Title: Effect of Deterioration of Bond of Beam Bars Passing through Interior Beam-Column Joints on Flexural Strength and Ductility

Author(s): Shigeru Hakuto, Robert Park, and Hitoshi Tanaka

Publication: Structural Journal

Volume: 96

Issue: 5

Appears on pages(s): 858-864

Keywords: bonding (bonding strength); flexural strength; joints (junc-tions); slippage

DOI: 10.14359/740

Date: 9/1/1999

Abstract:
The effect of slippage of longitudinal beam bars passing through interior beam-column joints on the available flexural strength and ductility of the plastic hinge regions in the beams adjacent to the joint core is studied. The slippage occurs as a result of high bond stresses in interior beam-column joints, leading to bond deterioration during earthquake loading. The loss of compression reinforcement as a result of bar slippage in the joint core reduces both the available flexural strength and ductility of the adjacent beam.