Strength and behaviour of deep beams - Reinforced Concrete Deep Beams - page 37

Figure 2.14 Effect of bond failure on stress conditons in compressive zone.
In order to use the concept as the basis for description of the causes of failure
of structural concrete members it is essential to visualise the shape of the path
along which a compressive force is transmitted to the support. This is not
Figure 2.15 Path of compressive force and corresponding outline of compressive stress trajectories
for RC beams with various a/d ratios.