Round-Robin analysis of over-reinforced concrete beams—Comparison of results

Following the Round-Robin test on compressive softening, RILEM TC 148-SSC (“Strain Softening of Concrete”, see [1]) has proposed a second Round-Robin on the application of strain-softening data from simple uniaxial compression tests for the analysis of over-reinforced beams. The beams were tested at Aalborg University in Denmark in 1996. The Round-Robin is carried out in collaboration with ACI-ASCE committee 447 (“Finite Element Analysis of Reinforced Concrete Structures”). The results of the beam tests have been kept confidential, and researchers were invited to analyze the beams given the compressive and tensile properties of the concrete and the reinforcement. In total six contributions were submitted, which were compared to the experimental results in a workshop at the 3rd International Conference on Fracture Mechanics of Concrete and Concrete Structures, in Gifu, Japan in October 1998. In this report the outcome of the different analyses are summarized and the results are compared to the experimentally obtained peak loads, ductility and size effect.