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This paper presents a new method for deck-to-girder connections of glass fibre reinforced polymer (GFRP) bridge decks. To design the connection system, a GFRP deck in a rectangular cross-sectional shape is considered. The size of the shear bolts, bolt location, bolt spacing, and the size and type of stiffening plate are the variables considered in the design. The behavior of the proposed deck-to-girder connection system was analysed using commercial finite element analysis software. The failure of the connection system was checked by the Tsai-Hill criterion. Effective deckto-girder connection details for GFRP bridge decks are identified and presented based on the results of the analysis. Résumé :Le présent article présente une nouvelle méthode de raccorder des tabliers en PRFV et des poutres. Afin de concevoir le système de raccordement, un tablier en PRFV de section rectangulaire est examiné. La dimension des boulons de cisaillement, leur emplacement, leur espacement et la plaque de raidissement sont les variables considérées lors de la conception. Le comportement du système proposé de raccordement tablier-poutres a été analysé par un logiciel commercial d'analyse par éléments finis. La défaillance du système de raccordement a été vérifiée en utilisant le critère Tsai-Hill. D'après les résultats de cette analyse, les détails d'un raccordement efficace tablier-poutres pour les tabliers de pont en PRFV sont identifiés et présentés dans cet article.Mots clés : tabliers de ponts, fibres de verre, raccordements boulonnés, extrusion par étirage.[Traduit par la Rédaction] Park et al. 254

Repair materials for concrete structures are often required to exhibit high bond strength at a concrete substrate, and it typically consists of ordinary Portland cement (OPC) incorporating expensive admixtures at a low water-to-binder ratio. Meanwhile, cementless mortar employs alkali-activation of cementless and pozzolanic precursors such as ground granulated blast-furnace slag (GGBFS) and fly ash (FA). The final product develops strength relatively faster than OPC, and its strength can be flexibly talyored by controlling the type and dosage of the activator. The present study investigates the strength development characteristic of cementles mortar for use in repair of concrete structures. Independent variables include mix proportions and curing conditions, which were chosen to optimize the performance of the cementless mortar.