Analysis of support zones in composite concrete beams using MCFT

The paper presents the method of analyzing static work of support zones in concrete composite structures. This method is based on MCFT (Modified Compression Field Theory). While designing composite beams, the author allows only such cases, where the appearance of the interface crack is precluded by the diagonal crack. The case of support zones with diagonal cracks and locally cracked interface has been examined in detail. The distribution of strains, important from the viewpoint of bearing capacity of the sheared zones, at the height of the model beam, which was the subject of authorʹs research, has been developed. The method of evaluating the bearing capacity of composite elements with locally cracked interface based on MCFT is proposed.