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A platform for research: civil engineering, architecture and urbanism
Modeling of tension-stiffening behavior of reinforced concrete ties strengthened with fiber reinforced plastic sheets
This paper deals with modeling the cracking behavior of RC ties strengthenend with FRP laminates. The approach is onedimensional but allows introducing any nonlinear constitutive relationship for materials and bond laws. Furthermore, the formation of the first crack and crack propagation can be taken into account. The model does not include cyclic behavior for materials and bond laws and thus neglects possible unloading of concrete at cracked sections when a new crack forms. The model allows introduction of whatever material and bond relationship is desired to evaluate crack pattern and tension-stiffening behavior in detail. The numerical analysis comparing elements with the same equivalent reinforcement percentage, but composed of a different amount of steel and FRP, has shown negligible variation of stiffness before steel yielding, while there is a relevant increment after steel yielding; however, the crack widths also are reduced by the application of fibers before steel yielding. Finally, tension-stiffening results are lower in strengthened elements because crack spacing reduces the influence of steel bond degradation near cracks, with an effect that is higher than the increasing of stiffness due to fibers. The model can be easily extended to the RC element in bending.
Modeling of tension-stiffening behavior of reinforced concrete ties strengthened with fiber reinforced plastic sheets
This paper deals with modeling the cracking behavior of RC ties strengthenend with FRP laminates. The approach is onedimensional but allows introducing any nonlinear constitutive relationship for materials and bond laws. Furthermore, the formation of the first crack and crack propagation can be taken into account. The model does not include cyclic behavior for materials and bond laws and thus neglects possible unloading of concrete at cracked sections when a new crack forms. The model allows introduction of whatever material and bond relationship is desired to evaluate crack pattern and tension-stiffening behavior in detail. The numerical analysis comparing elements with the same equivalent reinforcement percentage, but composed of a different amount of steel and FRP, has shown negligible variation of stiffness before steel yielding, while there is a relevant increment after steel yielding; however, the crack widths also are reduced by the application of fibers before steel yielding. Finally, tension-stiffening results are lower in strengthened elements because crack spacing reduces the influence of steel bond degradation near cracks, with an effect that is higher than the increasing of stiffness due to fibers. The model can be easily extended to the RC element in bending.
Modeling of tension-stiffening behavior of reinforced concrete ties strengthened with fiber reinforced plastic sheets
Modellierung des Spannungsversteifungsverhaltens von mit faserverstärkten Kunststoffplatten verstärkten Stahlbetonverbindungen
Pecce, Marisa (author) / Ceroni, Francesca (author)
Journal of Composites for Construction ; 8 ; 510-518
2004
9 Seiten, 17 Bilder, 2 Tabellen, 28 Quellen
Article (Journal)
English
| British Library Online Contents | 2004
| British Library Online Contents | 2004