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A gradual spread inelasticity model for R/C beam-columns accounting for flexure, shear and anchorage slip

This study proposes a new column finite element for seismic assessment of reinforced concrete structures. The model accounts for flexure, shear and anchorage slip and it is the first with variable length inelastic flexural and shear end-zones. Furthermore, it incorporates an innovative strategy for modelling shear-flexure interaction, which links directly, for first time, two well established analytical methodologies: the truss analogy approach (Park and Paulay 1975) and the shear strength model by Priestley et al. (1993). In this manner, response of shear deficient concrete structures, which represent a significant part of the existing building stock, is predicted reliably.