• Curbach, Manfred
• Wagner, Juliane

Abstract

<p>Whilst the material behaviour of carbon reinforced concrete under static loading is well investigated, the one under cyclic loading still needs to be researched extensively. The following investigations were carried out with a material combination used for new constructions out of carbon reinforced concrete. Distinguishing between the tensile and the bond behaviour, first static reference tests were carried out for determining the loads to be applied in the cyclic tests. Afterwards failure modes, the stress-strain behaviour and the development of strain and deformation during the cyclic tests, S-N diagrams and the residual strengths were regarded. As enough cyclic tensile tests were done, the tensile fatigue strength can be estimated at 80 to 85 % of the static tensile strength. The bond tests were carried out at just one load level but with different anchorage lengths. Nonetheless, the results show that the bond behaviour of the investigated material combination is crucial. Due to the occurred failure mode only a maximum of 90 % of the static tensile stress could be reached in static bond tests, independent from the anchorage length. It was found that the necessary anchorage length for transmitting the maximum reachable bond loads is the threefold of the fibre strand distance for the investigated textile grid.</p>

Topics

• impedance spectroscopy
• Carbon
• strength
• stress-strain behavior
• fatigue
• tensile strength