01. Kyiv, 2008. 460 p.
Bilyk S.I., Bilyk A.S. Stability coefficient of centrally compressed steel elements taking into account initial deformations and geometric imperfections. Construction, materials science, mechanical engineering. 2015. Issue 82. P. 32-37.
Pashinsky V. A., Pashinsky M. V., Skrynnik I. O., Darienko V. V. Weight characteristics and areas of rational use of steel centrally compressed columns. Modern technologies and calculation methods in construction. 2019. Issue 12. P. 146-154. DOI: https://doi.org/10.36910/6775-2410-6208-2019-2(12)-18
Bilyk S. I., Bilyk A. S., Tsyupin E. I. Stability of elastic rods with initial imperfections of steel trusses with rigid nodes. Resistance of materials and theory of structures. 2022. Issue 109. P. 213-228. DOI: https://doi.org/10.32347/2410-2547.2022.109.213-228
Marchenko T.V., Bannikov D.O. Comparative analysis of forms of loss of stability of thin-walled rod elements. Metal structures. 2009. Vol. 15, No. 3. P. 177-188.
Marchenko T.V., Bannikov D.O. Experimental studies of forms of loss of stability of thin-walled elements. Construction, materials science, mechanical engineering, series: Innovative technologies of the life cycle of objects of residential, civil, industrial and transport purposes. 2009. Vol. 50. P. 368-372.
DBN V.2.6-198:2014. Steel structures. Design standards. With amendment No. 1. Valid from 2015-01-01. Kyiv: Minregionalstroy of Ukraine, 2014. 220 p.
EN 1993-1-1:2005. Eurocode 3: Design of steel structures. Part 1-1: General rules and rules for buildings. Valid from 2009-12-10. CEN/TS 250, 2005. 85 p.
DSTU-N B EN 1993-1-1:2010. Eurocode 3. Design of steel structures. Part 1-1. General rules and rules for buildings (EN 1993-1-1:2005, IDT). Valid from 2013-07-01. Kyiv: Minregionalstroy, Construction and Housing of Ukraine, 2013. 205 p.
Hezentsvei Y. I., Bannikov D. O. Use of fine-grained heat-strengthened steels to increase the operational qualities of bunker capacities from thin-walled galvanized profiles. Science and progress of transport. 2021. Issue 1 (91). C. 84-93. DOI: https://doi.org/10.15802/stp2021/227198
