Application de Ia MEF pour l'evaluation et I' etude du renforcement des pouts du type dalle de beton sur poutres d' acier
Keywords:
Constitutive law, contact, finite element, lateral buckling, on composite bridge, shell, strengthening efficiency, strengthening technique, ultimate capacityAbstract
In order to predict/he ultimate capacity of bridges composed of a concrete slab laying on steel girders, we present a finite element model which allows the modeling of a concrete slab, steel girders and the steel-concrete interface. In the first two cases, we use a six-node (DLTP) triangular shell element. For concrete, a hypoe/astic constitutive law taking into account cracking and the tension stiffening effect is used. For steel, we use an elastic-perfectly plastic model. The concrete-steel interface is represented by a contact element with a friction law which either includes a surface deterioration model, or by a stud element when a composite action is mobilized. The model was validated with e.\perimental tests. In order to sllldy a strengthening technique using post-stressed bolts, a parametric study was carried out.
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