Application of the Compression Chord Capacity Model to predict the fatigue shear strength of reinforced concrete members without stirrups

The Compression Chord Capacity Model (CCCM), previously developed by the authors with other colleagues, is a simplified model for the shear strength prediction of reinforced and prestressed concrete members with and without transverse reinforcement, with I, T or rectangular cross-section, which represents a useful tool for structural design and assessment in engineering practice. The principal advantage of the application of a mechanical model is the possibility to extend it to different cases, without the need of empirical calibrations. According to the CCCM, the shear strength depends on the concrete tensile strength. In this communication, the CCCM is extended to assess the fatigue shear strength of RC members just incorporating the equation proposed in Model Code 2010 for the concrete tensile fatigue strength. A good performance of the model was observed when analysing the ratio Vtest/Vpred through a previously published database, showing a low scatter (COV 14.7 %).