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A platform for research: civil engineering, architecture and urbanism
Rehabilitation of cracked and corroded reinforced concrete beams with fiber-reinforced plastic patches
The repair and rehabilitation of reinforced concrete structures in coastel areas is a major challenge. The existence of cracks and other damage is the main cause of structural fatigue. This paper evaluates the effectiveness of combining the corrosion protection and the FRP strengthening techniques. Some analytical models are developed to estimate the ultimate load carrying capacity of corroded FRP patched RC beams. The equally spaced U-anchorage strips together with the longitudinal strips form an external reinforcing system for the corroded RC beam. This type of arrangement can improve the load carrying capacity of cracked and corroded RC beams and provides the space for coating the corrosion protection materials. However, the use of equally spaced U-anchorage strips to hold longitudinal strips constrains the extension of the fiber in the longitudinal direction in the intersection area. The strain value is higher at this site, but it enables the full usage of the fibrous composite material's strength. Hence any design that can reduce the stress concentration effect at the intersection area of the longitudinal and U-shaped anchorage strips may help the beam to escape from the premature failure mode of fiber breakage and reach its designed load carrying capacity. The analytical method can approximately predict the ultimate loads of FRP patched corroded beams.
Rehabilitation of cracked and corroded reinforced concrete beams with fiber-reinforced plastic patches
The repair and rehabilitation of reinforced concrete structures in coastel areas is a major challenge. The existence of cracks and other damage is the main cause of structural fatigue. This paper evaluates the effectiveness of combining the corrosion protection and the FRP strengthening techniques. Some analytical models are developed to estimate the ultimate load carrying capacity of corroded FRP patched RC beams. The equally spaced U-anchorage strips together with the longitudinal strips form an external reinforcing system for the corroded RC beam. This type of arrangement can improve the load carrying capacity of cracked and corroded RC beams and provides the space for coating the corrosion protection materials. However, the use of equally spaced U-anchorage strips to hold longitudinal strips constrains the extension of the fiber in the longitudinal direction in the intersection area. The strain value is higher at this site, but it enables the full usage of the fibrous composite material's strength. Hence any design that can reduce the stress concentration effect at the intersection area of the longitudinal and U-shaped anchorage strips may help the beam to escape from the premature failure mode of fiber breakage and reach its designed load carrying capacity. The analytical method can approximately predict the ultimate loads of FRP patched corroded beams.
Rehabilitation of cracked and corroded reinforced concrete beams with fiber-reinforced plastic patches
Wiederinstandsetzung brüchiger und korrodierter Stahlbetonträger mit faserverstärkten Kunststoffstreifen
Wang, Chung-Yue (author) / Shih, Chien-Chih (author) / Hong, Shao-Chih (author) / Hwang, Wei-Chih (author)
Journal of Composites for Construction ; 8 ; 219-228
2004
10 Seiten, 11 Bilder, 7 Tabellen, 12 Quellen
Article (Journal)
English
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