In the course of bond research of reinforced concrete for the past decades, the pull-out test with a bond length lb of 5 times the bar diameter ds established as the standard to investigate the local bond behaviour. Despite the known disadvantages of this test setup, results of pull-out tests build the basis for bond stress-slip relationships like the approach of fib Model Code 2010 [1]. Current investigation at the Technische Universität Dresden focus on the bond behaviour and the bond stress distribution for ribbed bars with short and very short bond lengths under various loading conditions. The investigations include different types of specimens and the targeted use of fibre-optic measuring technology.