Shear fatigue behaviour of reinforced concrete elements without shear reinforcement

摘要

Many concrete structures such as bridge approach slabs, wind towers, maritime structures or bridge deck slabs, are able to suffer fatigue because they are subject to a high number of repeated loads. In spite of this, structural concrete codes do not typically include a verification of shear fatigue safety or those which do still prefer empirical formulations instead of advanced mechanical models. Although empirical S-N curves provide a practical and simple way to estimate fatigue strength, a rational approach is more desirable in order to understand the shear fatigue process. For this reason, this paper proposes a rational S-N-based model to predict the number of cycles to diagonal cracking based on the stress state at the tip of flexural cracks.