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Experimental Study on Bending Behavior of Corroded Post-Tensioned Concrete Beams
Nine post-tensioned concrete (PC) beams were made and corroded by impressing direct current to them. The influences of different factors, such as the corrosion ratio of prestressing tendons, grouting condition etc., were taken into consideration. The failure modes and mechanism of corroded PC beams were investigated by monotonic loading tests. The experimental results showed that the higher the corrosion ratio of prestressing tendons is the lower the cracking, yielding and ultimate capacities of the PC beams will be. With the development of the corrosion of prestressing tendons, the characteristics of load-deflection curves of PC beams are no longer similar with that of uncorroded PC beams, but turn into that of reinforced concrete beams. The prestressing tendons will be easier to corrode for a beam with bad grouting condition, and the corrosion will lead to severe deterioration of the bond strength between concrete and prestressing tendons that will greatly reduce the stiffness of the beam.
Experimental Study on Bending Behavior of Corroded Post-Tensioned Concrete Beams
Nine post-tensioned concrete (PC) beams were made and corroded by impressing direct current to them. The influences of different factors, such as the corrosion ratio of prestressing tendons, grouting condition etc., were taken into consideration. The failure modes and mechanism of corroded PC beams were investigated by monotonic loading tests. The experimental results showed that the higher the corrosion ratio of prestressing tendons is the lower the cracking, yielding and ultimate capacities of the PC beams will be. With the development of the corrosion of prestressing tendons, the characteristics of load-deflection curves of PC beams are no longer similar with that of uncorroded PC beams, but turn into that of reinforced concrete beams. The prestressing tendons will be easier to corrode for a beam with bad grouting condition, and the corrosion will lead to severe deterioration of the bond strength between concrete and prestressing tendons that will greatly reduce the stiffness of the beam.
Experimental Study on Bending Behavior of Corroded Post-Tensioned Concrete Beams
Zeng, Y. H. (author) / Huang, Q. H. (author) / Gu, X. L. (author) / Zhang, W. P. (author)
12th Biennial International Conference on Engineering, Construction, and Operations in Challenging Environments; and Fourth NASA/ARO/ASCE Workshop on Granular Materials in Lunar and Martian Exploration ; 2010 ; Honolulu, Hawaii, United States
Earth and Space 2010 ; 3521-3528
2010-03-11
Conference paper
Electronic Resource
English
Shear Behavior of Corroded Post-Tensioned Prestressed Concrete Beams with Full/Insufficient Grouting
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