A robust computational strategy for failure prediction of masonry structures using an improved multi‐surface damage‐plastic based interface model

In this study, a new traction-separation based constitutive model for use in finite element simulation of masonry joints under complex loading conditions is developed cohesive elements. The proposed formulated using damage parameters and plastic deformation with mutual couplings, can accurately simulate the nonlinear behaviors considering hardening or softening strength stiffness degradation. To enhance numerical stability model, plasticity are separated algorithmically implemented two phases. first phase, deformations treated multi-surface composed smooth hyperbolic yield surface tension-shear mixed-mode failure an elliptical cap primarily compressive failure. This effective stress space helps restrict evolution surfaces no softening, significantly enhancing efficiency return mapping by closed point projection method. addition, adaptive sub-stepping scheme adopted to further improve robustness implementation. second nominal stresses computed from parameters. these defined terms work which polynomial form, recommended study better calibration capability. Improvements made formulation including incorporation degradations as ignored existing interface models. approach helped cyclic loads tension-compression transitions. For structural level applications, within program, utilized number specimens in-plane/out-of-plane monotonic/cyclic loading. simulated results rigorously validated experimental data that shows good potential modeling structures.