3. Behavior along a rework surface (concrete-concrete interface)
3.1 State of the art
The behavior of the interface subjected to longitudinal shear stresses can be described using shear-friction theory.
It should be noted, however, that the term "shear-friction theory" is misleading because it actually encompasses several other physical and mechanical phenomena.
This theory is based on the initial assumption that the mechanism for transmitting shear stresses at a transfer surface (concrete interface) subjected to external shear and compression forces is provided exclusively by friction. As a general rule, a simple "sawtooth" model is used to illustrate the fundamentals of this approach (Figure
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Behavior along a rework surface (concrete-concrete interface)
Assumptions for sizing the recovery area
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