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Résumé L'application du collage au renforcement des ponts en béton armé et béton précontraint en cas d'insuffisance de l'armature semble être, dans certains cas, très économique et utile. On a appliqué le collage à ce système de renforcement pour la reconstruction de quelques ponts en Pologne. On présente trois cas dans cet article.
Summary Application of gluing of reinforcing steel to the surfaces of concrete structures seems to be one of the most economic and practical system of strengthening reinforced and prestressed concrete bridges. This method can be applied in many cases of insufficient reinforcing steel in reconstructed bridges. Epoxy resins ensure glued joints with sufficient strength and long term resistance. This system of strengthening has been applied to reconstruct several bridges in Poland. Three examples are described in this paper. In one of these bridges the gluing of reinforcing steel was performed in the upper surfaces of Gerber-plate bridge concrete in negative bending moment areas. The flat steel strips, well cleaned and protected against corrosion, were glued to the specially prepared surface concrete. The other repair work consisted in gluing the flat iron strips on the lower surface of the concrete bridge plate. In this case, high strength bolts were used to fasten the ends of the steel bands to the bridge slab. All the work of strengthening was performed during the winter at low temperatures, from 0 to −20°C. Equally extensive strengthening work with the aid of gluing was performed during adaptation to new loads of the old concrete viaducs in the area of Central Railway Station in Warsaw. Here the steel strips and the additional reinforcing steel were glued to the side surface of the concrete slabs. Anchoring bolts were used in all cases. This method of gluing flat steel strips to strengthen insufficiently reinforced concrete bridges is very simple and economic compared with others.
Résumé L'application du collage au renforcement des ponts en béton armé et béton précontraint en cas d'insuffisance de l'armature semble être, dans certains cas, très économique et utile. On a appliqué le collage à ce système de renforcement pour la reconstruction de quelques ponts en Pologne. On présente trois cas dans cet article.
Summary Application of gluing of reinforcing steel to the surfaces of concrete structures seems to be one of the most economic and practical system of strengthening reinforced and prestressed concrete bridges. This method can be applied in many cases of insufficient reinforcing steel in reconstructed bridges. Epoxy resins ensure glued joints with sufficient strength and long term resistance. This system of strengthening has been applied to reconstruct several bridges in Poland. Three examples are described in this paper. In one of these bridges the gluing of reinforcing steel was performed in the upper surfaces of Gerber-plate bridge concrete in negative bending moment areas. The flat steel strips, well cleaned and protected against corrosion, were glued to the specially prepared surface concrete. The other repair work consisted in gluing the flat iron strips on the lower surface of the concrete bridge plate. In this case, high strength bolts were used to fasten the ends of the steel bands to the bridge slab. All the work of strengthening was performed during the winter at low temperatures, from 0 to −20°C. Equally extensive strengthening work with the aid of gluing was performed during adaptation to new loads of the old concrete viaducs in the area of Central Railway Station in Warsaw. Here the steel strips and the additional reinforcing steel were glued to the side surface of the concrete slabs. Anchoring bolts were used in all cases. This method of gluing flat steel strips to strengthen insufficiently reinforced concrete bridges is very simple and economic compared with others.
Renforcement des ponts par collage de l'armature
Rybak, M. (author)
Matériaux et Construction ; 16 ; 13-17
1983-01-01
5 pages
Article (Journal)
Electronic Resource
French
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