Schubversuche an Stahlbetonbalken unterschiedlicher M/V-Kombinationen

Shear tests on reinforced concrete beams with different M/V-combinations

This paper presents an experimental investigation on the effect of structural system and load configuration on the shear behavior of flexural reinforced concrete (RC) members without shear reinforcement. A total of ten rectangular beams with three structural systems and two load configurations were tested. With the chosen test set-up, almost all M/V-combinations commonly encountered in practice can be investigated. The test results indicate significant differences of the shear capacity of members with different M/V-combinations. The shear capacity of the simply supported beam under a uniform load is higher than that of similar beams under a concentrated load. Moreover, the shear capacity of the cantilever and continuous beams under uniform load is significantly higher than that of simply supported beams. Generally, it can be concluded that the co-existing flexural action has a positive influence on the shear resistance of a RC member without shear reinforcement. Furthermore, the flexural crack pattern plays an important role in the shear resistance of slender RC members.