Abstract
The uniform truss mechanism is widely accepted as a shear transfer mechanism reinforced concrete members. However, the uniform truss action cannot be expected when the bond stress distribution is not constant along longitudinal bars. A test method, in which only the truss action takes place, is developed and conducted to investigate the truss actions under various bond contributions. Based on the experiments and analysis, following findings have been obtained; 1) The bond stress distribution depends on the axial compression force, the amount of shear reinforcement and loading conditions. 2) The analysis using the composite truss model composed of regular and fan-shape trusses can predict the experimental results.
