Method for determining the minimum anchorage length of reinforcement in concrete: an experimental study
Oleksandr Chapiuk, Oleh Kratiuk, Iryna Zadorozhnikova, Inna Boiarska, Vadym Rud, Maksym Boiarskyi, Ihor Mudryy, Andriy Pelekh
Abstract
The minimum anchoring length of the reinforcement in concrete under both single and repeated loads was experimentally determined. The limiting state of reinforcement adhesion to concrete occurs when the displacement of the free end of the rods relative to the concrete is 0.2 mm. Experiments confirmed that when reinforcement is used in a section with full design resistance, the minimum length of rod anchoring relative to this section should be at least 15d. The stresses in the rods that occur at the ultimate state of adhesion depend linearly on the anchoring length. Repeated operational level loads lead to residual slippage of the rods and do not influence the stresses in the reinforcement at ultimate state compared to a single load.