Steel-reinforced resin for bolted shear connectors: Confined behaviour under quasi-static cyclic loading

Injections bolts were initially conceptualized to repair riveted connections in bridges with long service lifetime and now they are widely used steel composite structures. Injecting steel-reinforced epoxy resin bolted oversized holes is a novel approach enable fast easy assembly of structures while limiting slip between the components. The performance these shear connectors mainly dependent on injected material. In this paper, short-term mechanical properties an epoxy-based mixed shots (steel-reinforced resin) evaluated consider it for connectors. Uniaxial static tests allowed compare stiffness ductility define hardening law, multiaxial conducted under quasi-static cyclic loading order characterize material behaviour confined conditions. Steel-reinforced specimens showed conditions 2.6 times higher compared bare specimens. This increase fundamental achieve resistant when resin-injected significantly holes. linear Drucker-Prager plastic model was behaviour. good agreement observed indicates that future investigations numerical experimental can be implemented parameters proposed paper.