FraMCoS 5 2004 Vail, Colorado, USA

Influence of Concrete Material Ductility on the Behavior of Stud Shear Connection

This paper presents an experimental study on the influence of concrete material ductility on crucial performance of stud shear connection, including failure mode, slip capacity, and ultimate strength. A series of pushout specimens were tested for this evaluation by using…

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Year 2004
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Abstract

This paper presents an experimental study on the influence of concrete material ductility on crucial performance of stud shear connection, including failure mode, slip capacity, and ultimate strength. A series of pushout specimens were tested for this evaluation by using a unique strain-hardening fiber reinforced Engineered Cementitious Composites (ECC). Normal concrete was adopted as the reference material. The experimental results show that the shear connection with ECC exhibits a more ductile failure mode, higher slip capacity and ultimate strength compared to connection with concrete. The superior ductility of ECC was clearly reflected by microcrack development near the shear studs, suppressing the localized fracture mode typically observed in concrete material. This significant enhancement of ductility suggests that the use of ECC material can be effective in redistributing loads among the shear studs and in improving composite action between steel girder and concrete bridge deck.