The design of concrete strengthening by the application of steel plates bonded to the concrete surface requires a very good knowledge of the mechanical behavior of the strengthened structures. The paper deals with following aspects of the behavior of bonded steel plates: (a)Local behavior of a bonded steel plate in the vicinity of a crack. This study reveals local bending of the plate. The influence of the different parameters has been invistigated.(b)Study of assmbly failures. It is possible to predict the failure of repaired structures strengthened under normal force, bending moment and with regards to shearing force when using the concepts of brittle fracture mechanics. Some experimental determination of the energy release rate is presented.(c)Distribution of deformations between reiforced bars and bonded steel plates. Calculations carried out on a numerical model of reinforced concrete tie member show that the hypothesis of plane deformation is not verified. These partials results need to be confirmed by experience.
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- Repair and Strengthening of Bridges by Means of Bonded Plates
J. N. Theillout
- Springer US
Systemische Notwendigkeit zur Weiterentwicklung von Hybridnetzen