Prevention of Peeling Failure in Plated Beams
| Autor: | Houssein Abdel-Raouf, Hamdy H. Shahin, Hossam El-Din M. Sallam, Abd-Allah M. Saba |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Journal of Advanced Concrete Technology. 2:419-429 |
| ISSN: | 1347-3913 1346-8014 |
| Popis: | Peeling failure is one of the main drawbacks of reinforced concrete (RC) members strengthened by externally bonded plates. Two different techniques are suggested to prevent peeling failure at the ends of steel plates glued to the soffits of RC beams. In the first technique, concrete cover is replaced by grout to enhance the resistance of substrate to crack initiation and propagation. In the second technique, permanent compressive forces at the ends of bonded plate are applied using different plate end anchorage systems, i.e. end anchorage by bolts or by clamps. Furthermore, two different sizes of side plates, with and without end anchorage, are glued to the plated beam to delay or prevent the peeling failure. An analytical model is suggested to predict the load-deflection behavior of beams strengthened by bonded steel plates at the bottom and sides of the beams. The results of 4PB tests indicate that conventional plated beam (PB) experience reduction in ductility and limited enhancement in ultimate load, which increased only by 22% compared to unplated beams due to the occurrence of peeling failure. Peeling failure of plated beams can be prevented through the use of either a concrete cover replacement technique or bolted anchorage systems. Anchorage of a side plated beam increased the ultimate load by 264% compared to an unplated beam and 217% compared to PB. |
| Databáze: | OpenAIRE |
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