EFFECT OF CORROSION ON LATERAL CYCLIC PERFORMANCE OF FIBER REINFORCED CONCRETE COLUMN

• Main Author: Juergen Winata, Berto
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/37060
• Institution: Institut Teknologi Bandung

For reinforced concrete (RC) structures exposed to marine environment, chloride attack is one of the main cause of corrosion. Corrosion can attack structural elements such as beams, slab, and columns at coastal buildings, for instance, port. Damage caused by corrosion on columns will reduce the structure’s seismic ability when earthquake occurs. Researchers have tried to find breakthroughs to mitigate corrosion’s damage on RC structures. One of the proposed ideas is to add polypropylene in concrete mix. This thesis will try to evaluate the cyclic performance of corroded RC column with polypropylene fiber addition. The focus of this research is to compare the performance of structural RC elements with and without fiber addition at various corrosion level. There were 2 stages of experiments in laboratory. First, tensile tests were conducted on RC cylindrical specimens with corroded reinforcement to evaluate the tension-stiffening effects. Second, cyclic tests were conducted on corroded RC columns to evaluate cyclic performance. Corrosion level used in this research were 0%, 5%, 10%, dan 30% for 1.00% polypropylene specimens, while fiber percentage used in concrete mix for tensile specimens were 0%, 025%, 0.50%, 0.75%, dan 1.00% of total volume. From the experiment results, it was concluded that fiber addition was not able to compensate the decrease of maximum load that could be borne by the corroded specimens. However, polypropylene addition were able to improve the specimens’s crack behavior. This was shown by the smaller cracks width and spacing compared to specimen without fiber addition at same corrosion level. RC columns with fiber addition were also able to dissipate larger energy up to 5% corrosion level, with the increase of energy dissipation around 24.67%. In addition, RC columns with polypropylene had better ductility compared to column without fiber addition.