Title: Interface Shear Capacity and Flexural Performance of Hybrid Beams

Author(s): Ravi Singh, Yukihiro Sato, Hitoshi Sasaki, David Mukai, Susumu Kono

Publication: Structural Journal

Volume:

Issue:

Appears on pages(s):

Keywords: coefficient of friction; concrete-to-concrete interface; concrete-to-steel interface; flexural capacity; hybrid beam; shear-friction capacity; shear-friction reinforcement; slab-web interface

DOI: 10.14359/51740482

Date: 1/24/2024

Abstract:
This paper introduces details of a new hybrid beam system connected to a reinforced concrete column. The hybrid beam system is a wide flange steel beam embedded in reinforced concrete beams on both ends without any shear connectors. The wide flange steel beam does not penetrate through the beam-column joint to reduce the fabrication cost compared to the typical steel beam-reinforced concrete column hybrid system. A total of ten hybrid beam specimens were designed with a slab-web interface. Four specimens were used to examine the shear sliding capacity at the slab-web interface, and an equivalent coefficient of friction at the interface, together with a method to evaluate the shear sliding capacity, was proposed. The remaining six specimens were used to examine the flexural capacity and plastic deformation capacity of the hybrid beam, and shear friction reinforcement details required for ductile flexural behavior were proposed.