Bond Action Between Concrete and a Deformed Bar - A New Model

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Title: Bond Action Between Concrete and a Deformed Bar - A New Model

Author(s): D. Z. Yankelevsky

Publication: Journal Proceedings

Volume: 82

Issue: 2

Appears on pages(s): 154-161

Keywords: bond (concrete to reinforcement); bond stress; models; reinforced concrete; strains; stresses; structural analysis.

Date: 3/1/1985

Abstract:
A new model for bond action between untracked concrete and a deformed bar is presented. Concrete resistance is provided by a mechanical system which consists of inclined compressive elements, discs normal to the bar axis, and longitudinal tensile members. The kinematics of the system is analyzed, yielding a second order differential equation with the bar tensile force as variable. Stress and strain distributions in the steel bar are solved and results are compared with test data. Good correspondence between measured and calculated strain distributions along a steel bar are found at stresses below 160 MPa (23 ksi).