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Obnašanje tlačno obremenjenih enojno simetričnih jeklenih profilov : magistrsko delo
Hlastec, Jan (Author), Sinur, Franc (Mentor) More about this mentor... This link opens in a new window, Može, Primož (Co-mentor)

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Abstract
V magistrskem delu so obravnavani tlačno obremenjeni enojno simetrični jekleni profili. Podrobneje so analizirani centrično in ekscentrično tlačno obremenjeni vroče valjani jekleni elementi s prečnim prerezom kotnika. Predstavljeni so postopki določitve uklonske nosilnosti za elemente s kompaktnim in vitkim prečnim prerezom po evropskih Evrokod in ameriških AISC standardih. Predstavljeni postopki so uporabljeni pri izračunu uklonske nosilnosti izbranega elementa z vitkim prečnim prerezom. Vpliv zaostalih napetosti in geometrijskih nepopolnosti, ki so posledica načina izdelave jeklenih elementov, je v standardih upoštevan v uklonskih krivuljah. V numeričnih simulacijah obnašanja tlačno obremenjenih kotnih profilov v programskem okolju Abaqus, so bile omenjene materialne in geometrijske nepopolnosti združene v ekvivalentne geometrijske nepopolnosti z ustrezno amplitudo. Rezultati numeričnih simulacij centrično obremenjenih kotnikov s kompaktnim prečnim prerezom se ujemajo z ustrezno uklonsko krivuljo. Pri ekscentrično obremenjenih elementih je ustreznost numeričnega modela preverjena s primerjavo rezultatov uklonske nosilnosti z rezultati tujih raziskovalcev. Rezultati numeričnih simulacij centrično in ekscentrično obremenjenih elementov so nadalje primerjani z rezultati standardov. Podani so predlogi za natančnejši izračun uklonske nosilnosti enojno simetričnih jeklenih profilov in poenotenje različnih delov standardov.

Language:Slovenian
Keywords:gradbeništvo, magistrska dela, uklonska nosilnost jeklenih elementov, enojno simetrični jekleni profili, enakokraki kotni profili, torzijski, torzijsko-upogibni in upogibni uklon, SIST EN 1993, SIST EN 1999
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2015
Publisher:[J. Hlastec]
Number of pages:XVI, 96 str., [16] str. pril.
Place:Ljubljana
COBISS.SI-ID:7293537 Link is opened in a new window
Views:769
Downloads:432
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Secondary language

Language:English
Title:Behaviour of singly symmetric steel profiles subjected to compressive force
Abstract:
This Master Thesis deals with singly symmetric steel profiles subjected to compressive force. Detaily are analysed centrically and eccentrically loaded hot rolled steel elements with equal leg cross-section. The procedures for determining the buckling load for elements with a compact and slender crosssection according the European Eurocodes and American AISC standards are presented. Featured procedures are used in the calculations of buckling capacity for selected element with a slender crosssection. Influence of residual stresses and geometrical imperfections resulting from the method of manufacture of steel elements, is incorporated in buckling curves. Numerical analysis of buckling behaviour were calculated in numerical environment Abaqus. In numerical simulations material and geometric imperfections were combined in an equivalent geometric imperfection with the corresponding amplitude, so that the results of numerical simulations for centrically loaded elements with a compact cross-section coincide with the corresponding buckling curve in Eurocode standard. Adequacy of the numerical model eccentrically loaded elements was validated by comparing the results of the buckling load by the results of other researchers. The results of numerical simulations centrically and eccentrically loaded elements are further compared with the results calculated according the standards. Proposals for less complicated and more accurate calculations are given for standards.

Keywords:civil engineering, master of science thesis, buckling design of steel elements, singly symmetric steel profiles, equal leg angles, torsional, torsional-flexural and flexural buckling, SIST EN 1993, SIST EN 1999

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