Stability analysis of steel compression members under shock loads
This paper presents the results of a numerical analysis of the elastic-plastic behaviour of steel compression members subjected to compression with a permanent pre-deformation in the longitudinal axis by a longitudinal indispensable shock load. A differential load intensity was considered up to the ...
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Wojskowa Akademia Techniczna, Redakcja Wydawnictw WAT, ul. gen. S. Kaliskiego 2, 00-908 Warszawa
2018-04-01
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doaj-b3d92694f12a47dd9615662340153f752020-11-25T00:37:55ZengWojskowa Akademia Techniczna, Redakcja Wydawnictw WAT, ul. gen. S. Kaliskiego 2, 00-908 Warszawa Biuletyn Wojskowej Akademii Technicznej 1234-58652018-04-0167110712510.5604/01.3001.0011.805101.3001.0011.8051Stability analysis of steel compression members under shock loadsAneta Brzuzy0Grzegorz Bąk1Military University of Technology, Faculty of Civil Engineering and Geodesy, 2 Gen. W. Urbanowicza Str., 00-908 Warsaw, PolandMilitary University of Technology, Faculty of Civil Engineering and Geodesy, 2 Gen. W. Urbanowicza Str., 00-908 Warsaw, PolandThis paper presents the results of a numerical analysis of the elastic-plastic behaviour of steel compression members subjected to compression with a permanent pre-deformation in the longitudinal axis by a longitudinal indispensable shock load. A differential load intensity was considered up to the loss of stability. A finite difference method was applied, with an explicit integration schema for the time of the dynamic stability equations. It was assumed that the precursor to the unstable behaviour of a steel compression member was a continuous deformation of the rod axis, which was defined according to current industry-standard design procedures. Cases of flexible and stiff rods, varying in slenderness, were considered. It was demonstrated that a significant load on the performance of the steel compression members and their buckling mechanisms is attributable to longitudinal wave effects. These longitudinal wave effects cause high-frequency changes in the axial forces with a significant stress concentration due to the effect of reflection from a pinned support. This is critical for the dissipation of internal energy by plastic deformation. The applied research method facilitated an estimation of the dynamic critical forces and their relationships with static values. Keywords: steel rods with pre-deformation of axis, elastic-plastic behaviour, dynamic stability of rods, differential approximation, effects of axial wave response http://biuletynwat.pl/gicid/01.3001.0011.8051steel rods with pre-deformation of axiselastic-plastic behaviourdynamic stability of rodsdifferential approximationeffects of axial wave response |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Aneta Brzuzy Grzegorz Bąk |
spellingShingle |
Aneta Brzuzy Grzegorz Bąk Stability analysis of steel compression members under shock loads Biuletyn Wojskowej Akademii Technicznej steel rods with pre-deformation of axis elastic-plastic behaviour dynamic stability of rods differential approximation effects of axial wave response |
author_facet |
Aneta Brzuzy Grzegorz Bąk |
author_sort |
Aneta Brzuzy |
title |
Stability analysis of steel compression members under shock loads |
title_short |
Stability analysis of steel compression members under shock loads |
title_full |
Stability analysis of steel compression members under shock loads |
title_fullStr |
Stability analysis of steel compression members under shock loads |
title_full_unstemmed |
Stability analysis of steel compression members under shock loads |
title_sort |
stability analysis of steel compression members under shock loads |
publisher |
Wojskowa Akademia Techniczna, Redakcja Wydawnictw WAT, ul. gen. S. Kaliskiego 2, 00-908 Warszawa |
series |
Biuletyn Wojskowej Akademii Technicznej |
issn |
1234-5865 |
publishDate |
2018-04-01 |
description |
This paper presents the results of a numerical analysis of the elastic-plastic behaviour of steel compression members subjected to compression with a permanent pre-deformation in the longitudinal axis by a longitudinal indispensable shock load. A differential load intensity was considered up to the loss of stability. A finite difference method was applied, with an explicit integration schema for the time of the dynamic stability equations. It was assumed that the precursor to the unstable behaviour of a steel compression member was a continuous deformation of the rod axis, which was defined according to current industry-standard design procedures. Cases of flexible and stiff rods, varying in slenderness, were considered. It was demonstrated that a significant load on the performance of the steel compression members and their buckling mechanisms is attributable to longitudinal wave effects. These longitudinal wave effects cause high-frequency changes in the axial forces with a significant stress concentration due to the effect of reflection from a pinned support. This is critical for the dissipation of internal energy by plastic deformation. The applied research method facilitated an estimation of the dynamic critical forces and their relationships with static values.
Keywords: steel rods with pre-deformation of axis, elastic-plastic behaviour, dynamic stability of rods, differential approximation, effects of axial wave response
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topic |
steel rods with pre-deformation of axis elastic-plastic behaviour dynamic stability of rods differential approximation effects of axial wave response |
url |
http://biuletynwat.pl/gicid/01.3001.0011.8051 |
work_keys_str_mv |
AT anetabrzuzy stabilityanalysisofsteelcompressionmembersundershockloads AT grzegorzbak stabilityanalysisofsteelcompressionmembersundershockloads |
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1725298934901899264 |