The Influence of the Corrosion Induced Damage on the Pull-Out Capacity of Reinforcement : Natural vs. Accelerated Corrosion : Master's Thesis

Tema diplomskog rada bila je istražiti utjecaj oštećenja izazvanih od prirodne ili ubrzane korozije na kapacitet pokusa izvlačenja armature iz uzorka. Armiranobetonska greda se prvo izlaže utjecaju korozije te je nakon toga na njoj izvršen pull-out test. U radu je korišten nedavno razvijeni trodimenzionalni kemo-higro-termo-mehanički model za beton. Model uzima u obzir interakciju između nemehaničkih procesa i mehaničkih svojstava betona. Napravljeno je više modela armiranobetonske grede te su prikazani proračuni i rezultati za različito vremensko trajanje korozije. U radu su prikazane usporedbe prirodne i ubrzane korozije s naglaskom na oštećenja armiranobetonske grede i pad kapaciteta pull-out testa.The assignment of this master thesis was to investigate the influence of the corrosion induced damage on the pull-out capacity of reinforcement. Reinforced concrete beam has been exposed to corrosion and after that to pull-out test. In the present paper, a recently developed coupled three-dimensional chemo-hygro-thermo-mechanical model for concrete is discussed. The model takes into account interaction between non-mechanical processes and mechanical properties of concrete. A certain number of different models of reinforced concrete beams were made. Calculations and results for different corrosion durations are presented and compared for natural and accelerated corrosion with emphasis on damage of reinforced concrete beam and degradation of pull-out capacity