proposed algorithm to accelerate the anisotropic rankine-hill model in nonlinear analysis of masonry structures

 in order to analyze the masonry structure with large number of unit and joint, usage of the macro- modeling is un-avoidable. an accurate analysis of masonry structures in a macro-modeling per-spective requires a material description for all stress states. difficulties arise especially due to the fact that almost no comprehensive experimental results are available (either for pre- and post-peak behavior), but also due to the intrinsic complexity of formulating anisotropic inelastic behavior. only a few authors tried to develop specific macro-models for the analysis of masonry structures, in which anisotropic elasticity is combined with anisotropic inelastic behavior. in this paper, the rankine-hill macro-model detailed in practical user code, with purpose the accelerate localized solutions of nonlinear analysis in masonry structure.