Hochfeste Bewehrung S 670 in biegebeanspruchten Stahlbetonbauteilen - Vergleich des Riss- und Verbundverhaltens von hochfester und herkömmlicher Bewehrung

High-strength reinforcement in concrete members subjected to bending

High strength reinforcement has been used in geotechnical applications and for structural applications in columns and shear walls for more than 10 years. A recent research program dealt with the application for flexural members. The main topics were the bond behavior and the crack width prediction of S 670 as compared to common reinforcement B 500 B and higher strength reinforcement S 600 which has a similar relative rib area as S 670.
In the project the bond behavior was tested and a bond stress-slip relationship was developed. Further, the crack calculation according to EN 1992-1-1 was adapted. This report gives a summary of the main results of the research report and shows a comparison of the calculated, numerical and experimental results of crack width for different specimen.