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Evaluation of the Performance and Ductility Index of Concrete Structures Using Advanced Composite Material
1Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Gyeonggi-do, Korea.
Polymers
|December 10, 2021
Summary
This study evaluated the ductility of reinforced concrete (RC) and prestressed concrete (PSC) structures strengthened with fiber-reinforced polymers (FRPs) and PS strands. Most RC structures showed ductile behavior, while most PSC structures exhibited brittle behavior.
Area of Science:
- Civil Engineering
- Materials Science
Background:
- Concrete structures degrade over time, necessitating performance enhancement.
- Fiber-reinforced polymers (FRPs) and prestressed (PS) strands are key materials for strengthening concrete structures.
Purpose of the Study:
- To evaluate the ductility index of reinforced concrete (RC) and prestressed concrete (PSC) structures strengthened with FRP and PS strand materials.
- To compare the ductility of RC and PSC structures using various strengthening techniques.
Main Methods:
- Conducted structural tests using FRP and PS strand materials.
- Evaluated the ductility index based on load-displacement data from structural tests.
- Analyzed ductility changes using structural deflection and energy area ratio.
Main Results:
- Reinforced concrete (RC) structures, excluding those strengthened by company H, demonstrated ductile or semi-ductile behavior.
- Prestressed concrete (PSC) structures, except for control and PH4NP specimens, exhibited brittle behavior.
- Ductility evaluation was performed at crack, yield, and ultimate points.
Conclusions:
- The choice of strengthening material and method significantly impacts the ductility of concrete structures.
- FRP strengthening generally enhances ductility in RC structures, while PSC structures may require specific approaches to avoid brittleness.
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