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Uklon vitkih okroglih dvocevnih sovprežnih stebrov z betonskim jedrom ob upoštevanju zdrsov med sloji = Buckling capacity of slender concrete filled double skin steel tubular columns considering interface slipsČas, Bojan, 1975-V prispevku predstavimo nov matematični model za izračun kritične uklonske sile vitkih okroglih dvocevnih sovprežnih stebrov z betonskim jedrom in upoštevanjem zdrsa med jeklom in betonom. V ... angleškem govornem področju se tovrstne konstrukcije poimenujejo "concrete filled double-skin tubular columns" in se običajno označijo s kratico CFDST, ki jo uporabimo tudi v tem prispevku. Razviti računski model nam omogoča analizo vpliva različnih osnovnih parametrov na vrednost uklonske sile CFDST-stebrov. Izkaže se, da je uklonska sila tovrstnih stebrov neodvisna od vzdolžne togosti stika med jeklenim in betonskim delom sovprežnega prečnega prereza, medtem ko prečna togost stika podprerezov pomembno vpliva na vrednost kritične uklonske sile. Z naraščanjem vrednosti prečne togosti stika narašča tudi vrednost uklonske sile. Pokažemo tudi, da analitična vrednost kritične uklonske sile razvitega računskega modela dobro sovpada z rezultati eksperimentalnih in numeričnih raziskav drugih raziskovalcev, če v računskih postopkih uporabimo kalibrirane vrednosti prečne togosti stika med jeklenima cevema in betonskim jedrom CFDST-stebrov. S parametričnimi študijami pokažemo tudi, da prečna togost stika, kot je bila dosežena v primerih realnih, testom podvrženih CFDST-stebrov, zavzema številčno relativno nizke vrednosti.Source: Gradbeni vestnik : glasilo Zveze društev gradbenih inženirjev in tehnikov Slovenije. - ISSN 0017-2774 (Letn. 70, apr. 2021, str. 62-69)Type of material - article, component part ; adult, seriousPublish date - 2021Language - slovenianCOBISS.SI-ID - 61534467
Author
Čas, Bojan, 1975-
Topics
uklon |
kompoziti jekla in betona |
zdrs |
stebri |
buckling |
CFDST |
slip |
column
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source: Gradbeni vestnik : glasilo Zveze društev gradbenih inženirjev in tehnikov Slovenije. - ISSN 0017-2774 (Letn. 70, apr. 2021, str. 62-69)
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Čas, Bojan, 1975- | 20157 |
Source: Personal bibliographies
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