TY - GEN

T1 - Mechanical properties of (steel-reinforced) resins used in injected bolted connections

AU - Nijgh, Martin

AU - Xin, Haohui

AU - Veljkovic, Milan

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2019

Y1 - 2019

N2 - This paper illustrates the most recent developments in the field of injected bolted connections. A novel injection material, steel-reinforced resin, is used to enhance stiffness of resin-injected bolted shear connections. The main goal is to achieve the slip resistance connection in a clearance holes without pre-tensioning of bolts. Steel-reinforced resins consist of spherical steel particles embedded in an epoxy resin matrix. Steel-reinforced resins are characterized by a higher Young’s Modulus compared to the bare epoxy resin. Numerical and analytical prediction methods for the quasi-static mechanical behaviour of steel-reinforced resins are presented and validated based on small-scale compression tests. The design of a tailor-made test setup, the simple pin connection, is presented. This setup allows for investigation of a generic behaviour of steel-reinforced resins subject to cyclic loading in confined conditions. Preliminary results obtained with the simple pin connection specimens are shown and improvements of the setup, specimens and process are discussed. An overview of potential applications focusing on easy and fast execution, dissembling and reuse of steel and steel/concrete structures is presented.

AB - This paper illustrates the most recent developments in the field of injected bolted connections. A novel injection material, steel-reinforced resin, is used to enhance stiffness of resin-injected bolted shear connections. The main goal is to achieve the slip resistance connection in a clearance holes without pre-tensioning of bolts. Steel-reinforced resins consist of spherical steel particles embedded in an epoxy resin matrix. Steel-reinforced resins are characterized by a higher Young’s Modulus compared to the bare epoxy resin. Numerical and analytical prediction methods for the quasi-static mechanical behaviour of steel-reinforced resins are presented and validated based on small-scale compression tests. The design of a tailor-made test setup, the simple pin connection, is presented. This setup allows for investigation of a generic behaviour of steel-reinforced resins subject to cyclic loading in confined conditions. Preliminary results obtained with the simple pin connection specimens are shown and improvements of the setup, specimens and process are discussed. An overview of potential applications focusing on easy and fast execution, dissembling and reuse of steel and steel/concrete structures is presented.

KW - Steel-reinforced resin

KW - epoxy resin

KW - homogenization

KW - finite element simulation

M3 - Conference contribution

BT - Proceedings of the 22nd International Conference on Composite Materials

PB - International Committee on Composite Materials

ER -