Full-Depth Threaded GFRP Rods for Enhanced Bond Performance

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Full-Depth Threaded GFRP Rods for Enhanced Bond Performance

Author(s): Donna Chen and Raafat El-Hacha

Publication: Special Publication

Volume: 322

Issue:

Appears on pages(s): 20.1-20.18

Keywords: mixed-mode, bond, finite element, Glass Fiber Reinforced Polymer, Ultra-High-Performance Concrete

Date: 6/18/2018

Abstract:
Experimental and analytical investigation into the performance of a special bond system was conducted on small-scale mixed-mode bending (MMB) specimens for implementation in a full-scale hybrid bridge deck system. Full-depth threaded Glass Fiber Reinforced Polymer (GFRP) rods, as a proposed replacement for commonly used GFRP shear studs, in conjunction with an epoxy bonded coarse silica sand aggregate layer, were used at the bond interface between a pultruded GFRP plate and cast-in-place Ultra-High Performance Concrete (UHPC). Findings show that the presence of the threaded GFRP rods increased the strength of the system up to 250% while utilizing 25% of the rod capacity. The full potential of full-depth threaded GFRP rods for bond and crack control can be explored in greater detail in future studies, including the application of nut tightening forces to increase initial clamping forces at the bond interface.