A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Bond of Substandard Laps in Reinforced Concrete Beams Retrofitted with Post-Tensioned Metal Straps
This paper investigates the bond-splitting performance of lapped steel bars in tension. Twelve reinforced concrete (RC) beams with substandard laps (lap length = 25 bar diameters) at midspan were tested in flexure. The variables examined include the bar diameter, concrete cover, and three different confinement conditions at midspan: 1) no confinement; 2) internal steel stirrups; and 3) external post-tensioned metal straps (PTMSs). The test results show that, in comparison to unconfined specimens, PTMS confinement enhances the bond strength of the lapped bars by up to 120%. Based on the results of this study, an innovative equation is proposed and validated to calculate the additional bond strength provided by PTMS confinement. The equation can be used for assessment and retrofit of substandard lapped bars in RC structures and should prove useful in practical retrofitting applications.
Bond of Substandard Laps in Reinforced Concrete Beams Retrofitted with Post-Tensioned Metal Straps
This paper investigates the bond-splitting performance of lapped steel bars in tension. Twelve reinforced concrete (RC) beams with substandard laps (lap length = 25 bar diameters) at midspan were tested in flexure. The variables examined include the bar diameter, concrete cover, and three different confinement conditions at midspan: 1) no confinement; 2) internal steel stirrups; and 3) external post-tensioned metal straps (PTMSs). The test results show that, in comparison to unconfined specimens, PTMS confinement enhances the bond strength of the lapped bars by up to 120%. Based on the results of this study, an innovative equation is proposed and validated to calculate the additional bond strength provided by PTMS confinement. The equation can be used for assessment and retrofit of substandard lapped bars in RC structures and should prove useful in practical retrofitting applications.
Bond of Substandard Laps in Reinforced Concrete Beams Retrofitted with Post-Tensioned Metal Straps
Helal, Yasser (author) / Garcia, Reyes / Pilakoutas, Kypros / Guadagnini, Maurizio / Hajirasouliha, Iman
ACI structural journal ; 113
2016
Article (Journal)
English
| Taylor & Francis Verlag | 2014
Strengthening of short splices in RC beams using Post-Tensioned Metal Straps
| British Library Online Contents | 2016
Strengthening of short splices in RC beams using Post-Tensioned Metal Straps
| Online Contents | 2014