INTELLIGENT SUPER SKIN - Enhanced Durability for Concrete Members

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Interface Shear Transfer on Composite Concrete Members

Publication . Santos, Pedro M. D.; Júlio, Eduardo N. B. S.

The "shear-friction theory" was adopted in design codes to predict the longitudinal shear strength between parts of concrete members cast at different times. This is a relevant subject for different situations, such as the connection between precast members with castin- place parts and strengthening of existing reinforced concrete (RC) members with a new concrete layer. The bond strength of the interface is controlled by parameters such as the substrate roughness, curing conditions, and the material strength and stiffness of both concrete layers, among others. Some of these for example, differential shrinkage due to different curing conditions, and differential stiffness due to the difference in the Young's modulus of each layer are not addressed in codes. This paper presents recommendations and proposes an alternative design approach for concrete-to-concrete interfaces that can be adopted in future revisions of ACI 318 and Eurocode 2. A comparison between ACI 318 and Eurocode 2 is presented.

2014-01-01Artigo científico

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Palavras-chave

durability,concrete,interfaces,FRC (Fibre Reinforced Concrete), Engineering and technology ,Engineering and technology/Civil engineering

Entidade financiadora

Fundação para a Ciência e a Tecnologia, I.P.

Programa de financiamento

Concurso para Projectos de I&D em todos os Domínios Científicos - 2008

Número da atribuição

PTDC/ECM/098497/2008