Nonlinear Analysis for the Aseismic Strength of Highrise Steel Frame With Semi-Rigid Joints by Pseudo-Elastic Approach

by Ching-Churn Chern, Natl Taiwan Univ, Taiwan,
Yuan-Fu Liao, Natl Taiwan Univ, Taiwan,

Document Type: Proceeding Paper

Part of: Seismic Engineering: Research and Practice


This paper suggests that the direct stiffness method is still useful in dealing with the nonlinear analysis for the aseismic capacity of highrise steel frame while the Pseudo-elastic approach is introduced. After the first plastic hinge appears, the steel frame will perform inelastically since steel members and connections shall behave in according with elasto-plastic model; however, the elasto-plastic equivalent strain energy relationship is emphasized so that the pseudo-elastic response could be transfered to the real inelastic response with seismic loads which can be amplified linearly from a given earthquake, the frame can be analyzed nonlinearly for its aseismic capacity and ductility rapidly.

Subject Headings: Steel frames | Nonlinear analysis | Structural strength | Strength of materials | High-strength steel | Rigid frames | Joints | Load bearing capacity

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