Improvement of fatigue properties of orthotropic decks

Frýba, Ladislav; Urushadze, Shota

doi:10.1016/j.engstruct.2010.12.036

Cited by 6 publications

(4 citation statements)

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“…This makes them particularly attractive for retrofitting historic metallic structures, because they overcome the non-weldability of certain metals, they do not require the modification of the initial architectural design of the structure, and/or add dead weight to the initial configuration [5][6][7][8][9]. Nowadays, many authors agree on the effectiveness of bonding FRP composites to rehabilitate metallic structures [10,11]. An excellent review on this topic citing 163 references is published in [12].…”

Section: Constitutive Equationsmentioning

confidence: 99%

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Modelling of Strengthened Steel Connections under Static and Cyclic Loading

Khelifa

Khennane²,

Oudjene

2022

Buildings

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The rehabilitation of steel structures with Fibre Reinforced Polymers (FRP’s) may appear less effective because they can be bolted or welded with steel plates that display the same mechanical properties. However, this technique has some unwanted consequences such as additional dead weight and an increased risk of corrosion. The aim of the proposed study, therefore, is to present a technique for modelling steel connections strengthened with FRP’s. Two types of composites: Carbon Fibre Reinforced Polymer (CFRP) and Glass Fibre Reinforced Polymer (GFRP) are considered. They are used to strengthen welded steel connections. The main objective consists in evaluating the effect of the reinforcement on the load-carrying capacity of these connections under monotonic and cyclic loadings. The steel is considered to behave in a linear elastic perfectly plastic fashion with isotropic strain hardening, and the FRP’s are assumed to behave linearly up to failure. The behaviour of the adhesive is modelled with the Cohesive Zone Model (CZM) available in Abaqus. Lastly, a parametric study is carried out to investigate the eventuality of strengthening connections made with I-sections, which are very common in practice.

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Section: Constitutive Equationsmentioning

confidence: 99%

“…Nowadays, many authors agree on the effectiveness of bonding FRP composites to rehabilitate metallic structures [10,11]. An excellent review on this topic citing 163 references is published in [12].…”

Section: Introductionmentioning

confidence: 99%

Modelling of Strengthened Steel Connections under Static and Cyclic Loading

Khelifa

Khennane²,

Oudjene

2022

Buildings

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“…Nevertheless, closed ribs are more widely used in orthotropic bridges than open ribs because open ribs are less efficient and require more welding [9,10]. Thus, numerous studies on orthotropic decks have focused on the fatigue behaviors of closed rib bridge decks [11][12][13], with far fewer studies conducted on orthotropic decks stiffened with open ribs. In particular, in the case of orthotropic decks stiffened with open ribs such as L or bulb ribs, which require a considerable amount of intricate welding details, it is difficult to evaluate the deformation shape and stress level in the welding detail because of the asymmetric longitudinal ribs and deformation against moving loads in the longitudinal direction [14].…”

Section: Introductionmentioning

confidence: 99%

Behavior and stress of orthotropic deck with bulb rib by surface corrosion

Kainuma

Jeong

Ahn

et al. 2015

Journal of Constructional Steel Research

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“…Dans le cas d'ouvrages métalliques anciens, la méthode semble particulièrement séduisante comparée aux techniques de réparation traditionnelles, puisqu'elle permet de pallier à la non-soudabilité de certains aciers, sans modifier le dessin architectural initial de la structure et sans apport de masse. En outre, de nombreux auteurs s'accordent sur la validité de la technique de collage de composites pour le renforcement de structures métalliques vis-à-vis de la fatigue (Fryba et al, 2011). En France, l'utilisation du collage structural sur substrat métallique a été approfondie par Si Larbi et al (2007) dans le cadre d'une application sur ponts mixtes métal/béton.…”

Section: Introductionunclassified

Flambement d’un panneau composite auto-raidi réalisé par infusion de résine. Etude numérique et expérimentale

Perret¹,

Mistou²,

Fazzini³

2012

Revue des composites et des matériaux avancés

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La technique de réparation/renforcement des structures de génie civil en béton par composites collés est aujourd'hui couramment utilisée en France. Elle constitue l'un des outils permettant d'augmenter la durée de vie des parcs d'ouvrages en béton. Dans le cas des ouvrages en acier, son utilisation reste cependant beaucoup plus limitée. Ceci résulte sans doute du fait que les matériaux composites et l'acier présentent des rigidités très voisines, mais aussi de l'appréhension à utiliser le collage structural comme méthode d'assemblage. Dans le cadre d'une opération de recherche de l'IFSTTAR (Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux), le Département Laboratoire d'Autun s'est intéressé aux assemblages collés entre renforts composites et supports métalliques de type acier Cet article rappelle dans un premier temps les domaines d'utilisation de la technique de collage ainsi que ses avantages, puis s'intéresse à la caractérisation du transfert des efforts par collage entre matériaux composites et métal. L'influence du vieillissement hygrothermique (40°C, 95% d'humidité relative) ou de pseudo cycles de fatigue sur les caractéristiques de l'assemblage collé est ensuite étudiée afin évaluer la durabilité de l'interface composite/acier. Bien qu'il reste des sujets à approfondir, le travail réalisé montre que le renforcement par collage de matériaux composites est une technique viable pour les structures en acier. ABSTRACT. Nowadays, externally bonded composites are currently used for the rehabilitation or strengthening of concrete infrastructures. Such a technique allows to increase the service life of concrete bridges. In the case of steel structures, this technique is much less popular. This may be due to the similarity of composites and steel in terms of stiffness, but also to the reluctance of infrastructures owners with regards to structural adhesive bonding. In the framework of a research project regarding the repair of steel structures and led by IFSTTAR, the Département Laboratoire d'Autun got interested in composite/steel bonded assemblies. This article first introduces the adhesive bonding technique and its advantages, and discusses the stress transfer mechanisms at the composite/steel interface. Then, influence of hydrothermal ageing (at 40°C and 50% relative humidity) or pseudo fatigue cycles on the characteristics of the composite/steel adhesive bond is investigated in order to assess the durability. Although further work is needed, those preliminary results show that the bonding of external composite reinforcements is a suitable technique for steel structures.

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Improvement of fatigue properties of orthotropic decks

Cited by 6 publications

References 1 publication

Modelling of Strengthened Steel Connections under Static and Cyclic Loading

Modelling of Strengthened Steel Connections under Static and Cyclic Loading

Behavior and stress of orthotropic deck with bulb rib by surface corrosion

Flambement d’un panneau composite auto-raidi réalisé par infusion de résine. Etude numérique et expérimentale

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