1343 KB30 KB200020242014Ghods, AliMiri, MahmoudSohrabi, Mohammad Rezaštevilka:3letnik:48str. 395-402COBISSID:1057450ISSN:1580-2949URN:URN:NBN:SI:doc-Z5M8DIOSenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijebeamcorrosionforce - displacementkorozijamodelingmodeliranjesila - raztezeksteberEffect of rebar corrosion on the behavior of a reinforced concrete beam using modeling and experimental results| Vpliv korozije betonskega železa na armiranobetonski steber z uporabo modeliranja in eksperimentalnih rezultatov|Reinforcement corrosion in concrete may cause adverse effects, such as the area reduction of rebars, concrete cracking, a reduction of the bond strength and a change in the bond-slip behavior between concrete and rebars. All these effects will finally lead to the inappropriate performance of concrete structures. In this paper a corroded reinforced concrete beam, whose experimental results are available, is modeled based on the finite-element method using ANSYS. The results are then compared with the available and confirmed results. A reduction of the reinforcement area and a change in the bond strength between the concrete and the reinforcement are seen in the model. The effect of reinforcement corrosion on the force-displacement curve and the modeled beam are also studied and compared with the results from reinforced concrete made in the laboratory. It was observed that with an increase of the reinforcement corrosion rate, the load-carrying capacity of the concrete beam and the bond strength decreases. In addition, the area under the load-displacement curve of the concrete beam decreases with the increase of the reinforcement corrosionKorozija armature v betonu lahko vpliva škodljivo, tako kot zmanjšanje prereza betonskega železa, pokanje betona, zmanjšanje sile vezanja in sprememba vedenja vezave in drsenja med betonom in armaturo; vse to privede do neprimernih lastnosti betonske konstrukcije. V tem članku je bil modeliran z uporabo metode končnih elementov in ANSYS korodiran betonski steber s poznanimi eksperimentalnimi podatki. Rezultati so bili primerjani z razpoložljivimi in preverjenimi rezultati. Iz modela je razvidno zmanjšanje področja utrditve in sprememba v sili vezanja med betonom in armaturo. Preučevan je bil tudi vpliv korozije armature na krivuljo sila % raztezek in modeliran steber ter primerjan z laboratorijskimi rezultati pri armiranem betonu. Ugotovljeno je, da se z naraščanjem hitrosti korozije armature zmanjšujeta nosilnost betonskega stebra in sila vezanja. Področje pod krivuljo obremenitev % raztezek armiranega betonskega stebra se zmanjšuje z večanjem korozije armatureTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije