Rehabilitation of Continuous Reinforced Concrete Beams in Shear by External Bonding of Carbon Fiber Reinforced Polymer Strips for Sustainable Construction
| Autor: | J. Jayaprakash, Abdul Aziz Abdul Samad, Noridah Mohamad, Noorwirdawati Ali, Priyan Mendis |
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| Rok vydání: | 2016 |
| Předmět: |
Carbon fiber reinforced polymer
Materials science business.industry Mechanical Engineering Stiffness STRIPS Structural engineering Reinforced concrete law.invention Sustainable construction Shear (geology) Mechanics of Materials Deflection (engineering) law medicine General Materials Science Composite material medicine.symptom business Beam (structure) |
| Zdroj: | Key Engineering Materials. 708:49-58 |
| ISSN: | 1662-9795 |
| Popis: | To achieve sustainability in construction, the rehabilitation of existing concrete structures is vital in ensuring its structural integrity and longevity. Therefore, an experimental investigation on the shear strengthening of 2-span continuous reinforced concrete (RC) beams wrapped with carbon fiber reinforced polymer (CFRP) strips were conducted. The beam specimens were subjected to four point bending test and loaded incrementally until failure occurs. Different wrapping schemes and layers of CFRP strips were externally bonded within the shear span of the beams. The failure load, modes of failure, its crack patterns, deflection profile were recorded and presented for discussion. From observation, the experimental results indicated good improvement as the shear strengthened beams shows enhanced failure load and shear strength capacity. An improved stiffness and ductility behaviour was also observed compared to the control beam. Comparison with ACI 440 (2008) design provisions for shear strength shows that the prediction values underestimated its experimental results. This indicates that the enhanced shear performances of the 2-span continuous RC beams prove the reliability of CFRP as a strengthening material. Hence, the shear strengthening technique allows the rehabilitation process of existing structural members to improve its structural integrity, longevity and sustainability. |
| Databáze: | OpenAIRE |
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