Experimental evaluation of the flexural behavior of corroded P/C beams |
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| Affiliation: | 1. University of Rome “Tor Vergata”, Italy;2. University “Gabriele d’Annunzio”, Chieti-Pescara, Italy;1. Tatum Smith Engineers, Inc., 1108 Poplar PI, Rogers, AR 72756, USA;2. Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;3. Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;4. The University of Arkansas, Department of Civil Engineering, 4190 Bell Engineering Center, Fayetteville, AR 72701, USA;5. Institute of Concrete Science and Technology (ICITECH), Universitat Politècnica de València, 4G, Camino de Vera s/n, 46022 Valencia, Spain;1. Cairo University, Faculty of Engineering, Structural Department, 6 El-Ashmawy, El-Mostashfa Street, El Haram, Giza, Egypt;2. Housing and Building National Research Center, Dokki, Giza, Egypt;3. Cairo University, Giza, Cairo, Egypt;1. University Niccolò Cusano, Roma, Italy;2. University of Rome Tor Vergata, Roma, Italy;1. Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education, Tongji University, Shanghai 200092, China;2. Department of Structural Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | Corrosion phenomena and related effects, such as size reduction in both rebars and strands, bond decay at steel–concrete interface, and cracking in the surrounding concrete, are particularly critical in prestressed-concrete members, not only for safety reasons, but also for their huge potential socio-economic effects. As a matter of fact, this technique has been used for the last 50 years in the majority of viaducts and bridges built in many countries like Italy.In order to evaluate the influence of the corrosion on prestressed pretensioned beams, a number of tests has been carried out in the Laboratory of the University of Rome “Tor Vergata”.Nine prestressed beams (section size 200 × 300; total length 3000 mm; clear span 2700 mm) were first subjected to artificial corrosion, to obtain different damage levels, and then were tested in four-point bending.The results clearly show the sizable effects that corrosion has on the ultimate capacity (that is significantly reduced), on the failure mode and on the structural response, that turns from ductile to brittle. |
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