Title: Analysis of Bond Deterioration Process in Reinforced Concrete Beam-Column Joints Subjected to Seismic Loading

Author(s): T. Tada and T. Takeda

Publication: Symposium Paper

Volume: 123

Issue:

Appears on pages(s): 443-464

Keywords: beams (supports); bond (concrete to reinforcement); bond stress; columns (supports); deterioration; earthquake-resistant structures; hinges (structural); hysteresis; joints (junctions); reinforced concrete; slippage; structural analysis; Structural Resea

DOI: 10.14359/2891

Date: 1/1/1991

Abstract:
Describes a theoretical investigation into the hysteretic behavior of hinges in reinforced concrete members subjected to seismic loading. The most important feature of this study is the quantitative evaluation of bond deterioration process between the main reinforcement steel and concrete. An analytical procedure is formulated and a computer program for assessing bond deterioration is developed. End hinges and adjacent bond regions in reinforced concrete members are represented by mathematical models that consist of steel elements, concrete fiber elements, and bond links. Assuming appropriate constitutive curves for these elements, the equilibrium condition of section forces in a hinge is obtained iteratively. This analytical method is applied to the problem of slippage of beam bars in reinforced concrete cruciform beam-column joint subassemblages. The analytical results aptly explain the transient processes of structural behavior observed in experiments, and the quantitative assessment of bond deterioration processes is accomplished satisfactorily.