Model for Mild Steel in Inelastic Frame Analysis

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Abstract
A model for mild steel is proposed for use in inelastic analysis of frames. The model is characterized by a stiffness degradation factor, α, and a yield stress growth factor, β. These are obtained by fitting the model to results of uniaxial experiments, which are in turn used in a frame analysis program FRAME 63. The proposed material model has potential application to simulate the special features of mild steel in monotonic and reversed loadings. As a particular case, it represents Masing type of inelasticity, and another version, i.e., Masing inelasticity with stiffness degradation.

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