Evaluation of Steel Structure Deterioration with Cyclic Damaged Plasticity

Abstract eng:
In analysis and design of structures subjected to earthquakes, the cyclic and dynamic nature of the response leads to complications. Material models need to account for cyclic plasticity, including deterioration and eventual failure due to low-cycle fatigue. A cyclic damage plasticity model is implemented to combine nonlinear kinematic hardening, isotropic hardening, and isotropic damage evolution based on continuum damage mechanics, reproducing an approximation to the Manson-Coffin low-cycle fatigue rule without cycle counting. This makes it possible to model the decrease in the material’s ability to deform inelastically, and provides considerable insight into the mode of failure and the effects of local detailing of steel structures.

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