EXPERIMENTAL STUDY OF ADDITIONAL RETROFIT METHOD USING FRP ON HIGH STRENGTH AND LOW STRENGTH REINFORCED CONCRETE BEAM AND SLAB

• Main Author: Emanuel, Nicholas
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74004
• Institution: Institut Teknologi Bandung

During its service time, structure may exhibit a range of deficiencies due to deterioration, construction/design error, changes in functionality, and design standard upgrade, and etc. Therefore, deficient structure need to be retrofitted to function well. Structure that is retrofitted once, during its service time may need further strengthening. Therefore, this research will evaluate and analyze even further regarding the behavior of retrofitted structural element. On this research, 3 beams and 2 slabs that has been retrofitted with FRP flexural reinforcement 5 years ago, will be retrofitted even further. Beams will be reinforced with FRP shear reinforcement and slabs will be reinforced with another layer of FRP flexural reinforcement. Two kind of concrete that will be evaluated in this research, including high strength concrete and low strength concrete. Low strength concrete will be marked as BL, high strength concrete will be marked as BH, high strength slab will be marked as SH, and low strength slab will be marked as SL. The main objective of this research is to evaluate the behavior of retrofitted beams and slabs by observing the ductility, stiffness, ultimate load, mode of failure, and moment capacity of both beam and slab. Based on experimental results, it was obtained that low strength beam still experience shear compression failure and high strength beam still experience flexural failure with higher ultimate load. Specifically on high strength beam, the ductility increase significantly with the addition of FRP shear reinforcement. Meanwhile, either low strength slab and high strength slab experience shear failure due to over-reinforced condition with higher stiffness due to additional layer of flexural FRP reinforcement. On top of that, it was observed that ACI 440.2R-17 could be used to predict the moment capacity of high strength beam with ±5% error.