Simplified Second-Order Inelastic Analysis for Steel Frame Design

by Maheeb Abdel-Ghaffar, Purdue Univ, West Lafayette, United States,
Donald W. White, Purdue Univ, West Lafayette, United States,
Wai-Fah Chen, Purdue Univ, West Lafayette, United States,

Document Type: Proceeding Paper

Part of: Approximate Methods and Verification Procedures of Structural Analysis and Design


Several current approaches are outlined that account for the spreading of plasticity in a second-order inelastic analysis of frames. The approaches are based on modifications to the simple plastic-hinge method and allow for a smooth transition in stiffness from initial yielding to the full yielding of the cross-section. The results show a closer representation of the actual structural response than obtained by conventional plastic-hinge analysis.

Subject Headings: Steel frames | Plastic analysis | Elasticity and Inelasticity | Steel structures | Plastic design | Structural analysis | Plasticity | Plastic hinges

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