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A multiaxial degrading hysteretic model is developed, enabling consistent multiaxial yield/capacity surface evolution with degradations, and is appropriately incorporated in a finite-element framework using hysteretic Timoshenko beam elements. Degradation phenomena are introduced in this model in the form of either symmetric or asymmetric strength degradation, stiffness degradation, pinching functions, and various combinations thereof. More specifically, a new strength degradation function is developed and enhancements in other existing functions are suggested to simulate the physically observed degradation phenomena in structural elements. The degradation functions are then employed in a multiaxial classical damage-plasticity framework to satisfy the consistency criterion of the yield/capacity surface, thereby resulting in a set of new multiaxial hysteretic evolution equations. The proposed evolution …