A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Shear strengthening of reinforced concrete beams using carbon-fibre-reinforced polymer laminates
To further understand the behavior of shear strengthening using externally bonded CFRP (carbon fiber reinforced polymer) laminates as the shear reinforcement, the following objective of this research have been established: To increase the test database of shear strengthening using externally bonded composites; To investigate the shear behavior and modes of failure of RC (reinforced conrete) beams with shear deficiencies after strengthening with CFRP laminates; To study the effect of various CFRP types and shear reinforcement configurations on the shear behavior of the beam; To propose design approaches that are based on experiments and analytical studies. Results of the test performed in the present study demonstrate the feasibility of using an externally applied, epoxy-bonded CFRP system to restore or increase the load-carrying capacity in shear of RC beams. The beam with CFRP strips and the beam with CFRP fabrics have completely different failure mechanisms. The failure of the strips is caused by concrete delamination underneath the epoxy, whereas failure of the fabrics occurs because of fiber rupture. Consequently, the CFRP strips increase the shear capacity more than the CFRP fabrics do. The present tests also indicate that the diagonal side strips (45 and 135 degrees) outperform vertical side strips in arresting the shear crack propagation and ultimate shear strength.
Shear strengthening of reinforced concrete beams using carbon-fibre-reinforced polymer laminates
To further understand the behavior of shear strengthening using externally bonded CFRP (carbon fiber reinforced polymer) laminates as the shear reinforcement, the following objective of this research have been established: To increase the test database of shear strengthening using externally bonded composites; To investigate the shear behavior and modes of failure of RC (reinforced conrete) beams with shear deficiencies after strengthening with CFRP laminates; To study the effect of various CFRP types and shear reinforcement configurations on the shear behavior of the beam; To propose design approaches that are based on experiments and analytical studies. Results of the test performed in the present study demonstrate the feasibility of using an externally applied, epoxy-bonded CFRP system to restore or increase the load-carrying capacity in shear of RC beams. The beam with CFRP strips and the beam with CFRP fabrics have completely different failure mechanisms. The failure of the strips is caused by concrete delamination underneath the epoxy, whereas failure of the fabrics occurs because of fiber rupture. Consequently, the CFRP strips increase the shear capacity more than the CFRP fabrics do. The present tests also indicate that the diagonal side strips (45 and 135 degrees) outperform vertical side strips in arresting the shear crack propagation and ultimate shear strength.
Shear strengthening of reinforced concrete beams using carbon-fibre-reinforced polymer laminates
Scherfestigkeitserhöhung von Stahlbetonträgern mittels Laminieren mit carbonfaserverstärktem Kunststoff
Zhang, Zhichao (author) / Hsu, Cheng-Tzu Thomas (author)
Journal of Composites for Construction ; 9 ; 158-169
2005
12 Seiten, 8 Bilder, 6 Tabellen, 11 Quellen
Article (Journal)
English
Shear Strengthening of Reinforced Concrete Beams Using Carbon-Fiber-Reinforced Polymer Laminates
| Online Contents | 2005
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